<PAGE>

               UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON,  D.C.  20549

                                   FORM 10-Q


[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1999

                                       OR

[_]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM ______________.
     TO ______________.

                        COMMISSION FILE NO.  000-23275

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
            (Exact name of registrant as specified in its charter)


            Delaware                                      77-0423465
 (State or other jurisdiction of                       (I.R.S. Employer
  incorporation or organization)                     Identification No.)


                               285 N. Wolfe Road
                          Sunnyvale, California 94086
         (Address of principal executive offices, including zip code)

                                (408) 773-9121
             (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports) and (2) has been subject to such filing
requirements for the past 90 days. Yes  X      No __
                                      -----

As of October 31, 1999 14,326,571 shares of the Registrant's Common Stock were
outstanding.
<PAGE>

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
                                     INDEX


<TABLE>
<CAPTION>
PART I.  FINANCIAL INFORMATION                                             Page
------------------------------                                             ----
<S>                                                                        <C>
Item 1.   Financial Statements (unaudited)

          Condensed Consolidated Balance Sheets as of
          September 30, 1999 and December 31, 1998..........................  3

          Condensed Consolidated Statements of Operations for the
          three and nine month periods ended September 30, 1999 and 1998....  4

          Condensed Consolidated Statements of Cash Flows for the
          nine month periods ended  September 30, 1999 and 1998.............  5

          Notes to Condensed Consolidated Financial Statements..............  6

Item 2.   Management's Discussion and Analysis of
          Financial Condition and Results of Operations.....................  8

Item 3.   Quantitative and Qualitative Disclosures of
          Market Risk....................................................... 18

PART II.  OTHER INFORMATION
---------------------------


Item 2.   Changes in Securities and Use of Proceeds......................... 19


Item 6.   Exhibits and Reports on Form 8-K.................................. 19

Signatures.................................................................. 20
</TABLE>

                                       2
<PAGE>

PART I - FINANCIAL INFORMATION
------------------------------

Item 1.  Financial Statements

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
                     Condensed Consolidated Balance Sheets
                                (In thousands)


<TABLE>
<CAPTION>
                                                              September 30,              December 31,
                                                                       1999                      1998
                                                                (Unaudited)                       (*)
                                                       ---------------------      --------------------
<S>                                                    <C>                        <C>
Assets
Current assets:
  Cash and cash equivalents                                         $ 23,886                  $ 32,280
  Accounts receivable, net                                             1,970                     1,329
  Inventories                                                          1,016                       806
  Other current assets                                                   206                       411
                                                       ---------------------      --------------------
Total current assets                                                  27,078                    34,826
Property and equipment, net                                            1,473                     1,601
Other assets                                                              90                        85
                                                       ---------------------      --------------------
                                                                    $ 28,641                  $ 36,512
                                                       ---------------------      --------------------
Liabilities and stockholders' equity
Current liabilities:
  Accounts payable                                                  $  2,209                  $  1,521
  Accrued liabilities                                                  2,615                     2,174
  Accrued compensation                                                 2,552                     1,858
  Accrued clinical costs                                                 472                       675
  Deferred revenue and related allowances                              1,351                       856
                                                       ---------------------      --------------------
Total current liabilities                                              9,199                     7,084

Stockholders' equity:
  Common stock                                                            14                        14
  Additional paid-in capital                                          65,195                    65,046
  Deferred stock compensation                                           (222)                     (450)
  Accumulated deficit                                                (45,545)                  (35,182)
                                                       ---------------------      --------------------
Total stockholders' equity                                            19,442                    29,428
                                                       ---------------------      --------------------
                                                                    $ 28,641                  $ 36,512
                                                       =====================      ====================
</TABLE>

(*)  Derived from audited financial statements.

                            See accompanying notes

                                       3
<PAGE>

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
                Condensed Consolidated Statements of Operations
                                  (Unaudited)
                     (In thousands, except per share data)



<TABLE>
<CAPTION>
                                                           For the Three Months               For the Nine Months Ended
                                                                   Ended                               Ended
                                                       -------------------------------    --------------------------------
                                                          Sept. 30,          Sept. 30,         Sept. 30,         Sept. 30,
                                                            1999*               1998             1999*             1998
                                                       -------------   ---------------    ---------------   ---------------
<S>                                                    <C>             <C>                <C>               <C>
Net revenues                                                 $ 3,175           $ 2,331          $  8,484         $  6,031
Cost of revenues                                               1,541             1,365             4,713            3,989
                                                       -------------   ---------------    ----------------  ---------------
Gross Margin                                                   1,634               966             3,771            2,042
Operating expenses:
    Research and development                                     878             1,963             4,248            5,992
    Selling, general and administrative                        3,843             3,759            11,015            9,752
                                                       -------------   ---------------    ----------------  ---------------
Total operating expenses                                       4,721             5,722            15,263           15,744
                                                       -------------   ---------------    ----------------- ---------------
Loss from operations                                          (3,087)           (4,756)          (11,492)         (13,702)

Interest and other income                                        307               469             1,129            1,541
Interest expense                                                   -                (1)               (-)              (3)
                                                       -------------   ---------------    ----------------- ---------------
Net Loss                                                     $(2,780)          $(4,288)         $(10,363)        $(12,164)
                                                            ========           =======           ========         ========
Net loss per share:
    Basic and Diluted                                         $(0.19)           $(0.31)           $(0.73)          $(0.89)
                                                            ========           =======           ========         ========
Shares used in computing per share amounts:
    Basic and Diluted                                         14,324            13,804            14,215           13,642
                                                            ========           =======           ========         ========
</TABLE>


* Revenue for the three and nine months ended September 30, 1999 includes
  related party revenue of $95,000 and $445,000, respectively. Interest and
  other income, net for the nine months ended September 30, 1999 includes
  nonrecurring technology and documentation fees from a related party of
  $133,000.

                            See accompanying notes

                                       4
<PAGE>

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
                Condensed Consolidated Statements of Cash Flows
                           (Unaudited, In thousands)


<TABLE>
<CAPTION>
                                                                                   For the Nine Months Ended
                                                                                  Sept. 30,               Sept. 30,
                                                                                       1999                    1998
                                                                        ---------------------    -------------------
<S>                                                                       <C>                    <C>
CASH FLOWS USED IN OPERATING ACTIVITIES
Net loss                                                                         $(10,363)               $(12,164)
Adjustments to reconcile net loss to net cash used in operating
 activities:
 Amortization of deferred compensation                                                463                   1,766
 Depreciation and amortization                                                        677                     612
 Net book value of property, plant and equipment retirements                            -                     115
 Changes in operating assets and liabilities:
    Other current assets                                                              205                      13
    Accounts receivable                                                              (641)                 (1,389)
    Inventories                                                                      (210)                   (639)
    Other assets noncurrent                                                            (5)                    (23)
    Accounts payable and other accrued liabilities                                  1,129                   1,413
    Accrued employee compensation                                                     694                     905
    Accrued clinical costs                                                           (203)                    340
    Deferred revenue and related allowances                                           495                     307
                                                                        -----------------        ----------------

Net cash used in operating activities                                              (7,759)                 (8,745)
                                                                        -----------------        ----------------

CASH FLOWS USED IN INVESTING ACTIVITIES
  Capital expenditures                                                               (548)                   (646)
  Repurchase of common stock                                                         (285)                      -
                                                                        -----------------        ----------------
Net cash used in investing activities                                                (833)                   (646)
                                                                        -----------------        ----------------
CASH FLOWS PROVIDED BY FINANCING ACTIVITIES
Net proceeds from issuance of common stock                                            198                     163
                                                                        -----------------        ----------------

Net cash provided by financing activities                                             198                     163
                                                                        -----------------        ----------------

Net decrease in cash and cash equivalents                                          (8,394)                 (9,228)
Cash and cash equivalents, beginning of period                                     32,280                  45,145
                                                                        -----------------        ----------------
Cash and cash equivalents, end of period                                         $ 23,886                $ 35,917
                                                                        =================        ================
Supplemental disclosure of cash flow information
Cash paid for interest                                                           $      -                $      3
</TABLE>

                             See accompanying notes

                                       5
<PAGE>

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
             NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                  (Unaudited)

NOTE 1 - Summary of Significant Accounting Policies
---------------------------------------------------

     Basis of Presentation

     The condensed consolidated balance sheet as of September 30, 1999, the
condensed consolidated statements of operations for the three and nine month
periods ended September 30, 1999 and 1998, and the condensed consolidated
statements of cash flows for the nine month periods ended September 30, 1999 and
1998, have been prepared by management, without audit, in accordance with
generally accepted accounting principles, for interim financial information and
pursuant to instructions to Form 10-Q and Article 10 of Regulation S-X.  In the
opinion of management, all adjustments (which include only normal recurring
adjustments) necessary to present fairly the financial position at September 30,
1999 and results of operations and cash flows for all periods presented have
been made.  The condensed consolidated balance sheet at December 31, 1998 has
been derived from the audited financial statements at that date.

     Certain information and footnote disclosures normally included in financial
statements prepared in accordance with generally accepted accounting principles
have been condensed or omitted pursuant to the Securities and Exchange
Commission's rules and regulations.

     These condensed financial statements should be read in conjunction with our
audited consolidated financial statements as included in our Annual Report on
Form 10-K for the year ended December 31, 1998, as filed with the Securities and
Exchange Commission.  The results of operations for the three and nine month
periods ended September 30, 1999 are not necessarily indicative of the results
to be expected for any subsequent quarter or for the entire fiscal year ending
December 31, 1999.

     Revenue Recognition

     We generally recognize revenue at the time products are shipped or, for
sales which are financed through third parties, upon acceptance from a third
party leasing company of a customer lease and the related equipment.  For
shipments to distributors made under agreements, revenue is generally recognized
upon sale by the distributor.  Allowances for product returns are provided for
at the time of revenue recognition.

     Comprehensive Loss

     We have no material components of other comprehensive loss and,
accordingly, the comprehensive loss is the same as the net loss for all periods
presented.

     Net Loss Per Share

     Basic and diluted loss per share has been calculated using the weighted
average common shares outstanding during the periods in accordance with
Statement No. 128 "Earnings Per share" issued by the Financial Accounting
Standards Board and Securities and Exchange Commission Staff Accounting Bulletin
(SAB) No. 98.

                                       6
<PAGE>

     We have securities outstanding that could dilute basic earnings per share
in the future that were not included in the computation of net loss per share in
the periods presented as their effect is antidilutive.

     Segment Information

     We have organized the business in one operating segment which includes
activities relating to development, manufacturing and marketing of medical
devices and utilization of proprietary radiofrequency technology for the
treatment of upper airway disorders.  Substantially all of our assets are in the
United States.

NOTE 2 - Inventories
--------------------

<TABLE>
<CAPTION>
(in thousands)                    September 30,        December 31,
                                           1999                1998
                                    (Unaudited)
<S>                               <C>                  <C>
Raw Materials                           $  338                 $399
Work in Process                            189                  111
Finished Goods                             489                  296
                                  ------------------------------------
                                        $1,016                 $806
                                  ====================================
</TABLE>

NOTE 3 - Stock Repurchase Program
---------------------------------

    In October 1998, we announced that our board of directors had authorized a
stock repurchase program permitting the purchase of up to 1,000,000 shares of
our common stock, at up to $5.00 per share, in the open market.  The stock
repurchase program was implemented during the first quarter of fiscal 1999 and
100,000 shares have been repurchased under the program as of September 30, 1999
for a net cash outflow of approximately $285,000.

                                       7
<PAGE>

Item 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

    The following discussion should be read in conjunction with the attached
condensed consolidated financial statements and notes thereto, and with our
audited financial statements and notes thereto for the fiscal year ended
December 31, 1998.

    The information set forth below contains forward-looking statements
(designated by an *), and our actual results could differ materially from those
anticipated in these forward-looking statements as a result of certain factors,
including those set forth below under "Factors That May Affect Future Results"
and those set forth under "Item One" in our Annual Report on Form 10-K for the
fiscal year ended December 31, 1998.

Overview

     Somnus Medical Technologies, Inc. designs, develops, manufactures and
markets innovative medical devices that utilize our proprietary RF technology
for the treatment of upper airway disorders.  Our SomnoplastySM System provides
physicians with a suite of products designed to offer minimally invasive,
curative treatment alternatives for disorders of the upper airway, including
obstructive sleep apnea (OSA), enlarged turbinates and snoring.

     We have a limited history of operations that, to date, has consisted
primarily of:

 .  Initiation and expansion of commercial operations,
 .  development of a direct sales force in the United States and internationally,
 .  training international distributor employees for distribution of the
   Somnoplasty System in the European Union (EU) and Asia/Pacific,
 .  research and development,
 .  product engineering and
 .  seeking clearance of our products from the Food & Drug Administration (FDA).

     We commercially introduced the Somnoplasty System internationally, through
a distributor, beginning in June 1997.  One month later, after receiving 510(k)
clearance from the FDA for the use of the Somnoplasty System to treat snoring,
we began direct sales of the Somnoplasty System in the United States.  We
subsequently received FDA clearance to treat enlarged turbinates, in December
1997, and OSA in November 1998.

     We ship product from our facility to end user customers within the United
States. Additionally, we have entered into independent distribution agreements,
several of which were executed during the first half of fiscal 1999, for
distribution of our products within Europe, Canada and Asia/Pacific. During
October 1999, we signed a distributor agreement in Japan. We expect to continue
to invest in our sales and marketing organization and to identify future
qualified distribution partners.*

     We plan to continue to hire personnel as required to support the current
and anticipated growth for:

 .  product development and enhancement,
 .  manufacturing expertise and large scale manufacturing capacity expansion,
 .  total quality management and
 .  continued clinical, regulatory and reimbursement efforts.*

                                       8
<PAGE>

     Additionally, we intend to invest in further production equipment, test
equipment, vertical integration and facility expansion to reduce manufacturing
costs, reduce manufacturing cycle time and increase production capacity and
product quality.*

     During the first quarter of fiscal 1999, we completed certain manufacturing
facility expansion and improved layout for increased capacity, process
improvement and quality control to support such growth.  During the second
quarter of fiscal 1999, we commenced implementation of a reporting tool to
extract data from our core enterprise resource planning system for enhanced
reporting and analysis across the company.  We believe this implementation will
involve an ongoing effort subsequent to the initial implementation.*  Personnel
hires and capital expenditures will continue to require operating capital on an
ongoing basis.*  We intend to continue to strengthen our management team,
improve processes, expand our internal reporting capabilities and further
strengthen systems to manage our expanding business, all of which will require
continued investment in personnel and capital equipment.*

     This current and anticipated significant growth of our sales and scope of
operations may place considerable strain on our management, financial,
manufacturing and other capabilities, procedures and controls.  There can be no
assurance that any existing or additional capabilities, procedures or controls
will be adequate to support our operations or that our capabilities, procedures
or controls will be designed, implemented or improved in a timely and cost-
effective manner.  Failure to implement, improve and expand such capabilities,
procedures and controls in an efficient manner could have a material adverse
effect on our business, financial condition and results of operations.

     As of September 30, 1999, we have incurred cumulative losses from inception
of approximately $45.5 million.  Moreover, we expect to incur significant
additional operating losses beyond the next 12 months primarily due to the
development of our manufacturing and sales and marketing capabilities along with
ongoing research and development efforts, including clinical studies and
expenses associated with our patent portfolio.* Our limited operating history
makes accurate prediction of future operating results difficult or impossible.

     Future revenues and results of operations may fluctuate significantly from
quarter to quarter or year to year and will depend upon numerous factors,
including the extent to which our products gain market acceptance, our ability
to increase the rate of sale of control units and handpiece consumption per
control unit, the scale-up of manufacturing capabilities, the expansion of sales
and marketing activities, our ability to attract and retain key personnel,
competition, the timing and success of new product introductions by us or our
competitors, the timing of regulatory clearances or approvals of those new
products and our ability to market our products in the United States and
internationally.  Accordingly, interim period comparisons of our operating
results are not necessarily meaningful and should not be relied upon as
indicators of likely future performance or annual operating results.

     Our business and financial results could be materially adversely affected
in the event that we are unable to market the Somnoplasty System effectively,
anticipate customer demand accurately or effectively manage new product
launches, pricing and cost containment pressures in health care.  Our operations
and financial results could also be significantly affected by international
factors, including oversight by numerous regulatory agencies, changes in foreign
currency exchange rates and foreign economic and political conditions.

                                       9
<PAGE>

Results of Operations

     Net revenue.   Our revenues for the three and nine months ended September
30, 1999 are derived primarily from sales of our Somnoplasty System, consisting
of the S2 control unit and disposable handpieces, to private practices,
hospitals, clinics and sleep centers. During the first half of fiscal 1998 the
control unit commercially available was the 215 RF.  The S2 control unit was
introduced in June 1998.  Net revenues for the three months ended September 30,
1999 (the third quarter) and nine months ended September 30, 1999 were
approximately $3.2 million and $8.5 million respectively, an increase over the
prior year period's net revenue of $0.8, or 36%, and $2.5 million, or 41%,
respectively. These increases are primarily due to increased sales of control
units and increased handpiece shipments driven by a higher installed base,
increased intensity of consumption by that installed base, plus additional
indications treatable with the Somnoplasty System.  These increases were
partially offset by lower average selling prices of the control units in fiscal
1999.  During the nine month periods ended September 30, 1999 and 1998, net
revenues were attributable to sales to customers principally in the United
States.  International markets accounted for approximately 12% of net revenues
in fiscal 1999 and an immaterial amount in fiscal 1998.  We expect that the sale
of control units will constitute a significant percentage of our total revenues
in the near term as we build an installed base of users.*  However, we expect
disposable handpieces to continue to increase as a percentage of total revenue,
year over year.*

     Cost of revenues.  Cost of revenues increased by approximately $176,000, or
13%, to $1.5 million and by $724,000, or 18%, to $4.7 million, for the third
quarter and nine months ended September 30, 1999, respectively, compared to the
prior year periods.  However, cost of revenues reduced as a percentage to
approximately 49% of net revenue for the third quarter of fiscal 1999, an
improvement of 10% from the prior year period percentage of 59% and to
approximately 56% of net revenue for the nine months ended September 30, 1999,
an improvement of 10% from the prior year period percentage of 66%.  Cost of
revenues consist primarily of salaries and wages, raw materials, subassemblies
and completed electronics, quality assurance and warranty costs.  In fiscal 1998
cost of revenues also included manufacturing start-up costs.

     The increase in cost of revenues for the third quarter and nine months
ended September 30, 1999 are primarily direct labor and material costs related
to higher volumes of product produced.  The reduction of cost of revenues as a
percentage of net revenues included the effect of certain fixed costs being
absorbed over these higher volumes, a change in product mix to a higher
proportion of higher margin handpieces and process improvements, partially
offset by the effect of lower average selling prices.   During the third
quarter, management initiated a device acquisition program, whereby control
units can be purchased at a reduced price if a customer commits to purchasing
certain handpiece volumes.  If a significant percentage of control units sold
are sold under this program, cost of revenues as a percentage of revenues will
increase.

     Research and development expenses.  Research and development (R&D) costs
for the third quarter and nine months ended September 30, 1999 were
approximately $878,000 and $4.2 million, respectively, a decrease over the prior
year periods of $1.1 million or 55% and $1.7 million, or 29%, respectively.
Research and development expenses are primarily comprised of salaries and
related expenses, prototype development costs, costs associated with
intellectual property, and clinical trial and regulatory approval expenses.

     The 1999 decrease in expenses for the third quarter and nine months is
primarily due to a decrease in salaries and employee related expenses due to
lower headcount including two open vice president and various other open
positions, lower costs associated with intellectual

                                       10
<PAGE>

property and the lower average cost of ongoing clinical trials to support
efficacy verses the high cost of trials in progress last fiscal year to support
FDA clearance. These were partially offset by increased consulting costs, in
part due to the open positions and also due to intensive clinical activity
substantiating the efficacy and safety of the Somnoplasty System. Additionally a
one-time charge of $214,000, being fifty percent of the severance costs of a
certain officer, was recorded in the first quarter of fiscal 1999, and a one-
time reversal of a clinical charge of $300,000 was recorded during the third
quarter of fiscal 1999. The nine month decrease also included lower outside
design and equipment costs associated with the intensive development efforts in
the first half of fiscal 1998. Non-cash stock compensation charges resulting
from stock option grants for the third quarter and nine months ended September
30, 1999 versus the same periods of 1998 are approximately $20,000 and $206,000,
respectively, versus $206,000 and $606,000, respectively.

     Selling, general and administrative. Selling, general and administrative
("SG&A") expenses for the third quarter and nine months ended September 30, 1999
were approximately $3.8 million and $11.0 million, respectively, an increase
over the prior year periods of $84,000, or 2%, and $1.3 million, or 13%,
respectively.  SG&A expenses primarily consist of executive salaries,
professional fees, facilities overhead, accounting, information systems and
human resources, general office administration expenses such as rent and
facility costs.

     The 1999 increase in SG&A for the third quarter and nine months is
primarily due to increased infrastructure costs, including our overseas office,
information systems, human resources and the facility remodeling in the first
quarter of fiscal 1999.  Additionally, higher commissions and travel and
entertainment costs are associated with the higher volume of sales in North
America.  A one-time charge of $214,000, being fifty percent of the severance
costs of a certain officer, was recorded in the first quarter of fiscal 1999.
These increases were partially offset by a one-time charge of $300,000 being the
severance costs of a certain officer in fiscal 1998. The third quarter of fiscal
1999 also included higher marketing costs related to the launch of a consumer
marketing campaign in specific areas of the United States.  Non-cash stock
compensation charges resulting from stock option grants for the third quarter
and nine months ended September 30, 1999 versus the same periods of 1998 are
approximately $24,000 and $213,000, respectively, versus $422,000 and $1.0
million, respectively.

     Interest and other income, net.  Interest and other income, net for the
third quarter and nine months ended September 30, 1999 was approximately
$307,000 and $1.1 million, respectively, compared to $469,000 and $1.5 million,
respectively, for the prior-year periods. The decreases are largely attributable
to the reduction in interest income earned on a decreasing balance of cash and
cash equivalents.  The nine month decrease is reduced by nonrecurring technology
and documentation fees received from a related party in the first quarter of
fiscal 1999.

Year 2000 Compliance

     Many currently installed computer systems and software products are coded
to accept only two digit entries in the date code field.  As a result, software
that records only the last two digits of the calendar year may not be able to
distinguish whether "00" means 1900 or 2000.  This may result in software
failures or the creation of erroneous results.

     We believe, based on our assessment process, upgrades and testing, vendor
assurances and contingency plan that we are substantially Year 2000 compliant.
Such compliance is defined as ensuring that mission critical operations
experience no interruption, or

                                       11
<PAGE>

if there is an interruption, that we will be able to continue to ship product
and service customers for a period of three weeks. Prolonged interruptions to
business are not planned for and could have a material adverse affect.

     We believe that our networking systems are Year 2000 compliant and our
enterprise resource planning (ERP) systems and telecommunications systems will
be Year 2000 compliant by the end of November 1999.*  We have contacted the
manufacturer of our ERP system and received written assurance that the operating
system, our implementation of the operating system and the database will be Year
2000 compliant after a minor upgrade already in progress and scheduled for
completion by the end of November 1999.*  We have upgraded our Microsoft
operating system and office suite to a version that Microsoft claims is Year
2000 compliant.  We have also upgraded our current telephone system to a version
that the manufacturer claims in year 2000 compliant.  We do not employ any other
mission critical software systems.  We are primarily relying upon assurances
provided by vendors and have performed minimal testing to supplement those
assurances.*  We have not and do not plan to perform substantial independent
testing to validate these manufacturer's claims.  Our product is not date
dependant and is therefore Year 2000 compliant.  However, while we believe we
have made significant progress in resolving known Year 2000 issues, we will
perform ongoing testing during the remainder of fiscal 1999 to reasonably ensure
Year 2000 compliance for our operations.*

     We have identified critical suppliers of products and services.  Our
reliance on our key suppliers, and therefore on the proper functioning of their
information systems and software, is increasing.  We have written to existing
critical suppliers to gain assurance from them of their Year 2000 readiness.
However, to date, we have not received responses from all suppliers contacted
and we believe we are unlikely to receive responses from all suppliers before
January 1, 2000.*  There can be no assurance that all of these suppliers or
future suppliers will be Year 2000 compliant.  Their failure to address Year
2000 issues could have a material adverse effect on us.

     Although it is difficult to estimate the total Year 2000 project costs, our
estimate is that such costs will total between approximately $75,000 and
$150,000, * which is not material to our business operations or financial
condition. We estimate we have incurred approximately $75,000 through September
30, 1999 on this project.  The expenses of the Year 2000 project are being
funded from existing cash reserves and through operating cash flows.

     Our contingency plan to address situations that may result if we are unable
to achieve Year 2000 readiness of our operations is for certain mission critical
operations for the three-week period immediately subsequent to January 1, 2000.
Mission critical operations have been identified by management as including:

  .  Somnus product,

     -  our product is not date dependant and is not dependent upon power
        supplies to our facility to store in inventory. Therefore we plan to
        build safety levels of raw materials and manufacture finished goods to
        ensure we have inventory on hand to support a three week interruption in
        production. * There can be no assurance however, that we can build the
        necessary safety levels of inventory in the period remaining prior to
        December 31, 1999.
     -  suppliers of energy and other utility companies may not be Year 2000
        compliant and may experience service interruptions.* A prolonged
        interruption in utility services could have a material adverse affect.

  .  Information systems, hardware and software,

                                       12
<PAGE>

     -  we are relying upon assurances from the manufacturers of our ERP,
        networking and telecommunications systems,

  .  Critical vendors,

     -  we have written to suppliers to gain assurances from them of their Year
        2000 readiness and will rely on their assurances,*
     -  we have implemented safety time into materials sourcing,
     -  where practicable we have identified alternate suppliers for critical
        materials

  .  Critical service providers,

     -  our cash and cash equivalents are held between three different financial
        institutions, we believe we will have access to cash unless all three
        institutions are not Year 2000 ready,*

     -  we have arrangements with and utilize alternate freight carriers,

     -  we are relying upon utilities companies being compliant, however, there
        can be no assurance that utility companies will be Year 2000 compliant

     There can be no assurance that our contingency plan will adequately address
issues that may arise in the Year 2000. Finally, we are also vulnerable to
external forces that might generally affect industry and commerce, such as
utility or transportation Year 2000 compliance failures and related service
interruptions.

     We believe that we are unlikely to experience a material adverse impact on
our financial condition or results of operations due to Year 2000 compliance
issues within our operations.*  However, since the assessment process is
ongoing, we believe Year 2000 compliance complications can not be fully known,
critical suppliers of components, services and others including utility
companies are outside our control, and potential liability issues are not clear,
the full potential impact of the Year 2000 on us is not known at this time.  If
management and our suppliers fail to remedy any Year 2000 issues, the most
likely worst case scenario would include one or a combination of the following
events occurring: interruption of electricity which would prevent the
manufacturing and testing of products; collapse of financial and communications
networks which would hinder the payment and collection of invoices as well as
basic business transactions conducted over the telephone or the internet;
shortages of supplies and parts resulting from "panic" buying or hoarding which
would adversely affect the manufacturing of products as well as ongoing research
and development; interruption in freight service which would prevent us from
delivering product.*  Any of these occurrences could result in material costs
and loss of revenue.  At this time, we are not able to estimate the extent or
duration of the events discussed above or to quantify the effect it would have
on our future revenues and results from operations.

Liquidity and Capital Resources

     Since inception through September 30, 1999, we have financed our operations
primarily through the private placement of equity securities, bank loans, lease
lines of credit, stockholder loans and our November 1997 IPO. From inception, we
raised approximately $16.4 million in net proceeds from private equity
financings.  We raised an additional $43.8 million from our IPO, net of costs of
$4.5 million.

     Cash and cash equivalents at September 30, 1999 were $23.9 million compared
to $32.3 million at December 31, 1998.

     Net cash used in operating activities was approximately $7.8 million for
the nine months ended September 30, 1999, compared to $8.7 million for the prior
year period.  Net cash used

                                       13
<PAGE>

in operating activities differs from our net loss for these comparison periods
primarily due to non-cash charges associated with the amortization of deferred
compensation, the depreciation of property and equipment, the reduction in other
current assets and the increase in accounts payable and other accruals and
deferrals. These sources of funds were offset by an increase in accounts
receivable, as we have increased sales of our products and an increase in
inventory as we ramp up for anticipated higher sales and year 2000 safety
levels. Net cash used in investing activities was approximately $833,000 for the
nine months ended September 30, 1999, compared to $646,000 for the prior-year
period, the net cash used in investing activities was primarily attributable to
capital expenditures during these periods and additionally the stock repurchase
program in the first half of 1999. Net cash provided by financing activities was
approximately $198,000 for the nine months ended September 30, 1999 and for the
prior year period was $163,000. Net cash provided by financing activities in
these nine month periods is primarily attributable to the exercise of options.

     We recorded deferred stock compensation expense for the difference between
the exercise price and the deemed fair value for financial statement
presentation purposes of our Common Stock, as determined by the Board of
Directors, for certain options granted.  The total unamortized deferred stock
compensation at September 30, 1999 is $222,000. Our amortized deferred
compensation expenses were approximately $228,000 in the nine months ended
September 30, 1999, compared to $1,766,000 for the respective 1998 period. The
remainder of the deferred stock compensation will be amortized over the
corresponding vesting period of each respective option, which is generally four
years from date of original issuance.*

     At September 30, 1999, our principal sources of liquidity consisted of
$23.9 million in cash and cash equivalents. There were no other material unused
sources of liquid assets at September 30, 1999.

     We currently anticipate that our capital expenditure requirements will be
approximately $1 million for the next twelve months.* These requirements relate
primarily to the acquisition of computer hardware and software, manufacturing
and test equipment and for additional leasehold improvements to handle
anticipated headcount additions.*

     We anticipate that our existing resources will enable the us to maintain
our current and planned operations at least through the next twelve months.*
However, there can be no assurance that we will not require additional funding
prior to such time.  Our future capital requirements will depend on many
factors, including the ability of management to establish and maintain strategic
distributor relationships, our ability to attract and retain key employees, the
time and cost in obtaining regulatory approvals, competing technological and
market developments, the cost of manufacturing, market penetration and other
factors.  There can be no assurance that additional financing to meet our
funding requirements will be available as needed.  If additional funds are
raised by issuing equity securities, substantial dilution to existing
stockholders may result. Insufficient funds may require us to delay, scale back
or eliminate some or all of our research or development programs or to
relinquish rights to products at an earlier stage of development or on less
favorable terms than we would otherwise seek to obtain.  The failure of
management to raise capital when needed would have a material adverse effect on
our business, financial condition and results of operations.

Factors That May Affect Future Results

     Our operating results may vary significantly depending on certain factors,
including the effect of lack of market acceptance of products, maintained rate
of increase of our installed

                                       14
<PAGE>

base or the rate of consumption of handpieces by that installed base, delays in
the introduction or shipment of new products, inability to attract and retain
key personnel, increased competition, delays in ongoing research and development
programs, litigation costs should we be involved in litigation, adverse changes
in the economic conditions in any of the several countries in which we do
business, a slower growth rate in our target markets, the uncertainty of
international regulatory clearances or approvals, and the factors set forth in
our annual report on form 10-K for the fiscal year ended December 31, 1998.

     Several factors will impact our ability to achieve market acceptance.

     RF tissue volume reduction in the upper airway is a new and novel
development.  Market acceptance of this procedure for the treatment of OSA,
enlarged turbinates and snoring could be adversely affected by numerous factors,
including:

 .  the lack of availability of third-party reimbursement,
 .  cost of the procedure,
 .  clinical acceptance,
 .  long-term effectiveness of tissue volume reduction ,
 .  effective physician training and
 .  patient acceptance.

     Third party reimbursement.  We do not anticipate that patients will receive
third-party reimbursement for use of the Somnoplasty System in the treatment of
snoring.*  Market acceptance of the Somnoplasty System for the treatment of OSA
and enlarged turbinates will depend, in large part, upon the availability of
third-party reimbursement for each of those indications, which is not assured.*

     Cost of the procedure and clinical acceptance.  Market acceptance will also
depend upon our ability to demonstrate that the Somnoplasty System is an
attractive alternative to existing procedures, which will depend upon
physicians' evaluations of the clinical safety and efficacy, ease of use,
reliability and cost-effectiveness of the Somnoplasty System in a clinical
setting.*  We believe that recommendations and endorsements by influential
physicians will be essential to market acceptance.* There can be no assurance
that such recommendations or endorsements will be obtained.

     Long-term effectiveness. Market acceptance will depend, in large part, upon
the effectiveness of the Somnoplasty System over time.*  There can be no
assurance that the procedure will provide a permanent, curative treatment for
patients. Independent factors, such as aging and weight gain, may, over time,
lead to the enlargement of tissue in areas previously treated by our procedure.*
Such regrowth of tissue could require further treatments, making the procedure a
potentially less attractive alternative to existing surgical and non-surgical
procedures, which could have a material adverse effect upon our business,
financial condition and results of operations.

     Physician training.  Broad use of the Somnoplasty System will require
training for physicians on how to perform the Somnoplasty procedure and
educating physicians regarding the advantages of the Somnoplasty System over
currently available surgical and non-surgical approaches.*  The time required to
complete such training and education could extend the sales cycle for our
products and delay or preclude commercial sales and market acceptance. If we are
unable to achieve broad market acceptance of the Somnoplasty System for our
current and anticipated indications, our business, financial condition and
results of operations would be materially adversely affected.

                                       15
<PAGE>

     Patient acceptance.  Patient acceptance may be affected by numerous
factors, including the possibility that the Somnoplasty procedure will require
treatments on multiple occasions, which would be not only inconvenient for the
patient, but also more costly.*  Patients may require anywhere from one to six
treatments to significantly reduce snoring; however, we anticipate that most
patients will only require one to three treatments to significantly reduce
snoring.*  We anticipate that most patients will require fewer treatments to
reduce enlarged turbinates than required to reduce snoring and more to treat OSA
than snoring.*  Factors such as poor training of the treating physician or
improper use of the Somnoplasty System by the treating physician could lead to a
patient requiring more treatments. Patient acceptance of the Somnoplasty System
for the treatment of snoring, turbinate reduction, OSA, and other potential
indications will also depend in part upon physician recommendations as well as
other factors, including the effectiveness and reliability of the procedure as
compared to existing surgical and non-surgical procedures.*  There can be no
assurance that the Somnoplasty System will be accepted by the patient community
or that market demand for such a system will be sufficient to allow us to
achieve profitable operations. In addition, publicity arising from any adverse
outcome or other problem occurring in the treatment of a Somnoplasty patient for
any reason, particularly during this early phase of the commercialization of the
Somnoplasty System, could materially adversely affect patient demand for the
procedure.  Failure of the Somnoplasty System, for whatever reason, to achieve
significant patient acceptance would have a material adverse effect on our
business, financial condition and results of operations.

     We have limited direct sales and marketing experience.

     We have only limited experience selling and marketing the Somnoplasty
System for the treatment of OSA, enlarged turbinates and snoring. We are
directing our sales effort in the United States on private practices, clinics,
hospitals and sleep clinics through a direct sales force.  We currently have a
small direct sales force that covers certain regions of the United States and
intend to increase our sales and marketing force in the near future to
accelerate commercialization of the Somnoplasty System throughout the United
States.* There can be no assurance that we will be successful in building an
effective sales and marketing force, that we will be cost-effective or that we
will ultimately prove successful in selling the Somnoplasty System on a direct
basis in the United States in sufficient quantities for us to become profitable.
Market acceptance of the Somnoplasty System will also require us to demonstrate
that the cost of our products and procedures are competitive with currently
available alternatives.* The use of the Somnoplasty System requires the
healthcare provider to make an up-front investment in an RF control unit. There
can be no assurance that we will successfully generate sufficient demand for the
Somnoplasty System at the prices at which we currently offer our control units
and disposable devices.  In the event the required investment were to preclude
us from placing sufficient quantities of control units, our ability to sell
disposable devices would be limited, which would have a material adverse effect
on our business, financial condition and results of operations.

     We need to develop successful distributor relationships for international
sales.

     Our future success will depend, in part, on our ability to enter into and
successfully develop strategic and distributor relationships with other parties
with respect to the marketing and distribution of our products.*

     We ship product from our facility to end user customers within the United
States.  Additionally, we have entered into independent distribution agreements,
several of which were executed during the first half of fiscal 1999, for
distribution of our products within Europe, Canada and Asia/Pacific.  During
October 1999, we signed a distributor agreement in Japan.

                                       16
<PAGE>

We expect to continue to invest in our sales and marketing organization and to
identify future qualified distribution partners.*

     The success of our future strategic or distributor relationships, will
depend on the other parties' ability to perform the role contemplated by us.*
We may have limited or no control over the resources that any particular
strategic party or distributor devotes to our relationship with us.  There can
be no assurance that we will be successful in locating or finalizing agreements
with further qualified parties with whom to enter into additional strategic or
distributor relationships or that any such relationships can be maintained or
will ultimately prove beneficial to us. In the event we are not successful in
developing such additional relationships, or if such relationships do not prove
to be successful, our business, financial condition and results of operations
would be materially adversely affected.

     International sales of the Somnoplasty System are subject to numerous
risks.  Distribution, pricing and marketing structures, as well as regulatory
requirements, vary significantly from country to country.  Additionally, such
sales can be adversely affected by:

 .  limitations or disruptions caused by the imposition of government controls,
 .  difficulty in obtaining export licenses,
 .  political instability,
 .  trade restrictions,
 .  changes in foreign tax laws or tariffs or other trade regulations,
 .  difficulties coordinating communications among and managing international
   operations,
 .  the risk that distributors will fail to effectively promote our products,
 .  the risk of financial instability of distributors,
 .  fluctuations in overseas economic conditions and international currency
   exchange rates,
 .  increases in duty rates and
 .  competition.

     There can be no assurance that we will be able to successfully
commercialize the Somnoplasty System or any of our future products in any
international market, which would have a material adverse effect on our
business, financial condition and results of operations.

     We have a limited operating history and are not profitable.

     We have generated only limited revenues from sales of the Somnoplasty
System and have limited experience in manufacturing, selling and marketing our
products in commercial quantities. There can be no assurance that the
Somnoplasty System will be sufficiently successful for us to achieve significant
revenues. From inception in 1996 through September 30, 1999, we have had total
revenues of approximately $18.4 million and incurred cumulative losses of
approximately $45.5 million.  We expect to significantly increase spending over
the next several years with respect to sales and marketing, manufacturing and to
a lesser extent, ongoing research and development efforts and clinical trials,
and expect to incur significant additional losses beyond the next 12 months.*
Whether we can successfully manage the transition to a larger-scale enterprise
will depend upon a number of factors, including our ability to increase our
commercial manufacturing and sales and marketing capabilities.  Our inability to
establish such capabilities would have a material adverse effect on our
business, financial condition and results of operations.

     We may experience manufacturing problems with regard to our control unit.

                                       17
<PAGE>

     In the past we purchased our 215 RF control unit as a finished assembly
from a single-source supplier.  We discontinued selling the 215 RF control unit
model during fiscal 1998.  The S-2 control unit is manufactured largely by us in
our Sunnyvale, California facility.  There can be no assurance that we will not
experience design or production issues as we develop and expand such
manufacturing activities.

     We launched the S-2 during the second quarter of fiscal 1998..  There can
be no assurance that we will be able to continue to successfully market and sell
the S-2 control unit.  Further, there can be no assurance that we will not
experience increased levels of returns of the 215 RF control unit as a result of
the acceptance of the S-2 control unit or that we will continue to be able to
support the 215 RF control unit.  We may experience increased levels of warranty
costs associated with the new product.  Further, we expect that we will
continuously bring new generation products to market that may compliment or
replace current products.*  There can be no assurance that we can successfully
manage these product transitions.

     We are dependent on single-source suppliers for components.

     We purchase certain key components of our products from single-source
suppliers.  There can be no assurance that the components obtained from the
single-source suppliers will continue to be available in adequate quantities or,
if required, that we will be able to locate alternative sources of such
components on a timely and cost-effective basis.  To date, we have not
experienced significant adverse effects resulting from any shortage of
components.  However, there can be no assurance that the single-source suppliers
will meet our future requirements for timely delivery of components of
sufficient quality and in sufficient quantity.*  The components may take several
months to procure, and a significant increase of orders could lead to
significant delays and control unit or device shortages.  Such delays or
shortages, particularly as we scale up our manufacturing activities in support
of sales and distributor orders, would have a material adverse effect on our
business, financial condition and results of operations.

     We are dependent upon key personnel.

     Our future success depends in significant part upon the continued service
of certain key scientific, technical and management personnel and our ability to
attract and retain highly qualified scientific, technical and managerial
personnel.*  Competition for such personnel is intense, and there can be no
assurance that we can retain our key scientific, technical and managerial
personnel or that we can attract, assimilate or retain other highly qualified
scientific, technical and managerial personnel in the future.  We have taken
steps to retain our key employees, including the granting of stock options that
vest over time.  However, we continue to have open positions, including the Vice
President of Research and Development.  The loss of key personnel, especially if
without advanced notice, or the inability to hire or retain qualified personnel
could have a material adverse effect upon our business, financial condition and
results of operations.

     Due to the factors noted above, our future earnings and stock price may be
subject to significant volatility, particularly on a quarterly basis.  Any
shortfall in revenues or earnings from levels expected by security analysts
could have an immediate and significant adverse effect on the trading price of
our common stock.

Item 3.  Quantitative and Qualitative Disclosures of Market Risk

     There have been no material changes in the reported market risks since
December 31, 1998.

                                       18
<PAGE>

PART II  -  OTHER INFORMATION
-----------------------------

Item 2.  Changes in Securities and Use of Proceeds

     From the date of the sale of securities under our Registration Statement on
Form S-1 (File No. 333-35401), which was declared effective on November 5, 1997
(the "Offering"), through September 30, 1999, the approximate amount of net
proceeds used from the Offering were $10.1 million for research and development,
clinical trials and regulatory matters, $9.0 million to manufacture product and
further develop manufacturing expertise and capabilities, $20.3 million to
improve and expand financial capabilities, to enhance financial reporting
systems, to expand sales and marketing efforts, and for other general corporate
purposes and $1.4 million for the acquisition of fixed assets. The remaining net
proceeds from the IPO continue to be held in cash and cash equivalent
investments.

     All amounts represent estimates of direct or indirect payments of amounts
to third parties.  No amounts were paid directly or indirectly for the above
purposes to directors of officers of the Company, to persons owning ten percent
or more of any class of equity securities of the Company, or to affiliates of
the Company.  The use of proceeds described above do not represent a material
change in the use of proceeds describe in the Offering prospectus.


Item 6:  Exhibits and Reports on Form 8-K

     (a)  There were no reports on Form 8-K during the quarter ended September
          30, 1999.


          Exhibit 27.1 - Financial Data Schedule

                                       19
<PAGE>

                       SOMNUS MEDICAL TECHNOLOGIES, INC.
                       ---------------------------------

                                  SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                        SOMNUS MEDICAL TECHNOLOGIES, INC.
                                  (Registrant)




Date: November 12, 1999        By: /s/ John G. Schulte
                               ----------------------------
                               John G. Schulte
                               President and
                               Chief Executive Officer


                               By:   /s/  Robert D. McCulloch
                               ------------------------------
                               Robert D. McCulloch
                               Vice President of Finance
                               Chief Financial Officer and Chief Information
                               Officer (principal financial and accounting
                               officer)

                                       20