United States Department of Labor

Employees’ Compensation Appeals Board

__________________________________________

W.R., Appellant

and

DEPARTMENT OF THE AIR FORCE, 

MATERIEL COMMAND, TINKER AIR 

FORCE BASE, OK, Employer

__________________________________________

)

)

)

)

)

)

)

)

)

Docket No. 17-1605

Issued: September 19, 2018

Appearances: Case Submitted on the Record

Appellant, pro se

Office of Solicitor, for the Director

DECISION AND ORDER

Before:

CHRISTOPHER J. GODFREY, Chief Judge

ALEC J. KOROMILAS, Alternate Judge

VALERIE D. EVANS-HARRELL, Alternate Judge

JURISDICTION

On July 18, 2017 appellant filed a timely appeal from May 22 and 23, 2017 merit decisions

of the Office of Workers’ Compensation Programs (OWCP). Pursuant to the Federal Employees’

Compensation Act1(FECA) and 20 C.F.R. §§ 501.2(c) and 501.3, the Board has jurisdiction over 

the merits of this case.2

 

1 5 U.S.C. § 8101 et seq.

2 The record contains a June 13, 2017 decision in which OWCP set aside a March 2, 2017 decision regarding 

appellant’s request for authorization for right total knee replacement surgery and remanded the case for further 

development. As this matter is in an interlocutory posture, it is not before the Board. See 20 U.S.C. § 501.2(c)(2) 

(providing that there will be no appeal with respect to any interlocutory matter decided (or not decided) during the 

pendency of a case).
2

ISSUE

The issue is whether appellant has met her burden of proof to establish more than 40 percent 

permanent impairment of her left lower extremity and 20 percent permanent impairment of her 

right lower extremity, for which she previously received schedule award compensation.

FACTUAL HISTORY

On December 2, 2008 appellant, then a 51-year-old supervisory logistics management 

specialist, filed a traumatic injury claim (Form CA-1) alleging that, on November 24, 2008, while 

at work, she sustained injury due to falling off a chair while reaching for her purse on the floor. 

She stopped work on January 26, 2009.

OWCP initially accepted appellant’s claim for right knee/leg sprain (unspecified sites),

medial collateral ligament sprain of the right knee, and medial meniscus tear of the right knee. 

Appellant received leave buy back for the period January 26 to April 30, 2009. 

OWCP expanded the acceptance of the claim to include the conditions of medial meniscus 

tear of the left knee, medial collateral ligament sprain of the left knee, bilateral localized primary 

osteoarthritis/traumatic arthropathy of the lower legs, depressive disorder, sprains of the lumbar 

spine, sacroiliac ligaments, pelvis, left ankle, left hip, and left knee/leg, and other unspecified 

disorders of muscles, ligaments, and fascia. 

On April 6, 2009 appellant underwent OWCP-approved right knee surgery, including 

partial medial meniscectomy and chondroplasty of the patellofemoral joint/medial femoral 

condyle. 

On September 28, 2009 appellant underwent OWCP-approved partial medial and lateral 

meniscectomies of the left knee. 

On January 27, 2010 appellant filed a claim for compensation (Form CA-7) seeking a 

schedule award due to her accepted employment-related conditions. 

In a February 4, 2010 report, Dr. Todd Olsen, an attending Board-certified orthopedic 

surgeon, concluded that appellant had 18 percent permanent impairment of her left lower extremity 

under of the sixth edition of the American Medical Association, Guides to the Evaluation of 

Permanent Impairment (A.M.A., Guides).3 On April 1, 2010 Dr. Ronald Blum, a Board-certified 

orthopedic surgeon serving as an OWCP medical adviser, agreed with Dr. Olsen’s impairment 

rating evaluation.

In a July 22, 2010 report, Dr. Michael S. Smith, a Board-certified physical medicine and 

rehabilitation physician serving as an OWCP referral physician, determined that appellant had 20 

percent permanent impairment of her left lower extremity and 8 percent permanent impairment of 

her right lower extremity under the sixth edition of the A.M.A., Guides. 

 

3 A.M.A., Guides (6th ed. 2009).
3

By decision dated December 29, 2010, OWCP issued an award of compensation for 18 

percent permanent impairment of her left lower extremity.

4

 

In March 2011, OWCP referred the case to Dr. Michael M. Katz, a Board-certified 

orthopedic surgeon serving as an OWCP medical adviser. It requested that Dr. Katz review

Dr. Smith’s July 22, 2010 report and provide an opinion regarding appellant’s permanent 

impairment under the sixth edition of the A.M.A., Guides. In a March 31, 2011 report, Dr. Katz 

determined that appellant had 20 percent permanent impairment of her left lower extremity and 9 

percent permanent impairment of her right lower extremity under the sixth edition of the A.M.A., 

Guides.

By decision dated April 6, 2011, OWCP granted appellant a schedule award for an 

additional 2 percent permanent impairment of her left lower extremity (20 percent permanent 

impairment minus 18 percent permanent impairment previously awarded) and for 9 percent 

permanent impairment of her right lower extremity.

On January 5, 2012 appellant filed a claim for compensation (Form CA-7) seeking an 

increased schedule award due to her accepted employment conditions.5 

In a February 15, 2012 report, Dr. Christopher Jordan, a Board-certified orthopedic 

surgeon serving as an OWCP referral physician, determined that appellant had 9 percent 

permanent impairment of her left lower extremity and 20 percent permanent impairment of her 

right lower extremity under the sixth edition of the A.M.A., Guides. On March 30, 2012

Dr. Mobley, serving as an OWCP medical adviser, agreed with Dr. Jordan’s impairment rating 

evaluation.

By decision dated April 6, 2012, OWCP granted appellant a schedule award for an 

additional 11 percent permanent impairment of her right lower extremity (20 percent permanent 

impairment minus 9 percent permanent impairment previously awarded).

Appellant underwent additional OWCP-approved surgeries, including left total knee 

replacement on October 15, 2012, and partial medial/lateral meniscectomies and synovectomy of 

the suprapatellar pouch of the right knee on March 29, 2013.

 

4

It is unclear why OWCP did not consider Dr. Smith’s July 22, 2010 report prior to issuing this schedule award.

5 Appellant submitted an August 15, 2011 report in which Dr. John W. Ellis, an attending Board-certified family 

practitioner, determined that appellant had 32 percent permanent impairment of her left lower extremity and 16 percent 

permanent impairment of her right lower extremity. On January 12, 2012 Dr. Henry Mobley, a Board-certified 

internist serving as an OWCP medical adviser, indicated that he was unable to calculate a schedule award based on

Dr. Ellis’ August 15, 2011 report and recommended that OWCP refer appellant for a second opinion examination and 

impairment evaluation. 
4

On October 28, 2013 appellant filed a Form CA-7 seeking additional schedule award 

compensation.

6

In a January 27, 2014 report, Dr. Timothy G. Pettingell, a Board-certified physical 

medicine and rehabilitation physician serving as an OWCP referral physician, concluded that 

appellant had 31 percent permanent impairment of her left lower extremity and 8 percent 

permanent impairment of her right lower extremity under the sixth edition of the A.M.A., Guides. 

On March 21, 2014 Dr. Mobley, serving as an OWCP medical adviser, agreed with Dr. Pettingell’s 

impairment rating evaluation. 

By decision dated June 20, 2014, OWCP issued appellant a schedule award for an 

additional 11 percent permanent impairment of her left lower extremity (31 percent permanent 

impairment minus 20 percent permanent impairment previously awarded).

Appellant submitted a June 25, 2015 report from Dr. Donald E. Adams, an attending 

Board-certified orthopedic surgeon, who reported the findings of the physical examination he 

conducted on that date. Dr. Adams indicated that, upon range of motion testing, appellant had left 

knee flexion to 98 degrees and right knee flexion to 120 degrees. There was no instability upon 

varus-valgus stress testing of both knees. Dr. Adams indicated that, under Table 16-3 on page 511 

of the sixth edition of the A.M.A., Guides, appellant’s left total knee replacement fell under class 

3 with a default value of 37 percent permanent impairment of her left lower extremity. Under 

Table 16-16 through Table 16-18 on pages 516 through 520, appellant had a functional history 

grade modifier of 3, a physical examination grade modifier of 2, and a clinical studies grade 

modifier of 1. Dr. Adams noted that application of the net adjustment formula on page 521 

required movement one space to the left of the default value under Table 16-3 which meant that 

she had 34 percent permanent impairment of her left lower extremity due to her left knee 

replacement surgery. Under Table 16-2 on page 509, appellant’s soft tissue left ankle/foot 

condition fell under class 1 with a default value of one percent permanent impairment of her left 

lower extremity. Application of the net adjustment formula required movement to the space on 

Table 16-2 for two percent permanent impairment of her left lower extremity due to left ankle/foot 

deficits.

Dr. Adams used the Combined Values Chart on page 604 to combine the above-detailed 

34 and 2 percent impairment ratings and he concluded that appellant had 35 percent permanent 

impairment of her left lower extremity. He further indicated that, under Table 16-3 on page 509, 

the partial medial and lateral meniscectomies of her right knee fell under class 1 with a default 

value of 10 percent permanent impairment of her right lower extremity. Application of the net 

adjustment formula required movement two spaces to the right of the default value under Table 

16-3 which meant that appellant had 13 percent permanent impairment of her right lower extremity

due to her right knee surgery.

 

6 Appellant submitted an August 12, 2013 report in which Dr. Ellis concluded that appellant had 59 percent 

permanent impairment of her left lower extremity and 35 percent permanent impairment of her right lower extremity. 

On November 29, 2013 Dr. Michael M. Katz, serving as an OWCP medical adviser, indicated that he was unable to 

calculate a schedule award based on Dr. Ellis’ August 12, 2013 report and recommended that OWCP refer appellant 

for a second opinion examination and impairment evaluation. 
5

On November 2, 2015 appellant filed a Form CA-7 seeking increased schedule award 

compensation. 

In support of her claim for increased schedule award compensation, appellant submitted an 

October 2, 2015 addendum report from Dr. Adams. In this report, Dr. Adams indicated that, under 

Table 16-4 on page 514, her left hip arthritis fell under class 1 with a default value of seven percent 

permanent impairment of her left lower extremity. Appellant had a functional history grade 

modifier of 3, physical examination grade modifier of 2, and clinical studies grade modifier of 1. 

Dr. Adams noted that application of the net adjustment formula required movement to the space 

on Table 16-4 for nine percent permanent impairment of her left lower extremity due to left hip 

arthritis. He used the Combined Values Chart to combine the 35 percent permanent impairment 

rating of the left lower extremity due to left knee and ankle/foot deficits (described in his June 25, 

2015 report) with the 9 percent permanent impairment rating of the left lower extremity due to left 

hip deficits. Dr. Adams concluded that appellant had 41 percent permanent impairment of her left 

lower extremity. 

In October 2016, OWCP referred appellant to Dr. Michael S. Brown for a second opinion 

evaluation and an opinion on permanent impairment. In a November 8, 2016 report, Dr. Brown 

determined that appellant had 22 percent permanent impairment of her left lower extremity and 8 

percent permanent impairment of her right lower extremity under the sixth edition of the A.M.A, 

Guides. He noted that, under Table 16-3 on page 511, appellant’s left total knee replacement fell 

under class 2 with a default value of 25 percent permanent impairment of her left lower extremity. 

Dr. Brown indicated that she had a functional history grade modifier of 2, physical examination 

grade modifier of 1, and clinical studies grade modifier of 0. He noted that application of the net 

adjustment formula required movement two spaces to the left of the default value under Table 16-

3 which meant that appellant had 21 percent permanent impairment of her left lower extremity due 

to her left knee replacement surgery. Under Table 16-2 on page 506, appellant’s left foot 

talonavicular condition fell under class 1 with a default value of one percent permanent impairment 

of her left lower extremity. Dr. Brown indicated that she had a physical examination grade 

modifier of 1, and that the functional history and clinical studies grade modifiers were not 

applicable. Application of the net adjustment formula did not require any movement from the 

default value on Table 16-2 and therefore appellant had one percent permanent impairment of her

left lower extremity due to left foot deficits. 

Dr. Brown used the Combined Values Chart on page 604 to combine the above-detailed 

21 and 1 percent impairment ratings and he concluded that appellant had 22 percent permanent 

impairment of her left lower extremity. He further indicated that, under Table 16-3 on page 509, 

the partial medial and lateral meniscectomies of her right knee fell under class 1 with a default 

value of 10 percent permanent impairment of her right lower extremity. Dr. Brown noted that 

appellant had a physical examination grade modifier of 1 and clinical studies grade modifier of 0, 

and that the functional history grade modifier was not applicable. Application of the net 

adjustment formula required movement one space to the right of the default value under Table 16-

3 which meant that she had eight percent permanent impairment of her right lower extremity due 

to her right knee surgery. 
6

On December 7, 2016 OWCP referred Dr. Brown’s November 8, 2016 report to Dr. Katz

in his capacity as an OWCP medical adviser and requested that he comment on the permanent 

impairment of appellant’s lower extremities.

In a December 10, 2016 report, Dr. Katz indicated that, under Table 16-3 on page 509, the 

partial medial and lateral meniscectomies of appellant’s right knee fell under class 1 with a default 

value of 10 percent permanent impairment of the right lower extremity. He noted that she had a 

functional history grade modifier of 1 and physical examination grade modifier of 1, and that the 

clinical studies grade modifier was not applicable. Application of the net adjustment formula did 

not require movement from the default value under Table 16-3 which meant that appellant had 10 

percent permanent impairment of her right lower extremity due to her right knee surgery. Dr. Katz 

advised that she was not entitled to additional schedule award compensation for her right lower 

extremity because she had already been compensated for 20 percent permanent impairment of her 

right lower extremity. He also determined that appellant had 23 percent permanent impairment of 

her left lower extremity due to her left knee, left foot/ankle, and left hip deficits which entitled her 

to schedule award compensation for an additional 3 percent permanent impairment of her left lower 

extremity.7

By decision dated January 5, 2017, OWCP granted appellant a schedule award for an 

additional 3 percent permanent impairment of her left lower extremity (34 percent permanent 

impairment minus 31 percent permanent impairment previously awarded). The award was based 

on Dr. Katz’ December 10, 2016 report. 

In April 2017, OWCP referred appellant’s case to Dr. Katz in his capacity as an OWCP 

medical adviser and requested that he comment on the impairment rating for her left lower 

extremity contained in Dr. Adams’ October 2, 2015 report. In an April 29, 2017 report, Dr. Katz 

found that she had 30 percent permanent impairment of her left lower extremity due to her left 

knee, left ankle/foot, and left hip deficits. 

OWCP requested that Dr. Katz clarify his April 29, 2017 report and he produced a May 3, 

2017 report which he advised superseded his December 10, 2016 and April 29, 2017 reports with 

respect to the permanent impairment of appellant’s left lower extremity. Dr. Katz indicated that 

he had reviewed Dr. Adam’s June 15 and October 2, 2015 reports, and noted that the date of 

maximum medical improvement was June 15, 2015. He indicated that he also had reviewed

Dr. Brown’s November 8, 2016 report and was modifying Dr. Brown’s impairment estimates with 

respect to left knee and left ankle/foot deficits in a manner which yielded higher impairment 

ratings. Dr. Katz noted that, under Table 16-3 on page 511, appellant’s left total knee replacement 

fell under class 2 with a default value of 25 percent permanent impairment of her left lower 

extremity. He indicated that she had a functional history grade modifier of 2 and physical 

examination grade modifier of 1, and that the clinical studies grade modifier was not applicable.8 

 

7 Dr. Katz indicated that appellant had been previously been awarded schedule award compensation for 20 percent 

permanent impairment of her left lower extremity and posited that therefore his 23 percent permanent impairment 

rating showed that she was entitled to additional compensation. In fact, appellant had previously been awarded 

schedule award compensation for 31 percent permanent impairment of her left lower extremity.

8 Dr. Katz noted that Dr. Brown had found a clinical studies grade modifier of 0. 
7

Dr. Katz noted that application of the net adjustment formula required movement one space to the 

left of the default value under Table 16-3 which meant that appellant had 23 percent permanent 

impairment of her left lower extremity due to left knee replacement surgery.9 Under Table 16-2 

on page 506, appellant’s left foot talonavicular condition fell under class 1 with a default value of 

one percent permanent impairment of her left lower extremity. Dr. Katz indicated that she had a 

functional history grade modifier of 2 and physical examination grade modifier of 1, and that the 

clinical studies grade modifier was not applicable. Application of the net adjustment formula did 

not require any movement from the default value on Table 16-2 and therefore appellant had one 

percent permanent impairment of her left lower extremity due to left foot deficits. Dr. Katz used 

the Combined Values Chart on page 604 to combine the above-detailed 23 and 1 percent 

impairment ratings and he concluded that she had 24 percent permanent impairment of her left 

lower extremity due to left knee and left foot/ankle deficits. 

Dr. Katz then determined that, under Table 16-4 on page 514, appellant’s left hip arthritis 

condition fell under class 1 with a default value of seven percent permanent impairment of her left 

lower extremity. He determined that she had a functional history grade modifier of 3 and a physical 

examination grade modifier of 2, and that the clinical studies grade was not applicable. Dr. Katz

noted that application of the net adjustment formula required movement to the space on Table 16-

4 for nine percent permanent impairment of appellant’s left lower extremity due to left hip arthritis. 

He indicated that the prior, non-overlapping award for permanent impairment of the left lower 

extremity of 31 percent (related to left foot/ankle and knee deficits) was first combined, using the 

Combined Values Chart on page 604, with the permanent impairment of the left lower extremity 

of 9 percent (related to left hip deficits) to yield a value of 37 percent permanent impairment of 

the left lower extremity. Dr. Katz then subtracted the prior award of 31 percent from this 37 

percent figure to equal 6 percent. Therefore, the net additional award then due appellant for 

permanent impairment of her left lower extremity was six percent.

On May 11, 2017 OWCP requested that Dr. Katz provide clarification of his May 3, 2017

report.

Dr. Katz reviewed the file on May 15, 2017 and produced a May 15, 2017 report. He 

indicated that the prior, non-overlapping award for permanent impairment of the left lower 

extremity of 34 percent (related to foot/ankle and knee deficits) was first combined, using the 

Combined Values Chart on page 604, with the permanent impairment of the left lower extremity 

of 9 percent (related to left hip deficits) to yield a value of 40 percent permanent impairment of 

the left lower extremity. Dr. Katz then subtracted the prior award of 34 percent from this 40 

percent figure to equal 6 percent. Therefore, the net additional award then due appellant for 

permanent impairment of her left lower extremity was six percent. 

By decision dated May 22, 2017, OWCP affirmed its January 5, 2017 decision with respect 

to its finding that appellant failed to establish more than 20 percent permanent impairment of her 

right lower extremity. It set aside its January 5, 2017 decision with respect to the permanent 

impairment of her left lower extremity and determined that she had 40 percent permanent 

impairment of that extremity under the sixth edition of the A.M.A., Guides. As appellant had 

 

9 Dr. Katz noted that Dr. Brown had found 21 percent permanent impairment of appellant’s left lower extremity 

due to left knee replacement surgery.
8

already received schedule award compensation for 34 percent permanent impairment of her left 

lower extremity, OWCP remanded the case for issuance of a schedule award for an additional six

percent permanent impairment of her left lower extremity. OWCP indicated that its determination 

was based on the opinion of Dr. Katz. 

By decision dated May 23, 2017, OWCP granted appellant a schedule award for an 

additional 6 percent permanent impairment of her left lower extremity (40 percent permanent 

impairment minus 34 percent permanent impairment previously awarded).

LEGAL PRECEDENT

The schedule award provision of the FECA10 and its implementing regulations

11 set forth 

the number of weeks of compensation payable to employees sustaining permanent impairment 

from loss, or loss of use, of scheduled members or functions of the body. However, FECA does 

not specify the manner in which the percentage of loss shall be determined. For consistent results 

and to ensure equal justice under the law to all claimants, good administrative practice necessitates 

the use of a single set of tables so that there may be uniform standards applicable to all claimants. 

The A.M.A., Guides has been adopted by the implementing regulations as the appropriate standard 

for evaluating schedule losses. The effective date of the sixth edition of the A.M.A., Guides is 

May 1, 2009.12

In determining impairment for the lower extremities under the sixth edition of the A.M.A., 

Guides, an evaluator must establish the appropriate diagnosis for each part of the lower extremity 

to be rated. With respect to the foot/ankle, knee, and hip, the relevant portions of the lower extremity 

for the present case, reference is made to Table 16-2 through Table 16-4 beginning on page 501.13 

After the Class of Diagnosis (CDX) is determined from each of these tables (including 

identification of a default grade value), the net adjustment formula is applied using the grade 

modifier for functional history (GMFH), grade modifier for physical examination (GMPE) and 

grade modifier for clinical studies (GMCS). The net adjustment formula is (GMFH - CDX) + 

(GMPE - CDX) + (GMCS - CDX).14

Section 8123(a) of FECA provides in pertinent part: “If there is disagreement between the 

physician making the examination for the United States and the physician of the employee, the 

Secretary shall appoint a third physician who shall make an examination.”

15

 When there are 

opposing reports of virtually equal weight and rationale, the case must be referred to an impartial 

 

10 5 U.S.C. § 8107.

11 20 C.F.R. § 10.404 (1999).

12 See Federal (FECA) Procedure Manual, Part 3 -- Medical, Schedule Awards, Chapter 3.700, Exhibit 1 

(January 2010); id. Part 2 -- Claims, Schedule Awards and Permanent Disability Claims, Chapter 2.808.5a 

(March 2017).

13 See A.M.A., Guides 501-15 (6th ed. 2009).

14 Id. at 515-22.

15 5 U.S.C. § 8123(a).
9

medical specialist, pursuant to section 8123(a) of FECA, to resolve the conflict in the medical 

evidence.16

ANALYSIS

The Board finds that, due to a conflict in the medical opinion evidence, the case is not is 

posture for decision regarding whether appellant has met her burden of proof to establish more 

than 40 percent permanent impairment of her left lower extremity and 20 percent permanent 

impairment of her right lower extremity, for which she previously received schedule awards.

By decision dated May 22, 2017, OWCP affirmed its prior determination that appellant 

failed to establish more than 20 percent permanent impairment of her right lower extremity. It set 

aside its prior determination with respect to the permanent impairment of her left lower extremity 

and determined that she had 40 percent permanent impairment of that extremity under the sixth 

edition of the A.M.A., Guides. On May 23, 2017 OWCP granted appellant a schedule award for 

an additional six percent permanent impairment of her left lower extremity.17 

First, the Board finds that there is a conflict in the medical opinion between Dr. Katz, 

OWCP’s medical adviser, and Dr. Adams, an attending physician, regarding the extent of the 

permanent impairment of appellant’s left lower extremity which requires further development of 

the present claim.18

In a May 3, 2017 report, Dr. Katz noted that, under Table 16-3 on page 511 of the sixth 

edition of the A.M.A, Guides, appellant’s left total knee replacement fell under class 2 with a 

default value of 25 percent permanent impairment of her left lower extremity.19 He indicated that 

she had a functional history grade modifier of 2, physical examination grade modifier of 1, and 

that the clinical studies grade modifier was not applicable. Dr. Katz noted that application of the 

net adjustment formula required movement one space to the left of the default value under Table 

16-3 which meant that appellant had 23 percent permanent impairment of her left lower extremity 

due to left knee replacement surgery.20 Under Table 16-2 on page 506, appellant’s left foot 

talonavicular condition fell under class 1 with a default value of one percent permanent impairment 

of the left lower extremity. Dr. Katz indicated that she had a functional history grade modifier of 

2 and physical examination grade modifier of 1, and that the clinical studies grade modifier was 

not applicable. Application of the net adjustment formula did not require any movement from the 

default value on Table 16-2 and therefore appellant had one percent permanent impairment of her 

left lower extremity due to left ankle/foot deficits. Dr. Katz used the Combined Values Chart on 

page 604 to combine the above-detailed 23 and 1 percent impairment ratings and he concluded 

 

16 William C. Bush, 40 ECAB 1064, 1975 (1989).

17 Prior to this time, OWCP had granted appellant schedule awards for total left lower extremity permanent 

impairment of 34 percent and total right lower extremity permanent impairment of 20 percent.

18 See supra notes 15 and 16.

19 A.M.A., Guides 511, Table 16-3.

20 See supra note 14 regarding the derivation of grade modifiers and application of the net adjustment formula.
10

that she had 24 percent permanent impairment of her left lower extremity due to her left knee and 

left foot/ankle deficits. 

Dr. Katz then determined that, under Table 16-4 on page 514, appellant’s left hip arthritis 

condition fell under class 1 with a default value of seven percent permanent impairment of her left

lower extremity. He found that she had a functional history grade modifier of 3 and a physical 

examination grade modifier of 2, and that the clinical studies grade was not applicable. Dr. Katz

noted that application of the net adjustment formula required movement to the space on Table 16-

4 for nine percent permanent impairment of appellant’s left lower extremity due to left hip arthritis. 

He indicated that the prior, non-overlapping award for permanent impairment of the left lower 

extremity of 31 percent (related to left foot/ankle and knee deficits) was first combined, using the 

Combined Values Chart on page 604, with the permanent impairment of the left lower extremity 

of 9 percent (related to left hip deficits) to yield a value of 37 percent permanent impairment of 

the left lower extremity. Dr. Katz then subtracted the prior award of 31 percent from this 37 

percent figure to equal 6 percent and then found that the net additional award then due appellant 

for permanent impairment of her left lower extremity was 6 percent. He therefore found that she

had 40 percent permanent impairment of her left lower extremity.21

In contrast, Dr. Adams provided an opinion in a June 25, 2015 report that appellant had a 

higher degree of left lower extremity permanent impairment under the sixth edition of the A.M.A., 

Guides. He noted that, under Table 16-3 on page 511, her left total knee replacement fell under 

class 3 with a default value of 37 percent permanent impairment of her left lower extremity. Under 

Table 16-16 through Table16-18 on pages 516 through 520, appellant had a functional history 

grade modifier of 3, a physical examination grade modifier of 2, and a clinical studies grade 

modifier of 1. Dr. Adams noted that application of the net adjustment formula on page 521 

required movement one space to the left of the default value under Table 16-3 which meant that 

she had 34 percent permanent impairment of her left lower extremity due to her left knee 

replacement surgery. Under Table 16-2 on page 509, appellant’s soft tissue left ankle/foot 

condition fell under class 1 with a default value of one percent permanent impairment of the left 

lower extremity. Application of the net adjustment formula required movement to the space on 

Table 16-2 for two percent permanent impairment of her left lower extremity due to left ankle/foot 

deficits. Dr. Adams used the Combined Values Chart on page 604 to combine the above-detailed 

34 and 2 percent impairment ratings and he concluded that appellant had 35 percent permanent 

impairment of her left lower extremity due to left knee and left ankle/foot deficits. In an October 2, 

2015 addendum report, he indicated that, under Table 16-4 on page 514, her left hip arthritis fell 

under class 1 with a default value of seven percent permanent impairment of her left lower 

extremity. Appellant had a functional history grade modifier of 3, a physical examination grade 

modifier of 2, and a clinical studies grade modifier of 1. Dr. Adams noted that application of the 

net adjustment formula required movement to the space on Table 16-4 for nine percent permanent 

impairment of her left lower extremity due to left hip arthritis. He used the Combined Values 

Chart to combine the 35 percent permanent impairment rating of the left lower extremity due to 

left knee and ankle/foot deficits (described in his June 25, 2015 report) with the 9 percent 

 

21 In a May 15, 2017 report, Dr. Katz identified the prior, non-overlapping award for permanent impairment of the 

left lower extremity as being 34 percent. In this report, he also determined that appellant was entitled to an additional 

six percent award for permanent impairment of her left lower extremity.
11

permanent impairment rating of the left lower extremity due to left hip deficits. Dr. Adams 

concluded that appellant had 41 percent permanent impairment of her left lower extremity.

Secondly, the Board further finds that there also is a conflict in the medical opinion 

evidence between Dr. Katz and Dr. Adams regarding the extent of appellant’s right lower 

extremity impairment which requires further development.

In a December 10, 2016 report, Dr. Katz indicated that, under Table 16-3 on page 509, the 

partial medial and lateral meniscectomies of appellant’s right knee fell under class 1 with a default 

value of 10 percent permanent impairment of the right lower extremity. He noted that she had a 

functional history grade modifier of 1 and physical examination grade modifier of 1, and that the 

clinical studies grade modifier was not applicable. Dr. Katz indicated that application of the net 

adjustment formula did not require movement of from the default value under Table 16-3 which 

meant that appellant had 10 percent permanent impairment of her right lower extremity due to her 

right knee surgery.

In contrast, Dr. Adams found in his June 25, 2015 report that, under Table 16-3 on page 

509, the partial medial and lateral meniscectomies of appellant’s right knee fell under class 1 with 

a default value of 10 percent permanent impairment of her right lower extremity. Application of 

the net adjustment formula required movement two spaces to the right of the default value under 

Table 16-3 which meant that she had 13 percent permanent impairment of her right lower extremity 

due to her right knee surgery.

Consequently, the case must be referred to an impartial medical specialist to resolve the 

conflict in the medical opinion evidence between Dr. Katz and Dr. Adams regarding the permanent 

impairment of appellant’s lower extremities. On remand OWCP should refer appellant, along with 

the case file and an updated statement of accepted facts, to an appropriate specialist for an impartial 

medical evaluation and report including a rationalized opinion on this matter. After carrying out 

this additional development, OWCP shall issue a de novo decision regarding her claim. 

CONCLUSION

The Board finds that, due to a conflict in the medical opinion evidence, the case is not in

posture for decision regarding whether appellant has met her burden of proof to establish more 

than 40 percent permanent impairment of her left lower extremity and 20 percent permanent 

impairment of her right lower extremity, for which she previously received schedule award

compensation. The case is remanded to OWCP for further development.
12

ORDER

IT IS HEREBY ORDERED THAT the May 23 and 22, 2017 decisions of the Office of 

Workers’ Compensation Programs are set aside, and the case is remanded to OWCP for further 

action consistent with this decision.

Issued: September 19, 2018

Washington, DC

Christopher J. Godfrey, Chief Judge

Employees’ Compensation Appeals Board

Alec J. Koromilas, Alternate Judge

Employees’ Compensation Appeals Board

Valerie D. Evans-Harrell, Alternate Judge

Employees’ Compensation Appeals Board