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Exhibit 31.2 CERTIFICATE OF PRINCIPAL FINANCIAL OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Stephen H. Murdock, certify that:  1.
    I have reviewed this annual report on Form 10-KSB of Orion HealthCorp, Inc. (the small
business issuer);2.
    Based on my knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light of the
circumstances under which such statements were made, not misleading with respect to the period
covered by this report;3.
    Based on my knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition, results of
operations and cash flows of the small business issuer as of, and for, the periods presented
in this report;4.
    The small business issuers other certifying officer(s) and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in Exchange Act
Rules 13a-15(e) and 15d-15(e)) for the small business issuer and have: (a) Designed such disclosure controls and procedures, or caused such disclosure controls
and procedures to be designed under our supervision, to ensure that material information
relating to the small business issuer, including its consolidated subsidiaries, is made known to
us by others within those entities, particularly during the period in which this report is being
prepared; (b) Evaluated the effectiveness of the small business issuers disclosure controls and
procedures and presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the period covered by this report based on
such evaluation; and (c) Disclosed in this report any change in the small business issuers internal control
over financial reporting that occurred during the small business issuers most recent fiscal
quarter (the small business issuers fourth fiscal quarter in the case of an annual report) that
has materially affected, or is reasonably likely to materially affect, the small business
issuers internal control over financial reporting; and  5.
    The small business issuers other certifying officer(s) and I have disclosed, based on our
most recent evaluation of internal control over financial reporting, to the small business
issuers auditors and the audit committee of the small business issuers board of directors
(or persons performing the equivalent functions): (a) All significant deficiencies and material weaknesses in the design or operation of
internal control over financial reporting which are reasonably likely to adversely affect the
small business issuers ability to record, process, summarize and report financial information;
and (b) Any fraud, whether or not material, that involves management or other employees who
have a significant role in the small business issuers internal control over financial
reporting. Dated this 26th day of April, 2005. /s/ Stephen H. Murdock Stephen H. Murdock, Chief Financial Officer(Principal Accounting Officer)