Section 725.710 - How are payments for outpatient medical services determined?(a)(1) Except as provided in paragraphs (b) and (c) of this section, OWCP pays for outpatient medical services according to Ambulatory Payment Classifications (APCs) derived from the Outpatient Prospective Payment System (OPPS) devised by the Centers for Medicare & Medicaid Services (CMS) for the Medicare program ( 42 CFR part 419 ).(2) For outpatient medical services paid under the OPPS, such services are assigned according to the APC prescribed by CMS for that service. Each payment is derived by multiplying the prospectively established scaled relative weight for the service's clinical APC by a conversion factor to arrive at a national unadjusted payment rate for the APC. The labor portion of the national unadjusted payment rate is further adjusted by the hospital wage index for the area where payment is being made. Additional adjustments are also made as required or needed.(b) If a compensable service cannot be assigned or paid at the prevailing community rate under the OPPS or occurs at a facility excluded from the Medicare OPPS, OWCP may pay for the service based on fee schedules or other pricing formulas utilized by OWCP for outpatient services.(c) This section does not apply to services provided by ambulatory surgical centers.(d) This section applies to outpatient medical services rendered after April 26, 2020. 83 FR 27695 , June 14, 2018, as amended at 84 FR 64198 , Nov. 21, 2019