Which of the following is covered under the Outpatient Prospective Payment System (OPPS)?

Under Medicare, OPPS is the payment system used primarily forhospital outpatient department (HOPD)services paid under APCs, and it also applies to a limited set ofnon-hospital entitiesfor specific covered services. Community Mental Health Centers (CMHCs) are included under OPPSfor certain outpatient mental health services, most notably partial hospitalization–type services that are paid using OPPS methodology, which is why CMHCs are considered “covered under OPPS” in many outpatient CDI education materials. In contrast,clinical diagnostic laboratory servicesare generallyexcluded from OPPSand paid under the Clinical Laboratory Fee Schedule (with separate billing and payment rules).Indian Health Servicesfollow different statutory and payment structures and are not paid broadly under OPPS in the same way as HOPDs/CMHC OPPS services.Physical therapyreimbursement is typically governed by therapy-specific rules and fee schedule methodologies rather than being a standard OPPS-covered category in this context. Therefore, among the listed options, CMHCs are the correct OPPS-covered selection.