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2. Physician fee schedule. (2021). Accessed. August 31, 2021: https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/PhysicianFeeSched.
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5. AMA releases 2021 CPT code set. (2020). Accessed. August 31, 2021: https://www.ama-assn.org/press-center/press-releases/ama-releases-2021-cpt-code-set.