Medical Billing

ASC CPT Codes Guide 2026: Coding, Modifiers, Payment Rules & CMS Compliance

ASC CPT Codes Guide 2026: Coding, Modifiers, Payment Rules & CMS Compliance

ASC coding operates under tighter scrutiny than most providers realize. According to CMS’s 2024 Medicare Fee-for-Service Supplemental Improper Payment Data, the improper payment rate for ASCs sits at 14.7%, amounting to almost $656.3 million. That’s nearly double the Medicare FFS program-wide average. At the center of it all is CPT code selection: get it wrong, …

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