Know Your APCs for ASCs

APCs for outpatient procedures performed in ambulatory surgery centers (ASCs) are part of an averaging and bundling system using CPT® procedure, HCPCS Level II and revenue codes submitted to Medicare on CMS=1500 forms, with UB-04 claim forms used by ASCs to file claims to most other payors. The APC system utilizes “packages” of CPT® and HCPCS Level II codes, based on clinical and facility resources and establishes payment rates for each APC grouping. This means the physical and human resources needed to provide the service and the geographic costs are bundled together using annually adjusted formulae, much as in hospital inpatient billing. Certain medications, services, and durable medical equipment are considered “pass through” and can be reported separately from an APC revenue code.

APCs are assigned based on the CPT® and HCPCS Level II codes reported by the provider for each service. Usually, more than one code will fall into an APC category. More than one CPT® and HCPCS Level II codes can be reported if needed.

But not all CPT® and HCPCS Level II codes qualify. They are all assigned a status indicator denoting the code’s relation to APCs — whether they qualify and how. The ASC must be careful to avoid reporting a code denoted as not reimbursable for ASC services unless a modifier and documentation support it. As a result, a limited group of modifiers are recommended as well. The status indicators can be found on CMS files including the CPT and HCPCS Level II codes, and most commercially published codebooks include them as icons.

Examples of the indicators include the following: