The CPT was incorporated as Level I codes into the HCPCS system by which organization?

The correct answer is that the CPT was incorporated as Level I codes into the HCPCS system by the American Medical Association (AMA). The AMA developed the Current Procedural Terminology (CPT) to standardize coding for medical procedures and services, which facilitates clear communication among healthcare providers and between providers and payers. The Centers for Medicare & Medicaid Services (CMS) utilizes the CPT codes by integrating them into the Healthcare Common Procedure Coding System (HCPCS) as Level I codes. This integration allows for consistency in coding practices across different healthcare settings and ensures that CPT codes are recognized and used for billing and reporting purposes in the Medicare program as well as by private insurers.

The roles of other organizations listed are distinct and do not pertain to the development or incorporation of CPT into HCPCS. Thus, the AMA is the key player in the development of CPT coding systems, which are recognized by CMS within HCPCS.