CPT code 36223 denotes the imaging supervision and interpretation portion of catheter‑based angiography performed via a distal arterial approach to the thoracic aorta and into the common carotid or cervicocerebral arch to visualize intracranial or extracranial arteries. Nationally, this code is important for hospitals and imaging centers that provide diagnostic cerebrovascular angiography, separating the professional interpretation component from the technical procedure. Common payers included in national coverage and payment discussions are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. This publication provides a concise overview of clinical context and billing implications for CPT code 36223, outlines common payer coverage practices, and summarizes typical service settings and benchmarks. Readers will find a clear description of what CPT code 36223 represents, how it fits into cerebrovascular imaging workflows, and what to expect in terms of payer coverage patterns and coding considerations. Data not available in the input for specific reimbursement rates, associated taxonomies, and ICD‑10 diagnosis pairings are noted as unavailable where applicable.