CPT code 0366T denotes a deleted interventional cardiology procedure code, removed effective January 1, 2019. The code historically represented an intracoronary or catheter-based cardiovascular service performed in a catheterization laboratory or procedural suite. Its deletion is relevant to coding accuracy, claims adjudication, and historical recordkeeping for providers performing coronary diagnostic or therapeutic interventions. National payers and clearinghouses rely on correct code usage to process claims and reconcile historical encounters.

Key payers included in this analysis are Aetna, Cigna Health, UnitedHealthcare, and Medicare. BUCA is an internal benchmark and is not listed as a payer. Readers will find an overview of the code's status, clinical context linking it to coronary interventions, and references to related active CPT codes that clinicians and coders may use for comparable services. The publication summarizes common associated diagnoses for which this type of procedure would have been billed and points to related CPT procedures for stenting, angioplasty, catheter placement for coronary angiography, and intravascular ultrasound.

This summary is intended to inform coding specialists, billing managers, and clinical leaders about the deleted status of 0366T, its clinical domain, and where to look for alternative active codes when documenting coronary interventional services. Data not available in the input: specific historical descriptor text beyond the deletion notice and payer-specific reimbursement details.