Summary & Overview
HCPCS C9608: Additional-Vessel PCI for Chronic Total Occlusion
HCPCS Level II code C9608 represents an add-on line for percutaneous transluminal revascularization of chronic total occlusions treated with any combination of drug‑eluting intracoronary stent, atherectomy and angioplasty. It is reported for each additional coronary artery, branch, or bypass graft treated and is intended to be used alongside the primary code for the initial vessel. The code applies to complex percutaneous coronary intervention (PCI) procedures and supports accurate distinction of multi-vessel chronic total occlusion work.
This publication addresses national implications for hospitals and interventional cardiology teams. Major commercial payers covered include Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. Medicare policy context is noted as Data not available in the input.
Readers will find: an explanation of what the code captures clinically and operationally; payer coverage considerations and common billing modifiers used with add-on vessel reporting; outpatient hospital facility assignment and APC context; and comparisons to related HCPCS lines for single-vessel and acute occlusion interventions. The brief also identifies where input data is missing and flags elements requiring local payer policy confirmation. The goal is to provide clinicians, coding staff, and revenue leaders with a concise reference to support accurate reporting of additional-vessel PCI for chronic total occlusions at the national level.
Billing Code Overview
HCPCS Level II code C9608 describes percutaneous transluminal revascularization of a chronic total occlusion in a coronary artery, coronary artery branch, or coronary artery bypass graft using any combination of a drug‑eluting intracoronary stent, atherectomy, and angioplasty. The code specifically represents the payment line for an each additional coronary artery, coronary artery branch, or bypass graft treated, and is reported in addition to the primary procedure code for the initial vessel.
Service Type: Cardiology — Percutaneous Coronary Intervention
Typical Site of Service: Outpatient hospital facility (OPPS, APC assignment to 0656)
Clinical & Coding Specifications
Clinical Context
An adult patient presents to the outpatient hospital interventional cardiology suite with chest pain and objective evidence of myocardial ischemia. Coronary angiography identifies a chronic total occlusion (CTO) of a major coronary artery, branch, or a coronary artery bypass graft supplying ischemic myocardium. The interventional cardiology team performs percutaneous transluminal revascularization of the CTO using any combination of drug‑eluting intracoronary stent placement, atherectomy, and angioplasty. If additional separate coronary arteries, branches, or bypass grafts are treated during the same session, HCPCS Level II code C9608 is listed in addition to the primary procedure code to report each additional vessel revascularized. Typical workflow: pre-procedure evaluation and informed consent in the outpatient hospital setting, angiographic mapping and guidewire crossing of the CTO, adjunctive atherectomy or balloon angioplasty as needed, placement of drug‑eluting stent(s), completion angiography, post-procedure monitoring in the recovery area, and documentation of vessels treated and devices used.
Coding Specifications
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Modifiers
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59(Distinct Procedural Service): Use when the additional revascularization reported by HCPCS Level II codeC9608is separate and distinct from other procedures performed during the same encounter (for example, when documenting an additional CTO vessel separate from the primary vessel). -
51(Multiple Procedures): Use when multiple procedures are performed during the same session to indicate multiple surgical/operative services have been rendered; may be applied according to payer rules whenC9608is billed in addition to a primary primary procedure code.