HCPCS C9608: Percutaneous Revascularization for Chronic Total Occlusion, Additional Vessel
HCPCS Level II code C9608 is an add-on code for percutaneous transluminal revascularization of chronic total occlusion (CTO) in coronary arteries, branches, or bypass grafts. It captures each additional vessel treated when the primary CTO revascularization procedure has been reported and is relevant nationally due to the growing use of complex percutaneous coronary interventions to manage chronic coronary occlusive disease. Appropriate coding of add-on vessels affects procedural reporting, payment bundling, and utilization monitoring for high-complexity cardiac interventions.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what C9608 represents clinically and operationally, comparisons to closely related HCPCS codes for single-vessel and acute-occlusion scenarios, and common billing considerations that influence claim adjudication. The publication also summarizes typical sites of service and the clinical context for use, and provides directions on where to find related codes to ensure accurate reporting of multi-vessel CTO interventions.
This national-level summary is intended to inform coding specialists, interventional cardiology practice managers, and revenue cycle stakeholders about the role of C9608 in documenting additional-vessel CTO revascularization procedures, and to clarify its relationship to primary procedure codes and other related HCPCS Level II codes.
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Billing Code Overview
HCPCS Level II code C9608 describes a percutaneous transluminal revascularization procedure for chronic total occlusion of a coronary artery, coronary artery branch, or coronary artery bypass graft. The code is an add-on code used to report each additional coronary artery, coronary artery branch, or bypass graft treated in conjunction with the primary procedure for chronic total occlusion.
Service type: Percutaneous coronary revascularization for chronic total occlusion, incorporating drug-eluting intracoronary stent placement, atherectomy, and angioplasty as applicable.
Typical site of service: Hospital catheterization laboratory or outpatient interventional cardiology suite, where percutaneous coronary interventions for complex chronic total occlusions are performed.
National Reimbursement Benchmarks
Commercial rates for C9608 cluster around a BUCA average commercial rate of $6,249.40, positioning that benchmark between several payer-specific distributions. Cigna shows the highest central tendency with a median of $16,622 and a wide upper tail (P90 $34,529), while Aetna and UnitedHealth Group have lower medians of $3,682 and $717 respectively. Blue Cross Blue Shield sits with a modest median of $655.70. These contrasts indicate distinct contracting structures across payers, with BUCA’s mean reflecting an overall commercial midpoint rather than the extremes.
Assessing dispersion (P75 minus P25) highlights variability: Cigna’s IQR is $12,439 (P75 $23,548.60 minus P25 $11,159.10), Aetna’s is $5,693.80, BUCA’s is $5,704.50, UnitedHealth Group’s is $2,705.60, and Blue Cross Blue Shield’s is $3,856.00. Cigna therefore exhibits the widest spread, while UnitedHealth Group is the tightest, signaling more concentrated reimbursement levels for UnitedHealth Group compared with greater variability for Cigna.