Billing Code Overview

HCPCS Level II code C9600 describes percutaneous transcatheter placement of drug eluting intracoronary stent(s), with coronary angioplasty when performed; single major coronary artery or branch. The procedure falls under the service type Percutaneous Transcatheter/Transluminal Coronary Procedures and is typically performed in an Inpatient Hospital (POS 21) setting. Data not available in the input.

Clinical Context

A 68-year-old patient with known atherosclerotic coronary artery disease presents to the inpatient hospital for evaluation after new onset exertional chest pain and an elevated troponin. Diagnostic coronary angiography identifies a significant, flow-limiting lesion in a single major coronary artery. The interventional cardiology team performs a percutaneous transcatheter procedure with coronary angioplasty and places a drug-eluting intracoronary stent to restore vessel patency. The procedure is performed in the catheterization laboratory while the patient is admitted (Place of Service 21). Post-procedure monitoring and antiplatelet management occur on the inpatient unit prior to discharge.

Coding Specifications

• HCPCS Level II code: C9600 — Percutaneous transcatheter placement of drug eluting intracoronary stent(s), with coronary angioplasty when performed; single major coronary artery or branch

• Common Modifiers:

• 26 — Professional Component

• Used to report the physicians professional work and interpretation when the service is split between professional and technical components.

• TC — Technical Component

• Used to report the facility or equipment and technical resources when the service is split between components.

• 59 — Distinct Procedural Service

• Used when a procedure or service is distinct or independent from other services performed on the same day.

• 51 — Multiple Procedures

• Used to indicate multiple procedures were performed at the same session; may affect reimbursement sequencing.

• Provider Taxonomies and Specialties:

• 207RC0000X — Cardiovascular Disease Physician

• Specialty that manages coronary artery disease and may perform or direct interventional care.

• 207RI0011X — Interventional Cardiology Physician

• Specialty that performs percutaneous coronary interventions, including stent placement and angioplasty.

• 207RG0300X — Geriatric Medicine Physician

• Specialty providing medical management of older adults; may be involved in peri-procedural care and comorbidity management.

Related Diagnoses

• I25.10 — Atherosclerotic heart disease of native coronary artery without angina pectoris

• Clinical relevance: Documents underlying coronary atherosclerosis as the chronic substrate for ischemic lesions that may require percutaneous stent placement.

• I20.9 — Angina pectoris, unspecified

• Clinical relevance: Represents symptomatic myocardial ischemia that can prompt diagnostic angiography and revascularization with angioplasty and stenting.

• I21.9 — Acute myocardial infarction, unspecified

• Clinical relevance: Acute MI can necessitate urgent percutaneous coronary intervention with angioplasty and drug-eluting stent placement to restore coronary perfusion.

• I25.119 — Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris

• Clinical relevance: Identifies atherosclerotic disease with anginal symptoms, indicating clinical justification for revascularization procedures such as C9600.

• I25.110 — Atherosclerotic heart disease of native coronary artery with unstable angina pectoris

• Clinical relevance: Unstable angina is an acute coronary syndrome often managed with invasive evaluation and possible percutaneous stent placement reflected by C9600.

Related Codes

• C9601 — Percutaneous transcatheter placement of drug‑eluting intracoronary stent(s), with coronary angioplasty when performed; each additional branch of a major coronary artery (list separately in addition to code for primary procedure)

• Typically billed in addition to C9600 when more than one branch of a major coronary artery receives a drug-eluting stent during the same session.

• C9602 — Percutaneous transluminal coronary atherectomy, with drug eluting intracoronary stent, with coronary angioplasty when performed; single major coronary artery or branch

• Represents an alternative or adjunct when plaque modification with atherectomy is performed before stent placement in a single vessel.

• C9604 — Percutaneous transluminal revascularization of or through coronary artery bypass graft (internal mammary, free arterial, venous), any combination of drug‑eluting intracoronary stent, atherectomy and angioplasty, including distal protection when performed; single vessel

• Used when the target vessel is a coronary artery bypass graft rather than a native coronary artery; alternative to C9600 in graft interventions.

• C9606 — Percutaneous transluminal revascularization of acute total/subtotal occlusion during acute myocardial infarction, coronary artery or coronary artery bypass graft, any combination of drug‑eluting intracoronary stent, atherectomy and angioplasty, including aspiration thrombectomy when performed, single vessel

• Used for acute MI cases with total or subtotal occlusion requiring thrombectomy and revascularization; may be billed instead of C9600 when the clinical setting is acute occlusion management.

• 92928 — Percutaneous transcatheter placement of intracoronary stent(s), with coronary angioplasty when performed; single major coronary artery or branch

• A widely used alternative code describing stent placement with angioplasty; may be reported in different payor contexts or when HCPCS Level II C9600 is not applicable.

• Common usage patterns:

• C9600 is billed for the primary single-vessel drug-eluting stent procedure. When additional branches are treated, C9601 is listed separately. When atherectomy is performed in the same vessel, C9602 can represent that combined technique. In cases involving bypass grafts, use C9604. For acute total occlusion during MI with aspiration thrombectomy, C9606 is used. 92928 functions as a commonly referenced procedural code for intracoronary stent with angioplasty and can be an alternative depending on payer requirements.

National mean allowed rates for HCPCS Level II code C9600 vary substantially across commercial payers and Medicare (BUCA). Medicare’s values are represented in the input as $0.00 for mean and percentiles, while the BUCA commercial average mean is $1,336.57, placing BUCA below most large commercial carriers but above Cigna Health on average.

Rate dispersion (P75 minus P25) is widest for UnitedHealthcare (difference of $11,631.50) and Blue Cross Blue Shield (difference of $6,499.50), indicating substantial variability in allowed amounts. Cigna Health shows the tightest dispersion (difference of $0.00), followed by Aetna (difference of $107.00) and BUCA (difference of $311.00). The table and chart below present the full breakdown of mean rates and key percentiles for each payer.