Billing Code Overview

HCPCS Level II code C9602 describes percutaneous transluminal coronary atherectomy, with drug eluting intracoronary stent, with coronary angioplasty when performed; single major coronary artery or branch. This procedure falls under 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 typical inpatient cardiology patient is an older adult admitted to the hospital with symptoms of acute coronary ischemia (for example chest pain, dyspnea, diaphoresis) and diagnostic evidence of coronary artery obstruction on coronary angiography. After diagnostic angiography identifies a significant lesion in a single major coronary artery or a major branch, the interventional cardiology team performs a percutaneous transluminal coronary atherectomy to debulk a calcified or resistant lesion, followed by placement of a drug‑eluting intracoronary stent and adjunctive coronary angioplasty as needed. The procedure is performed in the cardiac catheterization laboratory under monitored anesthesia or general anesthesia, typically documented in the inpatient hospital setting (POS 21). Preprocedural documentation includes indication (for example unstable angina or acute myocardial infarction), informed consent, medications administered, and clinical risk assessment. Operative note documents vessel treated, devices used (atherectomy device, drug‑eluting stent), angioplasty balloons, complications if any, and access site. Postprocedure notes include hemodynamic stability, access site management, antiplatelet therapy plan, and disposition (observation in telemetry unit or admission to cardiac floor or ICU). Billing is submitted using HCPCS Level II code C9602 for the described single major coronary artery or branch intervention.

Coding Specifications

• Modifiers

• 26: Professional Component — used when reporting only the physician’s professional work (interpretation, procedure) separate from the facility/technical component. Use when the hospital bills separately for technical component and the physician bills professional services.

• 51: Multiple Procedures — used when multiple distinct procedures are reported on the same day by the same provider and payer requirements permit. Apply per payer rules for surgical package reductions.

• 59: Distinct Procedural Service — used to indicate a procedure or service that is distinct or independent from other services performed on the same day; use when documentation supports separate procedural work not normally reported together.

• LT: Left Side — anatomical modifier indicating the left-sided procedure when laterality is reportable and required by payer.

• Provider Taxonomies

• 207RC0000X: Cardiovascular Disease Physician — specialization in general cardiology and management of cardiovascular disease.

• 207RI0011X: Interventional Cardiology Physician — specialization in catheter-based coronary and structural interventions, proceduralist for C9602.

• 207RG0300X: Geriatric Medicine Physician — specialization in care of older adults; may be involved in perioperative medical management and comorbidity optimization.

• Notes

• Use payer-specific guidance (for example Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, Medicare) for modifier sequencing, bundling edits, and documentation requirements. Payers may have distinct rules for application of 51, 59, and for use of 26 when professional and technical components are billable separately.

Related Diagnoses

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

  Relevance: Indicates chronic coronary atherosclerosis of a native vessel that may require percutaneous revascularization when flow‑limiting lesions are identified.

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

  Relevance: Represents unstable angina due to an atherosclerotic native coronary lesion; a common indication for urgent coronary intervention including atherectomy and stenting.

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

  Relevance: Documents ischemic symptoms attributable to native coronary atherosclerosis; may be used when angina type is not specified in the record accompanying revascularization.

• I20.0 — Unstable angina

  Relevance: Acute coronary syndrome diagnosis that often prompts invasive evaluation and possible percutaneous intervention such as the procedure described by C9602.

• I21.9 — Acute myocardial infarction, unspecified

  Relevance: Acute MI is an indication for urgent coronary intervention; documentation of MI supports the medical necessity of invasive revascularization procedures including atherectomy with stenting when clinically indicated.

Related Codes

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

  Relation: Represents stent placement with angioplasty without atherectomy; may be an alternative when atherectomy is not required. Commonly used as the primary code when only stent plus angioplasty is performed.

• 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)

  Relation: Add-on code to report each additional branch treated with stent/angioplasty in addition to a primary single-vessel code like C9600.

• C9603 — Percutaneous transluminal coronary atherectomy, with drug‑eluting intracoronary stent, with coronary angioplasty when performed; each additional branch of a major coronary artery (List separately in addition to code for primary procedure)

  Relation: Add-on code to report atherectomy plus stent/angioplasty for each additional branch when C9602 is reported for the primary 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

  Relation: Used when the revascularization is performed through a coronary artery bypass graft rather than native coronary artery; an alternative for graft interventions rather than native-vessel procedures.

• Common simultaneous or alternative usage:

• C9602 is used for atherectomy plus drug‑eluting stent and angioplasty on a single native coronary artery or branch. If only stent/angioplasty is performed without atherectomy, C9600 is reported instead.

• When more than one branch is treated during the same session, report the primary procedure code (C9602 or C9600) for the first vessel and append-on codes C9601 or C9603 for each additional branch as appropriate.

• For graft-based revascularization, use C9604 rather than C9602.

National mean rates for HCPCS Level II code C9602 show Medicare below the commercial average (BUCA). The BUCA average commercial mean is $4,663.29, while the national commercial payer means vary widely, and Medicare is represented as $0.00 in the input.

Rate dispersion (P75 minus P25) is narrowest for Cigna Health (80 - 70 = $10) and Aetna (934 - 933 = $1), indicating tight distributions. Dispersion is widest for Blue Cross Blue Shield (10,235 - 40 = $10,195) and UnitedHealthcare (15,945 - 4,177 = $11,768), indicating large variability across providers. The table and chart below present the full breakdown.