Summary & Overview
HCPCS Level II C9601: Drug‑Eluting Coronary Stent, Additional Branch
HCPCS Level II code C9601 denotes the percutaneous transcatheter placement of drug‑eluting intracoronary stent(s) for an additional branch of a major coronary artery, performed with coronary angioplasty when applicable. This interventional cardiology procedure is integral to contemporary acute and elective coronary revascularization strategies and carries significance for procedure reporting, hospital outpatient billing, and quality measurement across the United States. Key national payers include Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare.
This publication provides clinicians, coding professionals, and reimbursement analysts with a concise reference covering clinical context, billing and coding relationships, and payer coverage considerations for HCPCS Level II code C9601. Readers will find an overview of how the code fits with primary stent and angioplasty procedure codes, typical sites of service, commonly paired ICD‑10 principal diagnoses that justify the procedure, and related CPT/HCPCS codes used in coronary interventions. The summary outlines practical elements for claim preparation, common modifiers used when reporting additional procedures, and where data was missing from the source input. The goal is to clarify code intent and mapping so stakeholders can align documentation and billing workflows with clinical practice and payer policies.
Billing Code Overview
HCPCS Level II code C9601 describes 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). This procedure is an interventional cardiology service involving transcatheter stent placement to open narrowed coronary arteries and deploy drug‑eluting stents in additional branch vessels beyond the primary artery treated.
Typical sites of service include hospital outpatient settings, such as Ambulatory Surgical Centers or Outpatient Hospital departments. Common place of service codes for billing include Place of Service 19, 22, and 24.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient presenting to the hospital outpatient department with acute chest pain and evidence of myocardial ischemia on ECG and cardiac biomarkers is evaluated by an interventional cardiology team. Coronary angiography demonstrates a significant stenosis involving a main coronary artery with an additional affected branch. The clinical workflow includes initial assessment in the emergency or observation area, informed consent, preprocedural anticoagulation and antiplatelet planning, transport to the cardiac catheterization laboratory in the hospital outpatient setting or ambulatory surgical center (Place of Service 19/22/24), coronary angiography to define anatomy, and performance of percutaneous transcatheter placement of a drug‑eluting intracoronary stent for the primary lesion. HCPCS Level II code C9601 is reported in addition to the primary stent placement code to account for the additional branch treated. Documentation includes indication (for example, unstable angina or acute myocardial infarction), vessel(s) treated, number and type of stents, adjunctive angioplasty, complications, and device implant logs.
Coding Specifications
Modifier 26 - Professional Component
- Use when reporting the professional interpretation or physician work component separate from the technical services. Applies if the physician bills separately for the professional component of the procedure.
Modifier 59 - Distinct Procedural Service
- Use when the service or procedure is distinct or independent from other services performed on the same day, such as a separate branch intervention reported in addition to the primary stent procedure. Use based on documentation that supports separate and distinct procedural work.
Associated Provider Taxonomies