Summary & Overview
HCPCS Level II C7552: Coronary Angiography with Flow Reserve, Initial Vessel
HCPCS Level II code C7552 represents a comprehensive coronary angiography service that includes catheter placement in native coronary arteries and bypass grafts, right heart catheterization, and intraprocedural physiologic assessment using intravascular Doppler velocity and/or pressure-derived coronary flow reserve measurements for the initial vessel, including pharmacologic stress when performed. This code is nationally significant because it captures combined anatomic and physiologic assessment during invasive coronary evaluation, impacting billing, quality measurement, and procedural coding consistency for complex diagnostic and interventional cardiology cases. Key payers reviewed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn: an overview of what C7552 covers clinically and procedurally; common payer coverage considerations and typical sites of service; companion codes and modifiers commonly used with complex coronary angiography (Data not available in the input for some specifics); and policy and billing issues relevant to hospitals and ambulatory surgery centers. The summary highlights practical coding boundaries for the initial vessel-level assessment and clarifies that this code denotes an integrated service combining angiographic imaging, graft assessment, and physiologic flow reserve testing performed during the same coronary angiography encounter.
Billing Code Overview
HCPCS Level II code C7552 describes catheter placement in coronary artery(s) for coronary angiography, including intraprocedural injection(s) for coronary angiography, imaging supervision and interpretation. The code also covers catheter placement(s) in bypass graft(s) (internal mammary, free arterial, venous grafts) with intraprocedural injection(s) for bypass graft angiography, right heart catheterization, and intravascular Doppler velocity and/or pressure-derived coronary flow reserve measurement (coronary vessel or graft) performed during coronary angiography, including pharmacologically induced stress, for the initial vessel.
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Service type: Diagnostic and interventional coronary angiography with physiologic coronary flow assessment
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Typical site of service: Cardiac catheterization laboratory or hospital-based cardiac catheterization suite (inpatient or outpatient settings)
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with a history of prior coronary artery bypass grafting (CABG), chronic stable angina, and exertional dyspnea is referred to the cardiac catheterization lab for evaluation of progressive chest pain despite maximal medical therapy. Noninvasive testing (pharmacologic stress imaging) demonstrated reversible ischemia in the territory of a prior graft. The interventional cardiology team schedules invasive coronary angiography with selective catheterization of native coronary arteries and bypass grafts, right heart catheterization, and physiologic assessment using intravascular Doppler velocity and pressure-derived coronary flow reserve (CFR) measurements with pharmacologic vasodilator stress.
Pre-procedure workflow includes patient consent, review of anticoagulation, baseline labs (including creatinine and coagulation studies), and documentation of indication and prior CABG status. In the procedure suite, arterial access (commonly femoral or radial) is obtained, diagnostic catheters are advanced to the coronary ostia and to bypass grafts (internal mammary, arterial, and venous grafts) for contrast angiography. Right heart catheterization is performed for hemodynamic assessment. Intravascular Doppler and pressure-wire measurements are obtained in an initial vessel to calculate CFR at baseline and after pharmacologic induction of hyperemia. Imaging supervision, interpretation, and documentation of findings (including graft patency, native vessel stenoses, CFR values, and plans for revascularization) complete the clinical workflow. Typical recovery includes monitoring for access site complications and post-procedural hemodynamic stability prior to discharge or admission for further management.
Coding Specifications
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