Summary & Overview

HCPCS C7553: Coronary Catheterization with Graft Angiography and Hemodynamic Assessment

HCPCS Level II code C7553 represents comprehensive coronary catheterization services that combine coronary angiography, right and left heart catheterization, bypass graft angiography, and pharmacologic agent administration with hemodynamic assessment. This code captures a complex diagnostic and physiologic evaluation used in coronary artery disease assessment and perioperative graft evaluation. Nationally, C7553 matters because it denotes a high-acuity cardiac diagnostic procedure often performed in catheterization laboratories and impacts hospital billing, resource allocation, and quality measurement for invasive cardiac evaluation.

Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical scope and service setting, payer coverage patterns and common billing modifiers, and benchmarks for utilization where available. The publication also summarizes policy considerations affecting coding and billing for combined angiography and hemodynamic testing, and provides clinical context to assist coding accuracy.

The report is intended for coding managers, hospital billing teams, and clinical leaders seeking concise guidance on the service components represented by C7553, typical sites of care, and what to expect from major national payers. Data not available in the input will be noted explicitly in relevant sections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareC7553HCPCS Level IIcoronary angiographycardiac catheterizationhemodynamic assessmentbypass graft angiographyinterventional cardiologyimaging supervision

Billing Code Overview

HCPCS Level II code C7553 describes catheter placement in coronary artery(s) for coronary angiography, including intraprocedural injection(s) for coronary angiography, imaging supervision and interpretation. The code also includes right and left heart catheterization with intraprocedural injection(s) for left ventriculography when performed, catheter placement(s) in bypass graft(s) (internal mammary, free arterial, venous grafts) with bypass graft angiography, and administration of pharmacologic agents (for example, inhaled nitric oxide, intravenous infusion of nitroprusside, dobutamine, milrinone, or other agent) including assessment of hemodynamic measurements before, during, after and repeat pharmacologic agent administration when performed.

Service type: Diagnostic and interventional coronary catheterization with hemodynamic assessment and pharmacologic provocation

Typical site of service: Cardiac catheterization laboratory or interventional cardiology suite, with imaging performed in the inpatient or outpatient hospital setting or ambulatory surgical center depending on clinical context.

Clinical & Coding Specifications

Clinical Context

A 68-year-old man with progressive exertional chest pain, known history of coronary artery disease with prior coronary artery bypass grafting (CABG), hypertension, and preserved left ventricular function is admitted for evaluation of suspected ischemia. Noninvasive testing demonstrates inducible ischemia in the anterior and lateral walls. The interventional cardiology team schedules an invasive diagnostic procedure: catheter placement in coronary artery(s) for coronary angiography with right and left heart catheterization, selective catheterization and angiography of native coronaries and bypass grafts (internal mammary and saphenous vein grafts), and left ventriculography. During the procedure, pharmacologic agents (for example, intravenous nitroprusside and dobutamine) are administered to assess hemodynamics and provoke or treat ischemia while intracardiac and systemic pressures are measured before, during, and after administration.

Workflow:

Patient evaluated in pre-procedure area; informed consent and review of indications, anticoagulation status, and allergies completed.
Local vascular access achieved (commonly femoral or radial artery) and arterial sheath placed.
Diagnostic coronary guide catheters advanced for selective coronary angiography; contrast injections performed with fluoroscopic imaging; grafts are selectively catheterized and imaged if prior CABG present.
Right heart catheterization performed via venous access when indicated to measure pulmonary artery pressures and cardiac output.
Left ventriculography performed during left-sided catheterization if indicated to assess LV function.
Pharmacologic agents administered intravenously or inhaled as indicated (eg, vasodilators, inotropes) with serial hemodynamic measurements recorded before, during, and after dosing.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, or complexity substantially exceeds usual for the angiography and hemodynamic assessment documented in the record.
`23`	Unusual anesthesia	Use when general anesthesia is required for a diagnostic coronary angiography/heart catheterization procedure.
`52`	Reduced services	Use when a portion of the service is intentionally reduced or not completed but not aborted for patient or medical reasons.
`53`	Discontinued procedure	Use when the procedure is started but stopped due to extenuating circumstances or patient condition.
`54`	Surgical care only	Use when another clinician performs only the surgical portion and the global period is divided (rare for diagnostic catheterization).
`55`	Postoperative management only	Use when only postoperative care is provided by the reporting clinician.
`56`	Preoperative management only	Use when only preoperative evaluation is performed by reporting clinician.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons during a portion of the procedure (rare for catheterization but applicable if hybrid surgical-interventional procedure occurs).
`73`	Discontinued outpatient procedure prior to anesthesia	Use when outpatient procedure is discontinued before anesthesia/ sedation begins.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an advanced practitioner assists during the procedure per payer rules.
`CO`	Child health services provided by a physician who is not the usual attending	Use per payer when a child is treated by a non-attending physician (limited applicability).
`CQ`	Service furnished by a physician when a qualified nonphysician practitioner (QNP) performs part of the service	Use when a QNP provides portions of the service per payer rules.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures	Use when the physician medically directs multiple concurrent anesthesia services associated with the case.
`QX`	Certified registered nurse anesthetist (CRNA) service with medical direction by a physician	Use when CRNA provides anesthesia with physician direction.

Taxonomy Code	Specialty	Notes
`207RC0000X`	Cardiology	Interventional cardiologists perform coronary angiography and invasive hemodynamic procedures.
`207RK0100X`	Cardiothoracic Surgery	Surgeons may be involved for hybrid procedures or graft assessment intraoperatively.
`207RG0100X`	Interventional Cardiology	Proceduralists who specialize in catheter-based coronary and graft interventions.
`2080P0003X`	Emergency Medicine	May perform emergent catheterization activation/triage and stabilization prior to procedure.
`363A00000X`	Vascular Surgery	May be involved for complex vascular access or hybrid endovascular procedures.

ICD-10 Code	Description	Clinical Relevance
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Common indication for diagnostic coronary angiography to define native coronary anatomy.
`I20.9`	Angina pectoris, unspecified	Typical presenting symptom prompting coronary angiography to evaluate for obstructive coronary disease.
`I21.9`	Acute myocardial infarction, unspecified	Acute coronary syndromes frequently require urgent coronary angiography and hemodynamic assessment.
`I50.9`	Heart failure, unspecified	Left ventriculography and hemodynamic measurements assess LV function and filling pressures in heart failure.
`Z95.1`	Presence of aortocoronary bypass graft	Indicates prior CABG and directs selective graft angiography during the procedure.
`I27.20`	Pulmonary hypertension, unspecified	May prompt right heart catheterization and vasoreactivity testing during the procedure.
`R07.9`	Chest pain, unspecified	Symptom-level diagnosis that frequently accompanies initial evaluation leading to coronary angiography.
`I42.0`	Dilated cardiomyopathy	Left ventriculography and hemodynamics help evaluate cardiomyopathy severity and etiology.

CPT Code	Description	Relationship to This Procedure
`93454`	Catheter placement in coronary artery(s) for coronary angiography, initial vessel, including intraprocedural injections for coronary angiography, imaging supervision and interpretation	Core diagnostic coronary angiography code often combined or compared with the HCPCS-level service; documents the imaging/interpretation for coronary arteries.
`93461`	Combined right and left heart catheterization including intraprocedural injections for left ventriculography, when performed; hemodynamic measurements and assessments	Captures the combined right and left heart catheterization and hemodynamic assessments that are components of the HCPCS description.
`93565`	Selective catheterization of coronary bypass graft(s) for angiography, with imaging supervision and interpretation	Describes selective catheterization and angiography of bypass grafts; used when graft imaging is performed selectively.
`93571`	Inhaled nitric oxide pulmonary vasoreactivity testing during cardiac catheterization	Represents inhaled nitric oxide administration and assessment during catheterization when pulmonary vasodilator testing is performed.
`93527`	Right heart catheterization including measurement(s) of pulmonary artery pressure and cardiac output	Captures the right heart hemodynamic measurement component when performed separately or as part of combined studies.

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