CPT Code Overview

CPT 93452 describes a left heart catheterization procedure that includes intraprocedural injection(s) for left ventriculography along with imaging supervision and interpretation when performed. This code applies to diagnostic and evaluative catheter-based access to the left-sided cardiac chambers with concurrent contrast injection to visualize ventricular function.

Service Type: Cardiology / Cardiac Catheterization

Typical Site of Service: Hospital outpatient (e.g., Outpatient facility, POS 19/22) or Inpatient hospital (POS 21)

Clinical Context

A 62-year-old patient is admitted to the hospital with signs of acute heart failure and suspected ischemic cardiomyopathy. After initial evaluation including ECG, cardiac biomarkers, and transthoracic echocardiography demonstrating reduced left ventricular function, the cardiology team schedules a left heart catheterization with left ventriculography to define coronary anatomy and assess left ventricular systolic function. The procedure is performed in the cardiac catheterization laboratory in a hospital outpatient setting (POS 19/22) or during an inpatient admission (POS 21). Vascular access is obtained (typically via femoral or radial artery), a left-sided diagnostic catheter is advanced to the left coronary ostium for coronary angiography, and contrast is injected for left ventriculography with imaging supervision and interpretation documented in the procedural report.

Coding Specifications

Modifier 26 is used when only the professional component (physician interpretation and report) is billed separately.

Modifier TC is used when only the technical component (facility, equipment, technologist) is billed.

Modifier 59 is used to indicate a distinct procedural service when another procedure performed on the same day is not typically reported together.

• Associated provider taxonomies:

The taxonomy 246XC2901X represents clinical personnel who perform and assist with invasive cardiovascular procedures in the catheterization laboratory, supporting imaging acquisition and device handling.

Related Diagnoses

• A39.50 — Meningococcal carditis, unspecified

  Clinical relevance: Infectious involvement of cardiac structures may prompt diagnostic catheterization and ventriculography when structural dysfunction or hemodynamic compromise is suspected.

• A39.51 — Meningococcal endocarditis

  Clinical relevance: Endocarditis with suspected valvular involvement can lead to hemodynamic instability or embolic risk that may necessitate catheterization for assessment.

• A39.52 — Meningococcal myocarditis

  Clinical relevance: Myocardial inflammation affecting ventricular function can be evaluated with left ventriculography to quantify systolic performance.

• A52.02 — Syphilitic aortitis

  Clinical relevance: Aortitis with possible aortic root or valve involvement may require invasive imaging during cardiac catheterization.

• A52.03 — Syphilitic endocarditis

  Clinical relevance: Valvular infection or dysfunction associated with syphilis can prompt invasive assessment.

• A52.06 — Other syphilitic heart involvement

  Clinical relevance: Other cardiac manifestations of syphilis that affect structure or function may be assessed during left heart catheterization.

• A54.83 — Gonococcal heart infection

  Clinical relevance: Infectious cardiac disease with suspected structural compromise may lead to invasive diagnostic procedures.

• A78 — Q fever

  Clinical relevance: Q fever can involve endocardium or myocardium; invasive evaluation may be indicated for structural assessment.

• B33.20 — Viral carditis, unspecified

  Clinical relevance: Viral inflammation of the heart with ventricular dysfunction can be evaluated with ventriculography during catheterization.

• B33.21 — Viral endocarditis

  Clinical relevance: Viral infection of valves may prompt invasive assessment for hemodynamic impact.

• B33.22 — Viral myocarditis

  Clinical relevance: Myocarditis affecting left ventricular function is a reason for left ventriculography to document ejection fraction.

• B37.6 — Candidal endocarditis

  Clinical relevance: Fungal endocarditis with suspected valvular damage can necessitate catheterization for assessment.

• B57.0 — Acute Chagas' disease with heart involvement

  Clinical relevance: Acute Chagas myocarditis/endocarditis causing ventricular dysfunction may be evaluated invasively.

• B57.2 — Chagas' disease (chronic) with heart involvement

  Clinical relevance: Chronic Chagas cardiomyopathy with left ventricular dysfunction is assessed with ventriculography.

• C38.0 — Malignant neoplasm of heart

  Clinical relevance: Cardiac tumors affecting chamber size or function may be assessed during catheterization.

• C45.2 — Mesothelioma of pericardium

  Clinical relevance: Pericardial involvement with hemodynamic effects may prompt invasive assessment.

• D15.1 — Benign neoplasm of heart

  Clinical relevance: Benign cardiac masses with functional impact can be evaluated with left ventriculography.

• D86.0 — Sarcoidosis of lung

  Clinical relevance: Systemic sarcoidosis with potential cardiac involvement can lead to invasive assessment of ventricular function.

• D86.1 — Sarcoidosis of lymph nodes

  Clinical relevance: Sarcoidosis with possible cardiac infiltration may prompt ventriculographic evaluation.

• D86.2 — Sarcoidosis of lung with sarcoidosis of lymph nodes

  Clinical relevance: Combined involvement raises suspicion for cardiac sarcoidosis and need for functional assessment.

• D86.3 — Sarcoidosis of skin

  Clinical relevance: Cutaneous sarcoidosis as part of systemic disease may be associated with cardiac involvement requiring evaluation.

• D86.81 — Sarcoid meningitis

  Clinical relevance: Neurologic sarcoidosis as part of systemic disease can be associated with cardiac involvement warranting assessment.

Related CPT Codes

93462 is an add‑on for transeptal or transapical access when those additional left heart access techniques are performed in conjunction with the primary left heart catheterization. 93566, 93567, and 93568 are add‑on angiographic studies that may be performed during the same catheterization session to image the right atrium, supravalvular aorta, or pulmonary circulation respectively. These add‑on codes are commonly reported together with 93452 when the additional angiographic studies are performed during the same procedure; they are not alternatives to 93452 but supplemental codes.

National mean commercial rates for CPT 93452 are materially higher than Medicare. The BUCA composite (average commercial) mean of $857.16 exceeds the Medicare mean of $606.52 by $250.64, reflecting higher allowed amounts in the commercial market compared with the Medicare locality-based mean.

Dispersion varies by payer: Blue Cross Blue Shield and BUCA display the widest interquartile ranges (BCBS P75−P25 = $398.67; BUCA P75−P25 = $360.64), indicating greater spread in allowed rates. Aetna and Medicare are among the tightest (Aetna P75−P25 = $182.00; Medicare P75−P25 = $610.50, noting Medicare's P25 is much lower and reflects locality variation), while Cigna and UnitedHealth Group show substantial upper-tail values with P75−P25 of $498.40 and $505.50 respectively. The table and chart below present the full breakdown.