CPT Code Overview

CPT code 93455 is used to report imaging supervision and interpretation for catheter placement in a bypass graft, including injections for the assessment of coronary artery disease or stenosis. This procedure is a key component of cardiovascular diagnostic services, providing critical information for the evaluation and management of patients with suspected or known coronary artery disease. The typical site of service for this procedure is a hospital outpatient or inpatient setting, where the professional component is covered under Medicare Part B and the technical component under Part A.

Clinical Context

A patient with a history of coronary artery bypass graft surgery presents to the hospital with symptoms suggestive of acute coronary syndrome, such as chest pain or shortness of breath. The clinical team suspects possible graft stenosis or occlusion. The patient is admitted to either the inpatient or outpatient hospital setting. A cardiologist performs a diagnostic procedure to assess the patency and function of the bypass grafts. During the procedure, catheters are placed in the grafts, and contrast injections are administered. Imaging supervision and interpretation are performed to evaluate for coronary artery disease or stenosis within the grafts. The findings guide further management, such as medical therapy or potential intervention.

Coding Specifications

• Modifiers:

  • 26 – Professional Component: Used when reporting only the physician's supervision and interpretation of the imaging, not the technical aspect.

  • TC – Technical Component: Used when reporting only the technical aspect of the imaging service (equipment, supplies, and technical staff).

  • 59 – Distinct Procedural Service: Used to indicate that the procedure is distinct or independent from other services performed on the same day.

  • 51 – Multiple Procedures: Used when multiple procedures are performed during the same session.

• Provider Taxonomies:

  Taxonomy Code	Specialty Name
  207RC0000X	Cardiovascular Disease (Cardiology)

• Specialty Representation:

  • Cardiologists specializing in cardiovascular disease typically perform and interpret these procedures.

Related Diagnoses

• I21.9 – Acute myocardial infarction, unspecified

  • Relevant when a patient presents with symptoms of myocardial infarction and the exact location is not specified. Imaging of bypass grafts helps determine the cause and location of infarction.

• I21.A1 – STEMI of other anterior wall

  • Indicates a ST-elevation myocardial infarction affecting the anterior wall. Imaging supervision and interpretation of bypass grafts may be necessary to assess for graft patency or occlusion contributing to the infarct.

• I21.A9 – STEMI of unspecified site

  • Used when a ST-elevation myocardial infarction is diagnosed but the specific site is not identified. Imaging of bypass grafts assists in identifying the affected area and guiding treatment.

Related CPT Codes

• 93454 – Imaging supervision and interpretation for coronary angiography(s): Used for imaging of native coronary arteries; may be performed in conjunction with 93455 when both native vessels and grafts are assessed.

• 93456 – Imaging supervision and interpretation for coronary angiography with right heart catheterization: Includes right heart catheterization; may be used when hemodynamic assessment is required alongside graft imaging.

• 93457 – Imaging supervision and interpretation for left heart catheterization: Used when left heart catheterization is performed; may be combined with graft imaging.

• 93458 – Imaging supervision and interpretation for combined left and right heart catheterization: Used when both left and right heart catheterizations are performed; may be relevant in complex cases.

• 93459 – Imaging supervision and interpretation for other diagnostic cardiac catheterization: Used for other diagnostic catheterizations; may be an alternative or adjunct to 93455.

• 93460 – Imaging supervision and interpretation for coronary angiography in bypass grafts and native vessels: Used when both native vessels and bypass grafts are imaged; often performed together with 93455.

• 93461 – Imaging supervision and interpretation for coronary angiography with selective catheterization: Used when selective catheterization is required; may be performed in conjunction with graft imaging.

These codes are commonly used together or as alternatives depending on the clinical scenario and the extent of the diagnostic evaluation required.

Nationally, the mean rate for CPT code 93455 is highest among UnitedHealth Group and Cigna, both exceeding $1,160, while Medicare's mean rate is significantly lower at $677.55. The BUCA average commercial mean rate stands at $960.72, which is nearly 42% higher than the Medicare mean rate.

Rate dispersion varies notably across payers. Medicare shows the widest spread, with a difference of $665 between its 75th and 25th percentiles, indicating substantial variability in reimbursement. In contrast, Aetna has the tightest range, with only $233.17 separating its 75th and 25th percentiles. Blue Cross Blue Shield, Cigna, and UnitedHealth Group all exhibit moderate dispersion, with ranges between $519 and $558.

The table and chart below present a detailed breakdown of national mean rates and percentile values for each payer.