Coding Clarification: Reporting Transcatheter Intracardiac Shunt Creation (33745, 33746)

September 2025 page 10 Coding Clarification: Reporting Transcatheter Intracardiac Shunt Creation (33745, 33746) Codes 33745 and 33746 were established for the CPT 2019 code set to report transcatheter intracardiac shunt (TIS) creation by stent placement to improve effective intracardiac blood flow in patients with congenital cardiac anomalies. These codes differ from code 33741, Transcatheter atrial septostomy (TAS) for congenital cardiac anomalies to create effective atrial flow, including all imaging guidance by the proceduralist, when performed, any method (eg, Rashkind, Sang-Park, balloon, cutting balloon, blade), which is used to report transcatheter atrial septostomy, a procedure that creates an intracardiac shunt...

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Note:  The following article synopsis was NOT provided by the AMA. It was created by Find-A-Code/innoviHealth.

Article Overview

This coding clarification article addresses transcatheter intracardiac shunt creation in the context of congenital cardiology. It is designed for coding professionals, clinicians, and revenue cycle staff who need to understand the scope of the CPT guidance, the relationship between the shunt-creation codes and a related atrial septostomy code, and the kinds of clinical scenarios and procedural setups discussed in the article. The article also includes clinical examples and procedural descriptions that illustrate the reported services in typical congenital heart disease settings.

Why This Topic Matters

Accurate reporting of congenital cardiac catheterization procedures depends on understanding how the guidance distinguishes related transcatheter interventions and the clinical settings in which they are discussed. This article helps readers orient to the intended use of the codes and the broader procedural context covered by the clarification.

Article Sections

  1. Cardiovascular System

    Overview of the CPT cardiovascular topic area addressed by the clarification. Introduces the relevant intracardiac shunt creation services and the related atrial septostomy discussion.

  2. Clinical Example (33745) / Description of Procedure (33745)

    A representative congenital heart disease scenario and associated procedural narrative for the first shunt-creation code. Covers the kind of catheter-based workflow discussed in the clarification.

  3. Clinical Example (33746) / Description of Procedure (33746)

    A second representative scenario and procedural narrative focused on an additional intracardiac shunt location. Shows the broader context for the add-on service discussed in the article.

What You Will Learn

  • The general purpose of the transcatheter intracardiac shunt creation clarification
  • How the article frames the relationship between the shunt-creation service and a related atrial septostomy service
  • The congenital cardiology scenarios discussed in the clarification
  • The types of procedural contexts illustrated by the clinical examples and descriptions

Who Should Read This

  • Medical coders
  • Coding auditors
  • Cardiology practices
  • Hospital outpatient coding teams
  • Revenue cycle professionals
  • Congenital heart disease clinicians

Codes Discussed


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