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CPT 93799: Unlisted Cardiovascular Procedure

CPT code 93799 designates unlisted cardiovascular services or procedures used when a specific CPT code is not available. It captures new, unusual, or otherwise unclassified cardiovascular interventions and is an important billing mechanism for reporting novel techniques, device trials, or bespoke procedures. Nationally, 93799 matters because it supports coding flexibility for cardiovascular innovation while requiring clear documentation to justify medical necessity and the specifics of the service provided.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of payer coverage patterns, documentation expectations, and common billing considerations related to unlisted cardiovascular procedures. The publication outlines benchmarks for utilization where available, summarizes policy considerations payers typically apply to unlisted cardiovascular codes, and places the code in clinical context for cardiovascular service lines.

This summary equips billing managers, coding professionals, and policy analysts with an understanding of when 93799 is used, the payers commonly involved, and the types of information payers and auditors expect to support claims for unlisted cardiovascular procedures. Data not available in the input is noted where detail is lacking.

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Billing Code Overview

CPT code 93799 is an unlisted cardiovascular service or procedure code used to report new or unusual cardiovascular procedures that do not have an assigned CPT code. The code is intended for services that fall within the cardiovascular service category but are not described by existing, specific CPT codes.

Service type: Cardiovascular procedure — unlisted/new or unusual service

Typical site of service: Hospital outpatient department, ambulatory surgical center, office, or other facility where cardiovascular procedures are performed

Data not available in the input.

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CPT 93799: Unlisted Cardiovascular Procedure

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Get alerted when payer policies referencing 93799 are released or updated.

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Billing Code Overview

Service type: Cardiovascular procedure — unlisted/new or unusual service

Typical site of service: Hospital outpatient department, ambulatory surgical center, office, or other facility where cardiovascular procedures are performed

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 68-year-old male with ischemic cardiomyopathy and complex peripheral vascular anatomy is scheduled for an unconventional cardiovascular procedure developed at a tertiary care center: percutaneous transcatheter valve repair using a novel device under fluoroscopic and echocardiographic guidance. The patient has multiple prior sternotomies and a high surgical risk score, so the heart team elects a nonstandard transcatheter approach that is not yet assigned a specific CPT code. Pre-procedure evaluation includes history and physical, review of prior imaging, informed consent specific to an unlisted service, and coordination between cardiology, interventional cardiology, echocardiography, and anesthesiology.

On the day of service the patient receives monitored anesthesia care with intra-procedural transesophageal echocardiography. The interventional cardiology team performs device implantation, repeated hemodynamic measurements, and adjunctive angiography. The procedure requires additional time and technical effort because of anomalous vascular access and custom device deployment. Documentation includes detailed operative report describing indications, stepwise technique, intra-procedural findings, total time, devices used, and rationale for reporting an unlisted cardiovascular service using 93799. A complete billing submission includes a concise comparative report describing why existing CPT codes do not describe the service and supporting intraoperative images and time logs.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the work, time, or technical difficulty substantially exceeds typical for comparable CPT codes; support with operative report and time logs.
`26`	Professional component	Use when reporting only the physician interpretation portion of a procedure (eg, physician reads interventional imaging separate from facility technical component).
`51`	Multiple procedures	Use when `93799` is billed in addition to other distinct procedures on the same date; facility or payer rules may require modifier application.
`52`	Reduced services	Use when the procedure was started but not completed or was performed at a reduced level of service.
`59`	Distinct procedural service	Use to indicate a separate and distinct service from other procedures performed on the same day (avoid overuse; document clear anatomic or temporal separation).
`62`	Co-surgery by two surgeons	Use when two surgeons of different specialties perform shared operative responsibilities concurrently.
`66`	Surgical team (team approach)	Use when a coordinated surgical team approach is documented and required for the procedure.
`77`	Repeat procedure by another physician	Use when an independent physician repeats the procedure later the same day or during the same encounter.
`78`	Return to OR for related procedure during global period	Use when an unplanned return to the operating room occurs for a related procedure during the global surgical period.
`80`	Assistant surgeon	Use when an assistant surgeon provides surgical assistance and billing rules permit an assistant modifier.
`81`	Minimum assistant surgeon	Use when a minimum assistance level is documented and allowable.
`AS`	Ambulatory surgical center (ASC) facility service	Use when `93799` is performed in an ASC setting to identify facility-specific billing.
`TC`	Technical component	Use when billing only the facility or technical component of the procedure (eg, imaging equipment and technical staff).
`59`	Distinct procedural service (note: listed again for emphasis)	Use when services are separate by site, session, or organ system; document separation carefully.

Taxonomy Code	Specialty	Notes
`207RC0000X`	Interventional Cardiology	Interventional cardiologists most commonly perform novel percutaneous cardiovascular procedures.
`207RI0001X`	Cardiovascular Disease	General cardiologists involved in pre- and post-procedure management and echocardiographic interpretation.
`207L00000X`	Anesthesiology	Provides monitored anesthesia care or general anesthesia support for high-risk cardiovascular interventions.
`208600000X`	Cardiothoracic Surgery	May be involved in hybrid or rescue surgical components when a device or approach is novel.
`363A00000X`	Vascular Surgery	Participates when complex vascular access or hybrid endovascular techniques are required.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93458`	Catheter placement in coronary or pulmonary artery for injection of contrast and for hemodynamic measurements (including left and right heart catheterization when performed)	Often performed before or during novel transcatheter procedures for baseline hemodynamics and angiography.
`93580`	Transcatheter therapy, mitral valve, percutaneous approach including imaging and implant when performed	Standard code for mitral transcatheter therapy; a novel device or technique that lacks an assigned code may be reported with `93799` instead.
`93312`	Transesophageal echocardiography, real-time with image documentation, including Doppler, intraoperative	Provides intra-procedural imaging guidance; billed separately when echocardiography is performed by another provider.
`99291`	Critical care, evaluation and management of the critically ill patient; first 30-74 minutes	May be reported when the patient requires continuous physician critical care management related to the complex procedure.
`94002`	Ventilation assist and management, initiation of pressure or volume preset ventilator for patients (not commonly primary)	May be used if mechanical ventilation is initiated intra-procedurally in hybrid OR settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Underlying coronary disease often coexists and complicates planning for novel cardiovascular interventions.
`I50.22`	Chronic systolic (congestive) heart failure	Common indication for advanced transcatheter valve or structural interventions in high-risk surgical patients.
`I34.0`	Nonrheumatic mitral (valve) insufficiency	Structural valve disease that may prompt unlisted valve repair approaches when standard codes do not apply.
`I35.0`	Nonrheumatic aortic (valve) stenosis	Severe valvular disease that can necessitate novel transcatheter repairs in patients unsuitable for standard valves.
`I80.2`	Phlebitis and thrombophlebitis of other deep vessels of lower extremities	Relevant when venous access issues or thrombosis complicate vascular access planning for procedures.

CPT 93797: Supervised Cardiac Rehabilitation with Dietary Review

CPT-93798-SUPERVISED-EXERCISE-CONTINUOUS-ECG-DIET-REVIEW

CPT 93798: Supervised Exercise with Continuous ECG Monitoring and Diet Review

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the work, time, or technical difficulty substantially exceeds typical for comparable CPT codes; support with operative report and time logs.
`26`	Professional component	Use when reporting only the physician interpretation portion of a procedure (eg, physician reads interventional imaging separate from facility technical component).
`51`	Multiple procedures	Use when `93799` is billed in addition to other distinct procedures on the same date; facility or payer rules may require modifier application.
`52`	Reduced services	Use when the procedure was started but not completed or was performed at a reduced level of service.
`59`	Distinct procedural service	Use to indicate a separate and distinct service from other procedures performed on the same day (avoid overuse; document clear anatomic or temporal separation).
`62`	Co-surgery by two surgeons	Use when two surgeons of different specialties perform shared operative responsibilities concurrently.
`66`	Surgical team (team approach)	Use when a coordinated surgical team approach is documented and required for the procedure.
`77`	Repeat procedure by another physician	Use when an independent physician repeats the procedure later the same day or during the same encounter.
`78`	Return to OR for related procedure during global period	Use when an unplanned return to the operating room occurs for a related procedure during the global surgical period.
`80`	Assistant surgeon	Use when an assistant surgeon provides surgical assistance and billing rules permit an assistant modifier.
`81`	Minimum assistant surgeon	Use when a minimum assistance level is documented and allowable.
`AS`	Ambulatory surgical center (ASC) facility service	Use when `93799` is performed in an ASC setting to identify facility-specific billing.
`TC`	Technical component	Use when billing only the facility or technical component of the procedure (eg, imaging equipment and technical staff).
`59`	Distinct procedural service (note: listed again for emphasis)	Use when services are separate by site, session, or organ system; document separation carefully.

Taxonomy Code	Specialty	Notes
`207RC0000X`	Interventional Cardiology	Interventional cardiologists most commonly perform novel percutaneous cardiovascular procedures.
`207RI0001X`	Cardiovascular Disease	General cardiologists involved in pre- and post-procedure management and echocardiographic interpretation.
`207L00000X`	Anesthesiology	Provides monitored anesthesia care or general anesthesia support for high-risk cardiovascular interventions.
`208600000X`	Cardiothoracic Surgery	May be involved in hybrid or rescue surgical components when a device or approach is novel.
`363A00000X`	Vascular Surgery	Participates when complex vascular access or hybrid endovascular techniques are required.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93458`	Catheter placement in coronary or pulmonary artery for injection of contrast and for hemodynamic measurements (including left and right heart catheterization when performed)	Often performed before or during novel transcatheter procedures for baseline hemodynamics and angiography.
`93580`	Transcatheter therapy, mitral valve, percutaneous approach including imaging and implant when performed	Standard code for mitral transcatheter therapy; a novel device or technique that lacks an assigned code may be reported with `93799` instead.
`93312`	Transesophageal echocardiography, real-time with image documentation, including Doppler, intraoperative	Provides intra-procedural imaging guidance; billed separately when echocardiography is performed by another provider.
`99291`	Critical care, evaluation and management of the critically ill patient; first 30-74 minutes	May be reported when the patient requires continuous physician critical care management related to the complex procedure.
`94002`	Ventilation assist and management, initiation of pressure or volume preset ventilator for patients (not commonly primary)	May be used if mechanical ventilation is initiated intra-procedurally in hybrid OR settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Underlying coronary disease often coexists and complicates planning for novel cardiovascular interventions.
`I50.22`	Chronic systolic (congestive) heart failure	Common indication for advanced transcatheter valve or structural interventions in high-risk surgical patients.
`I34.0`	Nonrheumatic mitral (valve) insufficiency	Structural valve disease that may prompt unlisted valve repair approaches when standard codes do not apply.
`I35.0`	Nonrheumatic aortic (valve) stenosis	Severe valvular disease that can necessitate novel transcatheter repairs in patients unsuitable for standard valves.
`I80.2`	Phlebitis and thrombophlebitis of other deep vessels of lower extremities	Relevant when venous access issues or thrombosis complicate vascular access planning for procedures.

CPT 93797: Supervised Cardiac Rehabilitation with Dietary Review

CPT-93798-SUPERVISED-EXERCISE-CONTINUOUS-ECG-DIET-REVIEW

CPT 93798: Supervised Exercise with Continuous ECG Monitoring and Diet Review

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 93799: Unlisted Cardiovascular Procedure

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Billing Code Overview

OpenPayer

CPT 93799: Unlisted Cardiovascular Procedure

Sign up for cpt 93799 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related CPT Codes

Related Diagnoses

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related CPT Codes

Related Diagnoses

Related Codes

References

CPT 93799: Unlisted Cardiovascular Procedure

Sign up for cpt 93799 policy alerts

Billing Code Overview

CPT 93799: Unlisted Cardiovascular Procedure

Sign up for cpt 93799 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related CPT Codes

Related Diagnoses

Related Codes

What types of procedures should be reported with CPT 93799?

What documentation is expected when submitting a claim with 93799?

Which modifiers are commonly used with 93799 and when are they applied?

How does 93799 relate to other cardiovascular CPT codes like 93580 or 93312?

Which payers are commonly involved and what do payers expect for 93799 claims?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related CPT Codes

Related Diagnoses

Related Codes

What types of procedures should be reported with CPT 93799?

What documentation is expected when submitting a claim with 93799?

Which modifiers are commonly used with 93799 and when are they applied?

How does 93799 relate to other cardiovascular CPT codes like 93580 or 93312?

Which payers are commonly involved and what do payers expect for 93799 claims?

References