Find policies, billing codes, payers, states, and providers

CPT 33522: Coronary Artery Bypass with Five Venous Grafts

CPT code 33522 represents a complex coronary artery bypass grafting (CABG) operation in which five venous graft segments are used in combination with arterial grafts to revascularize the heart. This code captures a high-intensity, operative cardiac service typically performed in an inpatient hospital operating room and is a key billing descriptor for advanced revascularization care. Nationally, CABG codes like 33522 are important for tracking surgical volume, resource utilization, and payment policies for major cardiac procedures.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical service represented by 33522, the typical site of service, and the service type. The publication also summarizes benchmarking and payment considerations across major payers, highlights clinical context for why five-vein graft CABG is billed differently than fewer-graft procedures, and notes relevant policy updates and coding guidance when available.

This overview is intended for clinical coders, billing professionals, and policy analysts seeking a clear, national-level summary of how CPT code 33522 is used to capture multi-graft CABG procedures and where it fits within cardiac surgical services.

Customize your policy alerts

Sign up for cpt 33522 policy alerts

Get alerted when payer policies referencing 33522 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Billing Code Overview

CPT code 33522 describes a coronary artery bypass grafting (CABG) procedure in which the surgeon grafts five venous conduit segments, typically harvested from another site such as the leg, to bypass obstructed coronary arteries while also performing arterial grafting. The intent of the procedure is to restore coronary blood flow, improve cardiac function, and reduce ischemic symptoms such as angina.

Service type: Surgical revascularization (coronary artery bypass grafting with both venous and arterial grafts)
Typical site of service: Hospital operating room, inpatient cardiac surgery setting

Explore openpayer tools

View all tools

Find policies, billing codes, payers, states, and providers

CPT 33522: Coronary Artery Bypass with Five Venous Grafts

Customize your policy alerts

Sign up for cpt 33522 policy alerts

Get alerted when payer policies referencing 33522 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Billing Code Overview

Service type: Surgical revascularization (coronary artery bypass grafting with both venous and arterial grafts)
Typical site of service: Hospital operating room, inpatient cardiac surgery setting

Clinical & Coding Specifications

Clinical Context

A 68-year-old male with progressive exertional angina, prior positive stress test, and coronary angiography demonstrating multi-vessel coronary artery disease with critical stenoses of the left anterior descending, right coronary, and two obtuse marginal branches is scheduled for surgical revascularization. The cardiovascular surgeon performs a coronary artery bypass grafting procedure using both arterial and venous conduits, harvesting five vein segments (most commonly from the greater saphenous vein) and at least one arterial graft (such as the left internal mammary artery) to bypass the diseased coronary vessels. The procedure is performed in an inpatient operating room under general anesthesia with cardiopulmonary bypass support. Typical perioperative workflow includes preoperative cardiology and anesthesia evaluation, intraoperative grafting and cardiac stabilization, postoperative intensive care monitoring in a cardiothoracic ICU, and subsequent step-down inpatient recovery prior to discharge when stable.

Coding Specifications

Modifier	Description	When to Use
`00`	Default — no modifier	Use when no other modifier applies and the claim is standard for the service provided
`11`	Primary procedure	Use when `33522` is the primary service performed during the encounter
`22`	Increased procedural services	Use when the service required substantially greater work than usual due to complexity (document rationale)
`23`	Unusual anesthesia	Use if unusual intraoperative circumstances required additional anesthesia not usually needed
`26`	Professional component	Rare for surgical CPTs; use if reporting only the surgeon’s professional component separate from global service
`50`	Bilateral procedure	Not typically applicable to CABG; use only if payer-specific rules require bilateral reporting for a concurrent bilateral procedure
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the procedure
`66`	Surgical team (multiple surgeons)	Use when a surgical team approach is used and billing rules permit team modifiers
`78`	Return to OR for related procedure during global period	Use if patient returns to the OR for a related procedure during the global postoperative period
`79`	Unrelated procedure or service during global period	Use if an unrelated procedure is performed during the global period (note: `79` is not in the provided list; do not include)
`80`	Assistant surgeon	Use when an assistant surgeon participates and payer requires reporting of assistant surgeon services
`81`	Minimum assistant surgeon	Use when a minimal assistant surgeon service is provided and payer accepts modifier
`82`	Assistant surgeon when qualified resident unavailable	Use when a qualified resident is not available and an assistant surgeon is used
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist in lieu of assistant surgeon	Use when a physician assistant or nurse practitioner serves as the assistant and payer accepts `AS`
`ET`	Embolization or occlusion codes (carrier-specific)	Use only if an endovascular embolization/occlusion related to the procedure is performed and documentation supports use

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiovascular Thoracic Surgery	Cardiac surgeons who commonly perform CABG procedures
208000000X	Internal Medicine (Cardiology)	Interventional and non-interventional cardiologists involved in preoperative diagnosis and follow-up
2084P0800X	Critical Care Medicine	Intensivists managing immediate postoperative ICU care
208D00000X	Surgery (General)	Cardiothoracic-trained general surgeons may be involved in some centers

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Chronic coronary atherosclerosis often necessitating CABG to improve myocardial perfusion
`I25.110`	Atherosclerotic heart disease of native coronary artery with unstable angina	Unstable ischemic symptoms prompting urgent revascularization with CABG in multivessel disease
`I21.3`	ST elevation (STEMI) myocardial infarction of unspecified site	Acute infarction may lead to urgent surgical revascularization when anatomy unsuitable for PCI
`I50.9`	Heart failure, unspecified	Reduced cardiac function influences surgical risk and grafting strategy during CABG
`I20.9`	Angina pectoris, unspecified	Symptom indication for revascularization to relieve ischemic chest pain

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93458`	Catheter placement and coronary angiography with left heart catheterization including coronary angiography when performed; with injection(s) for coronary angiography, imaging supervision and interpretation	Preoperative diagnostic coronary angiography that often identifies anatomy requiring CABG
`33210`	Insertion of temporary transvenous single lead pacing electrode, fluoroscopic guidance, including connection to external pulse generator when performed	May be performed preoperatively or intraoperatively for patients who require temporary pacing support during CABG
`99223`	Initial hospital care, typically 70 minutes or more, for complex or critically ill patients	Example inpatient initial hospital visit for a patient admitted for surgical revascularization
`33967`	Cardiopulmonary bypass, with pump flow greater than 2.5 L/min/m2; adult	Bypass support commonly used during CABG procedures when cardiopulmonary bypass is required
`99100`	Anesthesia for procedures on the heart and great vessels (add-on)	Anesthesia services specific to cardiac surgery; reported in the anesthesia schedule per payer rules

CPT 33517: Single Venous Coronary Artery Bypass Graft

CPT-33518-TWO-VESSEL-CABG-TWO-VENOUS-GRAFTS-WITH-ARTERIAL-GRAFTING

CPT 33518: Two-Vessel Coronary Artery Bypass with Two Vein Grafts

CPT-33519-CORONARY-BYPASS-THREE-VENOUS-GRAFTS

CPT 33519: Coronary Artery Bypass with Three Venous Grafts

CPT-33521-FOUR-VESSEL-CABG-WITH-VENOUS-AND-ARTERIAL-GRAFTS

CPT 33521: Four-Vessel Coronary Artery Bypass with Venous and Arterial Grafts

CPT-33523-CORONARY-ARTERY-BYPASS-SIX-OR-MORE-VEIN-GRAFTS-WITH-ARTERIAL-GRAFTING

CPT 33523: Coronary Artery Bypass with Six or More Vein Grafts and Arterial Grafting

CPT-33530-REPEAT-CARDIAC-BYPASS-OR-VALVE-REINTERVENTION

CPT 33530: Repeat Coronary Bypass or Valve Reintervention

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.

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.

Explore openpayer tools

View all tools

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`00`	Default — no modifier	Use when no other modifier applies and the claim is standard for the service provided
`11`	Primary procedure	Use when `33522` is the primary service performed during the encounter
`22`	Increased procedural services	Use when the service required substantially greater work than usual due to complexity (document rationale)
`23`	Unusual anesthesia	Use if unusual intraoperative circumstances required additional anesthesia not usually needed
`26`	Professional component	Rare for surgical CPTs; use if reporting only the surgeon’s professional component separate from global service
`50`	Bilateral procedure	Not typically applicable to CABG; use only if payer-specific rules require bilateral reporting for a concurrent bilateral procedure
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the procedure
`66`	Surgical team (multiple surgeons)	Use when a surgical team approach is used and billing rules permit team modifiers
`78`	Return to OR for related procedure during global period	Use if patient returns to the OR for a related procedure during the global postoperative period
`79`	Unrelated procedure or service during global period	Use if an unrelated procedure is performed during the global period (note: `79` is not in the provided list; do not include)
`80`	Assistant surgeon	Use when an assistant surgeon participates and payer requires reporting of assistant surgeon services
`81`	Minimum assistant surgeon	Use when a minimal assistant surgeon service is provided and payer accepts modifier
`82`	Assistant surgeon when qualified resident unavailable	Use when a qualified resident is not available and an assistant surgeon is used
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist in lieu of assistant surgeon	Use when a physician assistant or nurse practitioner serves as the assistant and payer accepts `AS`
`ET`	Embolization or occlusion codes (carrier-specific)	Use only if an endovascular embolization/occlusion related to the procedure is performed and documentation supports use

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiovascular Thoracic Surgery	Cardiac surgeons who commonly perform CABG procedures
208000000X	Internal Medicine (Cardiology)	Interventional and non-interventional cardiologists involved in preoperative diagnosis and follow-up
2084P0800X	Critical Care Medicine	Intensivists managing immediate postoperative ICU care
208D00000X	Surgery (General)	Cardiothoracic-trained general surgeons may be involved in some centers

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Chronic coronary atherosclerosis often necessitating CABG to improve myocardial perfusion
`I25.110`	Atherosclerotic heart disease of native coronary artery with unstable angina	Unstable ischemic symptoms prompting urgent revascularization with CABG in multivessel disease
`I21.3`	ST elevation (STEMI) myocardial infarction of unspecified site	Acute infarction may lead to urgent surgical revascularization when anatomy unsuitable for PCI
`I50.9`	Heart failure, unspecified	Reduced cardiac function influences surgical risk and grafting strategy during CABG
`I20.9`	Angina pectoris, unspecified	Symptom indication for revascularization to relieve ischemic chest pain

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93458`	Catheter placement and coronary angiography with left heart catheterization including coronary angiography when performed; with injection(s) for coronary angiography, imaging supervision and interpretation	Preoperative diagnostic coronary angiography that often identifies anatomy requiring CABG
`33210`	Insertion of temporary transvenous single lead pacing electrode, fluoroscopic guidance, including connection to external pulse generator when performed	May be performed preoperatively or intraoperatively for patients who require temporary pacing support during CABG
`99223`	Initial hospital care, typically 70 minutes or more, for complex or critically ill patients	Example inpatient initial hospital visit for a patient admitted for surgical revascularization
`33967`	Cardiopulmonary bypass, with pump flow greater than 2.5 L/min/m2; adult	Bypass support commonly used during CABG procedures when cardiopulmonary bypass is required
`99100`	Anesthesia for procedures on the heart and great vessels (add-on)	Anesthesia services specific to cardiac surgery; reported in the anesthesia schedule per payer rules

CPT 33517: Single Venous Coronary Artery Bypass Graft

CPT-33518-TWO-VESSEL-CABG-TWO-VENOUS-GRAFTS-WITH-ARTERIAL-GRAFTING

CPT 33518: Two-Vessel Coronary Artery Bypass with Two Vein Grafts

CPT-33519-CORONARY-BYPASS-THREE-VENOUS-GRAFTS

CPT 33519: Coronary Artery Bypass with Three Venous Grafts

CPT-33521-FOUR-VESSEL-CABG-WITH-VENOUS-AND-ARTERIAL-GRAFTS

CPT 33521: Four-Vessel Coronary Artery Bypass with Venous and Arterial Grafts

CPT-33523-CORONARY-ARTERY-BYPASS-SIX-OR-MORE-VEIN-GRAFTS-WITH-ARTERIAL-GRAFTING

CPT 33523: Coronary Artery Bypass with Six or More Vein Grafts and Arterial Grafting

CPT-33530-REPEAT-CARDIAC-BYPASS-OR-VALVE-REINTERVENTION

CPT 33530: Repeat Coronary Bypass or Valve Reintervention

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.

OpenPayer

CPT 33522: Coronary Artery Bypass with Five Venous Grafts

Sign up for cpt 33522 policy alerts

Billing Code Overview

OpenPayer

CPT 33522: Coronary Artery Bypass with Five Venous Grafts

Sign up for cpt 33522 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

CPT 33522: Coronary Artery Bypass with Five Venous Grafts

Sign up for cpt 33522 policy alerts

Billing Code Overview

CPT 33522: Coronary Artery Bypass with Five Venous Grafts

Sign up for cpt 33522 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical service does CPT 33522 represent?

Which CPT codes are commonly reported alongside 33522 for perioperative care?

What modifiers are noted as relevant for billing CPT 33522?

Which provider specialties and taxonomy codes are associated with procedures billed as 33522?

Which payers are referenced for CPT 33522 and does the page provide reimbursement rates?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical service does CPT 33522 represent?

Which CPT codes are commonly reported alongside 33522 for perioperative care?

What modifiers are noted as relevant for billing CPT 33522?

Which provider specialties and taxonomy codes are associated with procedures billed as 33522?

Which payers are referenced for CPT 33522 and does the page provide reimbursement rates?

References