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CPT 35081: Open Abdominal Aortic Aneurysm Repair

CPT code 35081 denotes an open abdominal aortic procedure for repair of an abdominal aortic aneurysm or pseudoaneurysm via direct repair or graft placement. This is an important high-acuity vascular surgery code used in operative management of life- and limb-threatening aortic pathology. Nationally, it represents resource-intensive inpatient surgical care with implications for facility utilization, perioperative risk management, and bundle or episode payment models.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and service setting, typical billing and coding considerations, and benchmarking context where available. The publication outlines procedural classification, common modifiers used in surgical billing, and the role of this code within vascular surgical service lines.

The report provides clinical context for when open aortic repair is coded versus endovascular alternatives, summarizes payer considerations and common billing practices, and highlights areas where policy updates or payment model changes could affect utilization and reimbursement. Data not available in the input is noted where applicable.

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Billing Code Overview

CPT code 35081 describes an open abdominal procedure in which the provider makes an incision into the abdomen to access an aneurysm or pseudoaneurysm of the abdominal aorta and performs direct repair or places a graft at the repair site. This is a surgical vascular repair procedure that addresses focal pathology of the abdominal aorta.

Service type: Open surgical aortic repair
Typical site of service: Inpatient operating room or surgical suite with postoperative inpatient recovery

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

CPT 35081: Open Abdominal Aortic Aneurysm Repair

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Sign up for cpt 35081 policy alerts

Get alerted when payer policies referencing 35081 are released or updated.

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Billing Code Overview

Service type: Open surgical aortic repair
Typical site of service: Inpatient operating room or surgical suite with postoperative inpatient recovery

Clinical & Coding Specifications

Clinical Context

A 72-year-old male with a history of hypertension and smoking presents with progressive abdominal and back pain. Imaging with abdominal ultrasound followed by CT angiography demonstrates an infra-renal abdominal aortic aneurysm measuring 5.8 cm with a focal outpouching suspicious for impending rupture. The vascular surgery team evaluates the patient in the emergency setting, obtains informed consent, and coordinates transfer to the operating room for open repair. Under general anesthesia, the surgical team performs a midline transperitoneal abdominal incision to expose the abdominal aorta, clamps the aorta proximally and distally, excises or repairs the aneurysmal segment, and places a synthetic graft to re-establish aortic continuity. Postoperative care includes intensive monitoring for hemodynamic stability, assessment for renal perfusion, wound care, and imaging surveillance.

Typical clinical workflow:

Preoperative evaluation with CT angiography, cardiac and pulmonary risk assessment, and laboratory testing.
Anesthesia evaluation and preoperative consent with discussion of open aneurysm repair risks.
Operating room: midline abdominal incision, aortic exposure, direct aneurysm repair or graft placement, hemostasis, and layered closure.
Immediate postoperative period in PACU or ICU for hemodynamic monitoring, pain control, and organ function surveillance.
Follow-up with vascular surgery clinic and scheduled imaging surveillance for graft integrity and complication monitoring.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier — standard reporting	Use as the base claim line without an additional modifier when no special circumstance applies.
`11`	Office or outpatient E/M — (historical; modifier used in some payer systems)	Applied per payer policy when reporting global service or distinct visit components if required by the payor.
`22`	Increased procedural services	Use when the work required to perform `35081` is substantially greater than typically required (document rationale).
`23`	Unusual anesthesia — when a procedure is performed under general anesthesia but the anesthesia risk is unusually high	Use if the procedure is performed under general anesthesia with documented unusually high anesthesia risk that affects billing per payer rules.
`50`	Bilateral procedure	Use when bilateral simultaneous procedures are performed and payer requires explicit modifier for bilateral service reporting (rare for aortic repair).
`51`	Multiple procedures	Use when `35081` is reported in the same operative session with additional CPT-coded procedures to indicate multiple procedures were performed.
`52`	Reduced services	Use when a component of the procedure was intentionally not completed or was reduced; documentation must state limitation.
`53`	Discontinued procedure	Use if the procedure was started but terminated due to extenuating circumstances prior to completion.
`62`	Two surgeons — surgical team approach	Use when two surgeons with different specialties perform distinct portions of `35081` (co-surgery).
`63`	Procedure performed on infants or neonates — (payer-specific)	Generally not applicable for typical adult AAAs; included when documentation supports patient age-specific modifier use per payer rules.
`78`	Return to operating room for a related procedure during the postoperative period	Use when the patient returns to the OR for a related complication of the original `35081` within the global period.
`80`	Assistant surgeon	Use when an assistant surgeon provides assistance during `35081` and billing requires modifier to identify the assistant.
`81`	Minimum assistant surgeon	Use when minimal assistance is provided and payer requires the modifier to indicate level of assistance.
`82`	Assistant surgeon when qualified resident not available	Use when an assistant is required and no qualified resident is available; documents role of assistant.

Taxonomy Code	Specialty	Notes
`207RG0100X`	Vascular Surgery	Primary specialty performing open abdominal aortic aneurysm repair.
`207RH0000X`	Thoracic and Cardiac Surgery	May participate for complex aortic disease involving thoracoabdominal segments or hybrid procedures.
`207L00000X`	General Surgery	Some general surgeons with vascular training perform open aortic repairs in select centers.
`2080P0202X`	Anesthesiology	Provides general anesthesia and perioperative hemodynamic management for open aortic surgery.
`363LA2200X`	Critical Care Medicine	Manages immediate postoperative ICU care for major vascular surgery patients.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I71.3`	Abdominal aortic aneurysm, ruptured	Indicates an emergent scenario requiring open repair such as `35081`.
`I71.4`	Abdominal aortic aneurysm, without rupture	Common indication for elective or urgent open repair when size or symptoms meet intervention criteria.
`I71.8`	Other aortic aneurysm and dissection	Includes complex aortic pathology that may require open surgical repair depending on location and extent.
`I71.9`	Aortic aneurysm, unspecified	Used when documentation describes an aortic aneurysm requiring repair but specificity is limited.
`S35.0`	Injury of abdominal aorta	Traumatic injury to the abdominal aorta that may necessitate open repair or grafting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35081`	Direct repair or graft placement of abdominal aorta via laparotomy (open repair)	Primary procedure described: open abdominal aortic aneurysm repair with graft placement.
`36147`	Insertion of temporary intra-arterial shunt, with or without fluoroscopic guidance	May be performed to maintain distal perfusion during open aortic repair in complex cases.
`36200`	Introduction of catheter, arterial system; for diagnostic purposes	Used for intraoperative arterial access for angiography or blood pressure monitoring.
`36556`	Insertion of non-tunneled centrally inserted central venous catheter; age 5 years or older	Commonly placed perioperatively for central venous access and vasoactive infusions.
`36901`	Endovascular therapy, percutaneous, for iliac or femoral artery; initial treatment	Performed if adjunct endovascular procedures are required for distal iliac reconstruction or hybrid repair.
`99100`	Anesthesia for emergency procedures (add-on)	Used by anesthesiology per payer policy for emergent open aortic repair situations.

CPT 35001: Carotid or Subclavian Arterial Repair with Graft Placement

CPT-35002-CAROTID-SUBCLAVIAN-ARTERY-OPEN-REPAIR-ANEURYSM

CPT 35002: Open Repair of Carotid or Subclavian Artery Aneurysm

CPT-35005-VERTEBRAL-ARTERY-REPAIR-OR-GRAFT-PLACEMENT

CPT 35005: Vertebral Artery Repair or Graft Placement

CPT-35011-AXILLARY-BRACHIAL-ARTERY-ANEURYSM-REPAIR

CPT 35011: Axillary–Brachial Artery Aneurysm Repair

CPT-35013-AXILLARY-BRACHIAL-ARTERY-REPAIR-GRAFT

CPT 35013: Axillary–Brachial Artery Repair, Direct Repair or Graft

CPT-35021-SUBCLAVIAN-INNOMINATE-ARTERY-REPAIR-GRAFT

CPT 35021: Repair/Graft of Subclavian or Innominate Artery Aneurysm

CPT-35022-SUBCLAVIAN-INNOMINATE-ARTERY-OPEN-REPAIR-GRAFT

CPT 35022: Open Repair of Subclavian or Innominate Artery Aneurysm

CPT-35045-RADIAL-ULNAR-ARTERY-REPAIR-FOREARM

CPT 35045: Radial or Ulnar Artery Repair, Forearm

CPT-35082-OPEN-REPAIR-RUPTURED-ABDOMINAL-AORTIC-ANEURYSM

CPT 35082: Open Repair of Ruptured Abdominal Aortic Aneurysm

CPT-35091-OPEN-ABDOMINAL-AORTIC-ANEURYSM-REPAIR-OR-GRAFT

CPT 35091: Open Abdominal Aortic/Visceral Vessel Aneurysm Repair

Showing 1–10 of 23

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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.

Clinical & Coding Specifications

Clinical Context

Typical clinical workflow:

Preoperative evaluation with CT angiography, cardiac and pulmonary risk assessment, and laboratory testing.
Anesthesia evaluation and preoperative consent with discussion of open aneurysm repair risks.
Operating room: midline abdominal incision, aortic exposure, direct aneurysm repair or graft placement, hemostasis, and layered closure.
Immediate postoperative period in PACU or ICU for hemodynamic monitoring, pain control, and organ function surveillance.
Follow-up with vascular surgery clinic and scheduled imaging surveillance for graft integrity and complication monitoring.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier — standard reporting	Use as the base claim line without an additional modifier when no special circumstance applies.
`11`	Office or outpatient E/M — (historical; modifier used in some payer systems)	Applied per payer policy when reporting global service or distinct visit components if required by the payor.
`22`	Increased procedural services	Use when the work required to perform `35081` is substantially greater than typically required (document rationale).
`23`	Unusual anesthesia — when a procedure is performed under general anesthesia but the anesthesia risk is unusually high	Use if the procedure is performed under general anesthesia with documented unusually high anesthesia risk that affects billing per payer rules.
`50`	Bilateral procedure	Use when bilateral simultaneous procedures are performed and payer requires explicit modifier for bilateral service reporting (rare for aortic repair).
`51`	Multiple procedures	Use when `35081` is reported in the same operative session with additional CPT-coded procedures to indicate multiple procedures were performed.
`52`	Reduced services	Use when a component of the procedure was intentionally not completed or was reduced; documentation must state limitation.
`53`	Discontinued procedure	Use if the procedure was started but terminated due to extenuating circumstances prior to completion.
`62`	Two surgeons — surgical team approach	Use when two surgeons with different specialties perform distinct portions of `35081` (co-surgery).
`63`	Procedure performed on infants or neonates — (payer-specific)	Generally not applicable for typical adult AAAs; included when documentation supports patient age-specific modifier use per payer rules.
`78`	Return to operating room for a related procedure during the postoperative period	Use when the patient returns to the OR for a related complication of the original `35081` within the global period.
`80`	Assistant surgeon	Use when an assistant surgeon provides assistance during `35081` and billing requires modifier to identify the assistant.
`81`	Minimum assistant surgeon	Use when minimal assistance is provided and payer requires the modifier to indicate level of assistance.
`82`	Assistant surgeon when qualified resident not available	Use when an assistant is required and no qualified resident is available; documents role of assistant.

Taxonomy Code	Specialty	Notes
`207RG0100X`	Vascular Surgery	Primary specialty performing open abdominal aortic aneurysm repair.
`207RH0000X`	Thoracic and Cardiac Surgery	May participate for complex aortic disease involving thoracoabdominal segments or hybrid procedures.
`207L00000X`	General Surgery	Some general surgeons with vascular training perform open aortic repairs in select centers.
`2080P0202X`	Anesthesiology	Provides general anesthesia and perioperative hemodynamic management for open aortic surgery.
`363LA2200X`	Critical Care Medicine	Manages immediate postoperative ICU care for major vascular surgery patients.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I71.3`	Abdominal aortic aneurysm, ruptured	Indicates an emergent scenario requiring open repair such as `35081`.
`I71.4`	Abdominal aortic aneurysm, without rupture	Common indication for elective or urgent open repair when size or symptoms meet intervention criteria.
`I71.8`	Other aortic aneurysm and dissection	Includes complex aortic pathology that may require open surgical repair depending on location and extent.
`I71.9`	Aortic aneurysm, unspecified	Used when documentation describes an aortic aneurysm requiring repair but specificity is limited.
`S35.0`	Injury of abdominal aorta	Traumatic injury to the abdominal aorta that may necessitate open repair or grafting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35081`	Direct repair or graft placement of abdominal aorta via laparotomy (open repair)	Primary procedure described: open abdominal aortic aneurysm repair with graft placement.
`36147`	Insertion of temporary intra-arterial shunt, with or without fluoroscopic guidance	May be performed to maintain distal perfusion during open aortic repair in complex cases.
`36200`	Introduction of catheter, arterial system; for diagnostic purposes	Used for intraoperative arterial access for angiography or blood pressure monitoring.
`36556`	Insertion of non-tunneled centrally inserted central venous catheter; age 5 years or older	Commonly placed perioperatively for central venous access and vasoactive infusions.
`36901`	Endovascular therapy, percutaneous, for iliac or femoral artery; initial treatment	Performed if adjunct endovascular procedures are required for distal iliac reconstruction or hybrid repair.
`99100`	Anesthesia for emergency procedures (add-on)	Used by anesthesiology per payer policy for emergent open aortic repair situations.

CPT 35001: Carotid or Subclavian Arterial Repair with Graft Placement

CPT-35002-CAROTID-SUBCLAVIAN-ARTERY-OPEN-REPAIR-ANEURYSM

CPT 35002: Open Repair of Carotid or Subclavian Artery Aneurysm

CPT-35005-VERTEBRAL-ARTERY-REPAIR-OR-GRAFT-PLACEMENT

CPT 35005: Vertebral Artery Repair or Graft Placement

CPT-35011-AXILLARY-BRACHIAL-ARTERY-ANEURYSM-REPAIR

CPT 35011: Axillary–Brachial Artery Aneurysm Repair

CPT-35013-AXILLARY-BRACHIAL-ARTERY-REPAIR-GRAFT

CPT 35013: Axillary–Brachial Artery Repair, Direct Repair or Graft

CPT-35021-SUBCLAVIAN-INNOMINATE-ARTERY-REPAIR-GRAFT

CPT 35021: Repair/Graft of Subclavian or Innominate Artery Aneurysm

CPT-35022-SUBCLAVIAN-INNOMINATE-ARTERY-OPEN-REPAIR-GRAFT

CPT 35022: Open Repair of Subclavian or Innominate Artery Aneurysm

CPT-35045-RADIAL-ULNAR-ARTERY-REPAIR-FOREARM

CPT 35045: Radial or Ulnar Artery Repair, Forearm

CPT-35082-OPEN-REPAIR-RUPTURED-ABDOMINAL-AORTIC-ANEURYSM

CPT 35082: Open Repair of Ruptured Abdominal Aortic Aneurysm

CPT-35091-OPEN-ABDOMINAL-AORTIC-ANEURYSM-REPAIR-OR-GRAFT

CPT 35091: Open Abdominal Aortic/Visceral Vessel Aneurysm Repair

Showing 1–10 of 23

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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 35081: Open Abdominal Aortic Aneurysm Repair

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Billing Code Overview

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OpenPayer

CPT 35081: Open Abdominal Aortic Aneurysm Repair

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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