CPT 35840 Abdominal Re-exploration Reimbursement | OpenPayer

Summary & Overview

CPT 35840: Abdominal Re-exploration for Bleeding or Infection

CPT code 35840 designates surgical re-exploration of the abdomen to identify and correct postoperative bleeding, remove clots, or address intra-abdominal infection. This code captures an urgent or emergent operative return to the abdominal cavity after a prior procedure and is critical for documenting complications that require immediate surgical intervention. Nationally, accurate use of this code impacts quality reporting, complication tracking, and hospital surgical morbidity metrics.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for re-exploration, common billing considerations, and the typical settings where this service is performed. The publication provides benchmarks where available, notes on coding and documentation expectations, and summaries of payer coverage patterns and policy updates when present. Where payer-specific policies are not provided, the report indicates that data are not available in the input.

This summary is intended for coding professionals, surgical teams, and revenue cycle staff seeking a national-level briefing on the use and documentation of CPT code 35840, including its clinical implications and relevance to postoperative complication management.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 35840abdominal re-explorationsurgical complicationpostoperative hemorrhagehematoma evacuationintra-abdominal infectionoperating roomsurgical coding

Billing Code Overview

CPT code 35840 describes reopening the abdomen after a prior operation to locate and control postoperative bleeding, remove clots, or address intra-abdominal infection. This service is performed when a return to the operative field is required to identify and correct a source of hemorrhage, evacuate hematoma, or treat infection related to a recent surgical procedure.

Service type: Re-exploration of the abdominal cavity for control of bleeding, clot evacuation, or management of infection
Typical site of service: Hospital operating room (postoperative return to the operative suite or emergency operative setting)

Clinical & Coding Specifications

Clinical Context

A typical patient is a 58-year-old who underwent a prior exploratory laparotomy for bowel resection three days earlier and now presents with hypotension, tachycardia, abdominal distention, and a dropping hemoglobin. Imaging and bedside exam suggest intra-abdominal hemorrhage or an anastomotic leak with contamination. The surgeon returns the patient to the operating room for an urgent re-exploration of the abdomen: reopening the prior incision, evacuating clots, identifying and controlling the bleeding source or repairing the anastomosis, performing washout for contamination, and placing drains as indicated. The clinical workflow includes preoperative stabilization (IV fluids, blood products), anesthesia evaluation, intraoperative exploration and repair, and postoperative monitoring in a surgical intensive care unit or monitored bed. Documentation must clearly state the reason for re-exploration (e.g., hemorrhage, sepsis, suspected leak), findings, procedures performed to correct the source, and the relation to the prior operation to support use of 35840.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required is substantially greater than typical for `35840` (document extra time, complexity, or difficulty).

CPT 35879: Lower Extremity Bypass Graft Repair with Venous Patch

CPT-35700-ARTERIAL-BYPASS-GRAFT-REOPERATION

CPT 35700: Reoperation on Arterial Bypass Graft

CPT-35903-EXCISION-INFECTED-ARM-LEG-GRAFT

CPT 35903: Excision of Infected Arm or Leg Graft

CPT-35907-EXCISION-INFECTED-ABDOMINAL-GRAFT

CPT 35907: Excision of Infected Abdominal Graft

CPT-35860-EXTREMITY-RE-EXPLORATION-FOR-BLEEDING-CLOTTING-INFECTION

CPT 35860: Re-exploration of Arm or Leg for Bleeding, Clotting, or Infection

CPT-35905-EXCISION-INFECTED-THORACIC-GRAFT

CPT 35905: Excision of Infected Thoracic Graft

CPT-35881-LOWER-EXTREMITY-BYPASS-GRAFT-VEIN-SEGMENT-REPLACEMENT

CPT 35881: Lower Extremity Bypass Graft Vein Segment Replacement

CPT-35701-NECK-ARTERY-EXPLORATION-SCAR-TISSUE-REMOVAL

CPT 35701: Neck Artery Exploration and Scar Tissue Removal

CPT-35875-VASCULAR-GRAFT-THROMBECTOMY-NON-HEMODIALYSIS

CPT 35875: Removal of Clot from Non-Hemodialysis Vascular Graft

CPT-35703-LOWER-EXTREMITY-ARTERIAL-EXPLORATION-NO-REPAIR

CPT 35703: Exploratory Lower-Extremity Arterial Procedure Without Repair

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Taxonomy Code	Specialty	Notes
`208100000X`	General Surgery	Most common specialty performing abdominal re-exploration for postoperative bleeding or infection.
`2080S0123X`	Surgical Critical Care	Often involved in perioperative management and complex re-explorations in critically ill patients.
`2086S0105X`	Colon and Rectal Surgery	Common when initial procedure involved colorectal operations and re-exploration addresses anastomotic leaks or pelvic sepsis.
`207L00000X`	Vascular Surgery	Involved when bleeding source is vascular or requires vascular repair.
`207K00000X`	Acute Care Surgery	Providers who manage emergency abdominal re-explorations and complex trauma-related returns to the OR.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K91.2`	Postsurgical sepsis	Indicates infection after surgery that may require re-exploration for source control.
`K91.89`	Other postprocedural complications and disorders of digestive system	Captures various postoperative complications such as leaks or necrosis prompting re-exploration.
`T81.11XA`	Hemorrhage complicating a procedure, initial encounter	Directly relevant when postoperative bleeding necessitates reopening the abdomen.
`T81.12XA`	Hematoma complicating a procedure, initial encounter	Relevant for postoperative hematoma requiring evacuation at re-exploration.
`K65.0`	Acute peritonitis	Peritonitis from contamination or leak that often requires operative washout and source control.
`K35.80`	Unspecified acute appendicitis (with generalized peritonitis as applicable)	Example of an initial intra-abdominal process that may lead to reoperation for complications; included as representative of acute intra-abdominal sepsis scenarios.
`S36.812A`	Laceration of spleen, initial encounter	Traumatic or iatrogenic splenic injury can present postoperatively with bleeding requiring re-exploration.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49000`	Exploratory laparotomy, exploratory celiotomy with or without biopsy(s) (separate procedure)	May be performed during initial evaluation or as part of re-exploration if additional intra-abdominal exploration or biopsy is required.
`38230`	Transfusion of blood and blood components (per unit), not otherwise specified	Often billed when intraoperative or postoperative transfusion is required due to hemorrhage discovered at re-exploration.
`10160`	Puncture aspiration of abscess; simple or single	May be an alternative or adjunct in management when localized fluid collections or abscesses are drained percutaneously instead of open re-exploration.
`44120`	Enterolysis (separation of adhesions) with small intestine	May be required during re-exploration when adhesions are contributing to obstruction or complicating access to the bleeding source.
`49560`	Drainage of postoperative wound seroma, hematoma; complicated or infected	Procedure codes for management of postoperative collections that may be addressed at the time of re-exploration.

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