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CPT 44021: Small Bowel Exploration and Decompression Procedure

CPT code 44021 represents an open abdominal surgical procedure to locate a segment of the small intestine (excluding the duodenum) and place a decompression tube, commonly used in cases of intestinal obstruction with gas or fluid buildup. Nationally, this code is relevant for acute surgical care, hospital billing, and perioperative management for patients presenting with obstructive small-bowel pathology. It is an operative code that signals a significant inpatient surgical intervention with associated facility and provider considerations.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, the typical site-of-service implications for hospital billing, and the operational relevance for surgical and inpatient coding teams. The publication covers benchmarking and utilization context, coding and billing considerations specific to an operative small-bowel decompression approach, and any recent policy or coverage topics that affect reimbursement and prior authorization practices. Data not available in the input will be noted where applicable.

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Billing Code Overview

CPT code 44021 describes a surgical procedure in which the surgeon makes an incision in the abdomen to identify and access a portion of the small intestine other than the duodenum, and places a tube to decompress the bowel. This procedure is typically performed to relieve an intestinal obstruction with gas or fluid accumulation and to allow decompression of the affected intestinal segment.

Service type: Surgical abdominal procedure for small bowel exploration and decompression
Typical site of service: Inpatient operating room or surgical suite within a hospital or acute care setting

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CPT 44021: Small Bowel Exploration and Decompression Procedure

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Billing Code Overview

Service type: Surgical abdominal procedure for small bowel exploration and decompression
Typical site of service: Inpatient operating room or surgical suite within a hospital or acute care setting

Clinical & Coding Specifications

Clinical Context

A typical patient is a 65-year-old with progressive abdominal distention, vomiting, and inability to pass flatus over 24–48 hours. Imaging (upright abdominal radiographs and CT scan) demonstrates small bowel obstruction with marked gaseous dilation proximal to a transition point in the jejunum or ileum. Nonoperative measures (nasogastric tube, fluid resuscitation) have failed or are contraindicated. In the operating room under general anesthesia, the surgeon performs a laparotomy, identifies the affected segment of small intestine (other than the duodenum), and places an intestinal decompression tube (tube enterostomy) into the small bowel through an abdominal incision to relieve intraluminal gas and pressure. The procedure may be done as a temporary measure for severe obstruction, as palliation in nonoperative candidates, or as an adjunct to definitive surgical management. Typical site of service is the operating room in an inpatient acute care hospital. The service type is an open surgical decompression (enterostomy/tube placement) of the small intestine other than the duodenum. Postoperative workflow includes recovery in PACU, monitoring for return of bowel function, tube management orders (suction or gravity), and documentation of indication, intraoperative findings, tube type/size, insertion site, and any concurrent procedures.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, or complexity substantially exceeds normal for `44021` (document specifics and obtain payer preauthorization if required).
`23`	Unusual anesthesia	Use if procedure performed under general anesthesia when typically local/regional would be used and anesthesia is unrelated to patient condition.
`52`	Reduced services	Use if `44021` was attempted but not completed as originally planned (report reduction and reason).
`53`	Discontinued procedure	Use if procedure was started but halted for patient safety before completion (explain circumstances).
`59`	Distinct procedural service	Use when `44021` is performed distinct from another procedure at the same session on a separate site or separate incision (support with operative note).
`62`	Two surgeons	Use when two surgeons perform distinct portions of the operation (e.g., general surgeon and hepatobiliary surgeon collaborating).
`63`	Procedure performed on infants less than 4 kg	Use for neonatal patients meeting weight criteria per payer policy.
`78`	Return to operating room for related procedure during the postoperative period	Use if a related reoperation for a complication is required during global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use if an unrelated procedure is performed during the global period.
`26`	Professional component	Rarely applicable but use if billing physician is only reporting professional component distinct from facility resources (document clearly).
`50`	Bilateral procedure	Not typically applicable; include only if bilateral small-bowel tube placements are clinically performed and supported.

Taxonomy Code	Specialty	Notes
208800000X	General Surgery	Most common specialty performing open small-bowel decompression tube placement.
2080P0005X	Acute Care Surgery	Performed for emergent obstructive presentations and trauma-related indications.
207L00000X	Gastroenterology	May be involved in nonoperative decompression via endoscopic techniques; limited role for open enterostomy.
207K00000X	Colorectal Surgery	Involved when distal small-bowel disease or combined colorectal pathology requires coordination.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K56.60`	Unspecified intestinal obstruction	Common indication for decompression tube placement when specific level is not documented.
`K56.69`	Other intestinal obstruction	Covers obstructions of small bowel not otherwise specified; frequently associated with this procedure.
`K56.2`	Obstipation	Severe bowel motility failure or impaction leading to need for decompression in selected patients.
`K56.0`	Intussusception	May cause proximal small-bowel obstruction requiring decompression and surgical management.
`K91.89`	Other postprocedural complications and disorders of digestive system	Relevant when decompression is performed for postoperative small-bowel obstruction or complications.
`K55.9`	Vascular disorder of intestine, unspecified	Mesenteric ischemia or vascular compromise can lead to obstruction/ileus necessitating decompression tube.
`K52.9`	Noninfective gastroenteritis and colitis, unspecified	Nonmechanical causes of severe ileus may require decompression in some cases.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49000`	Exploratory laparotomy, exploratory celiotomy with or without biopsy(s) (separate procedure)	Often performed immediately prior to or concurrent with `44021` to identify the obstruction source and permit tube placement.
`44120`	Enterectomy, resection of small intestine with anastomosis	May follow `44021` when resection of ischemic or obstructed bowel is indicated during the same operative session.
`44320`	Enterostomy, creation of stoma; small intestine (eg, ileostomy, jejunostomy)	Alternative or subsequent procedure to `44021` when longer-term diversion or decompression is required.
`49440`	Percutaneous (e.g., radiologic) placement of abdominal tube for drainage or decompression	A less invasive alternative to `44021` in select patients; may precede or replace open tube placement.
`49560`	Repair of hernia, incarcerated or strangulated; with small bowel resection (if applicable)	Related when obstruction is caused by incarcerated hernia necessitating repair, potentially in the same operative setting as `44021`.

CPT 44005: Lysis of Adhesions, Colon and Intra‑abdominal Structures

CPT-44010-EXPLORATORY-ABDOMEN-DUODENUM-EXCISION-BIOPSY-FOREIGN-BODY

CPT 44010: Exploratory Abdominal Surgery with Duodenal Examination

CPT-44015-JEJUNOSTOMY-FEEDING-TUBE-PLACEMENT

CPT 44015: Jejunostomy Feeding Tube Placement

CPT-44020-GASTROINTESTINAL-SURGICAL-PROCEDURE

CPT 44020: Gastrointestinal Surgical Procedure

CPT-44025-COLON-INCISION-EXAMINATION-BIOPSY-REMOVAL-FOREIGN-BODY

CPT 44025: Incision of Colon for Examination, Biopsy, or Foreign Body Removal

CPT-44050-OPEN-INTESTINAL-REPAIR-TWISTED-TELESCOPED-HERNIATED-BOWEL

CPT 44050: Open Intestinal Repair for Twisted, Telescoped, or Herniated Bowel

CPT-44055-DEROTATION-LYSIS-INTESTINAL-MALROTATION

CPT 44055: Open Surgical Derotation and Lysis of Intestinal Malrotation

Frequently Asked Questions

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

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, or complexity substantially exceeds normal for `44021` (document specifics and obtain payer preauthorization if required).
`23`	Unusual anesthesia	Use if procedure performed under general anesthesia when typically local/regional would be used and anesthesia is unrelated to patient condition.
`52`	Reduced services	Use if `44021` was attempted but not completed as originally planned (report reduction and reason).
`53`	Discontinued procedure	Use if procedure was started but halted for patient safety before completion (explain circumstances).
`59`	Distinct procedural service	Use when `44021` is performed distinct from another procedure at the same session on a separate site or separate incision (support with operative note).
`62`	Two surgeons	Use when two surgeons perform distinct portions of the operation (e.g., general surgeon and hepatobiliary surgeon collaborating).
`63`	Procedure performed on infants less than 4 kg	Use for neonatal patients meeting weight criteria per payer policy.
`78`	Return to operating room for related procedure during the postoperative period	Use if a related reoperation for a complication is required during global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use if an unrelated procedure is performed during the global period.
`26`	Professional component	Rarely applicable but use if billing physician is only reporting professional component distinct from facility resources (document clearly).
`50`	Bilateral procedure	Not typically applicable; include only if bilateral small-bowel tube placements are clinically performed and supported.

Taxonomy Code	Specialty	Notes
208800000X	General Surgery	Most common specialty performing open small-bowel decompression tube placement.
2080P0005X	Acute Care Surgery	Performed for emergent obstructive presentations and trauma-related indications.
207L00000X	Gastroenterology	May be involved in nonoperative decompression via endoscopic techniques; limited role for open enterostomy.
207K00000X	Colorectal Surgery	Involved when distal small-bowel disease or combined colorectal pathology requires coordination.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K56.60`	Unspecified intestinal obstruction	Common indication for decompression tube placement when specific level is not documented.
`K56.69`	Other intestinal obstruction	Covers obstructions of small bowel not otherwise specified; frequently associated with this procedure.
`K56.2`	Obstipation	Severe bowel motility failure or impaction leading to need for decompression in selected patients.
`K56.0`	Intussusception	May cause proximal small-bowel obstruction requiring decompression and surgical management.
`K91.89`	Other postprocedural complications and disorders of digestive system	Relevant when decompression is performed for postoperative small-bowel obstruction or complications.
`K55.9`	Vascular disorder of intestine, unspecified	Mesenteric ischemia or vascular compromise can lead to obstruction/ileus necessitating decompression tube.
`K52.9`	Noninfective gastroenteritis and colitis, unspecified	Nonmechanical causes of severe ileus may require decompression in some cases.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49000`	Exploratory laparotomy, exploratory celiotomy with or without biopsy(s) (separate procedure)	Often performed immediately prior to or concurrent with `44021` to identify the obstruction source and permit tube placement.
`44120`	Enterectomy, resection of small intestine with anastomosis	May follow `44021` when resection of ischemic or obstructed bowel is indicated during the same operative session.
`44320`	Enterostomy, creation of stoma; small intestine (eg, ileostomy, jejunostomy)	Alternative or subsequent procedure to `44021` when longer-term diversion or decompression is required.
`49440`	Percutaneous (e.g., radiologic) placement of abdominal tube for drainage or decompression	A less invasive alternative to `44021` in select patients; may precede or replace open tube placement.
`49560`	Repair of hernia, incarcerated or strangulated; with small bowel resection (if applicable)	Related when obstruction is caused by incarcerated hernia necessitating repair, potentially in the same operative setting as `44021`.

CPT 44005: Lysis of Adhesions, Colon and Intra‑abdominal Structures

CPT-44010-EXPLORATORY-ABDOMEN-DUODENUM-EXCISION-BIOPSY-FOREIGN-BODY

CPT 44010: Exploratory Abdominal Surgery with Duodenal Examination

CPT-44015-JEJUNOSTOMY-FEEDING-TUBE-PLACEMENT

CPT 44015: Jejunostomy Feeding Tube Placement

CPT-44020-GASTROINTESTINAL-SURGICAL-PROCEDURE

CPT 44020: Gastrointestinal Surgical Procedure

CPT-44025-COLON-INCISION-EXAMINATION-BIOPSY-REMOVAL-FOREIGN-BODY

CPT 44025: Incision of Colon for Examination, Biopsy, or Foreign Body Removal

CPT-44050-OPEN-INTESTINAL-REPAIR-TWISTED-TELESCOPED-HERNIATED-BOWEL

CPT 44050: Open Intestinal Repair for Twisted, Telescoped, or Herniated Bowel

CPT-44055-DEROTATION-LYSIS-INTESTINAL-MALROTATION

CPT 44055: Open Surgical Derotation and Lysis of Intestinal Malrotation

Frequently Asked Questions

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.

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CPT 44021: Small Bowel Exploration and Decompression Procedure

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Billing Code Overview

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CPT 44021: Small Bowel Exploration and Decompression Procedure

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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

CPT 44021: Small Bowel Exploration and Decompression Procedure

Sign up for cpt 44021 policy alerts

Billing Code Overview

CPT 44021: Small Bowel Exploration and Decompression Procedure

Sign up for cpt 44021 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT 44021 describe and when is it typically performed?

Which modifiers are applicable to CPT 44021 and when should they be considered?

What related CPT codes should billing teams consider alongside 44021?

Which ICD-10 diagnosis codes are commonly associated with CPT 44021?

Which specialties perform CPT 44021 and where is the procedure usually performed?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT 44021 describe and when is it typically performed?

Which modifiers are applicable to CPT 44021 and when should they be considered?

What related CPT codes should billing teams consider alongside 44021?

Which ICD-10 diagnosis codes are commonly associated with CPT 44021?

Which specialties perform CPT 44021 and where is the procedure usually performed?

References