ICD-10-CM Code For Other Diseases Of Intestine: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K63 includes miscellaneous and other specified diseases of the intestine such as intestinal perforation, fistula, diverticula, and localized lesions of the bowel. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving structural intestinal abnormalities, complications of bowel disease, or post-procedural intestinal conditions, capturing disease severity and organ involvement. Accurate coding within the ICD-10-CM K63 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM K63: Other Diseases Of Intestine Overview

The ICD-10-CM K63 group represents a set of diagnoses for miscellaneous and other specified diseases of the intestine affecting the small and large bowel. These conditions include perforations, fistulas, diverticula, and other localized intestinal abnormalities that do not fall under more specific intestinal disorder categories. Accurate coding of these conditions matters because it supports complete clinical documentation and appropriate claim adjudication for services related to intestinal disease management.

When to Use

Use a code from this group when the clinical documentation describes an intestinal condition such as a perforation, fistula, diverticulum, or other localized intestinal lesion not covered by a more specific code. Select the most specific code available that reflects the anatomical site and clinical circumstance documented in the medical record.

ICD-10-CM Codes

14 rows

ICD-10-CM Code	Description
K63.0	Abscess of intestine
K63.1	Perforation of intestine (nontraumatic)
K63.2	Fistula of intestine
K63.3	Ulcer of intestine
K63.4	Enteroptosis
K63.5	Polyp of colon
K63.81	Dieulafoy lesion of intestine
K63.8211	Small intestinal bacterial overgrowth, hydrogen-subtype
K63.8212	Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
K63.8219	Small intestinal bacterial overgrowth, unspecified
K63.822	Small intestinal fungal overgrowth
K63.829	Intestinal methanogen overgrowth, unspecified
K63.89	Other specified diseases of intestine
K63.9	Disease of intestine, unspecified

DRG Codes

8 rows

DRG Code	Description
371	Major Gastrointestinal Disorders and Peritoneal Infections with MCC
372	Major Gastrointestinal Disorders and Peritoneal Infections with CC
373	Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
393	Other Digestive System Diagnoses with MCC
394	Other Digestive System Diagnoses with CC
395	Other Digestive System Diagnoses without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

A middle-aged patient presents to the emergency department with sudden onset severe lower abdominal pain, fever, and signs of peritonitis after known diverticulitis. Imaging reveals a localized intestinal perforation with adjacent abscess formation and peritoneal contamination; surgical evaluation and management are required. A diagnosis from this group is assigned to capture the acute perforation/rupture of the intestinal wall and associated complication. Typical codes: K63.1, K63.3
An older adult with a history of inflammatory bowel disease and prior abdominal surgery attends a gastroenterology clinic for progressive bloating, intermittent crampy abdominal pain, and chronic constipation. Endoscopic evaluation and imaging identify a symptomatic intestinal stricture causing partial obstruction and altered bowel transit; this chronic structural change is documented and managed nonemergently. Typical codes: K63.2, K63.9
A hospitalized patient with recent abdominal malignancy and radiation therapy develops chronic enteric fistulae and persistent drainage from the bowel to the skin with recurrent infections and need for wound care. The care team documents the abnormal communications and their complications to guide ongoing multidisciplinary management and coding. Typical codes: K63.8, K63.89

Related Codes

K55-VASCULAR-DISORDERS-OF-INTESTINE

ICD-10-CM Code For Vascular Disorders Of Intestine: Group Overview

K56-PARALYTIC-ILEUS-AND-INTESTINAL-OBSTRUCTION

ICD-10-CM Code For Paralytic Ileus And Intestinal Obstruction Without Hernia: Group Overview

K57-DIVERTICULAR-DISEASE-OF-INTESTINE

ICD-10-CM Code For Diverticular Disease Of Intestine: Group Overview

K58-IRRITABLE-BOWEL-SYNDROME

ICD-10-CM Code For Irritable Bowel Syndrome: Group Overview

K59-OTHER-FUNCTIONAL-INTESTINAL-DISORDERS

ICD-10-CM Code For Other Functional Intestinal Disorders: Group Overview

K60-FISSURE-AND-FISTULA-ANAL-RECTAL

ICD-10-CM Code For Fissure And Fistula Of Anal And Rectal Regions: Group Overview

K61-ABSCESS-OF-ANAL-AND-RECTAL-REGIONS

ICD-10-CM Code For Abscess Of Anal And Rectal Regions: Group Overview

K62-OTHER-DISEASES-OF-ANUS-AND-RECTUM

ICD-10-CM Code For Other Diseases Of Anus And Rectum: Group Overview

K64-HEMORRHOIDS-AND-PERIANAL-VENOUS-THROMBOSIS

ICD-10-CM Code For Hemorrhoids And Perianal Venous Thrombosis: Group Overview

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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When to Use

ICD-10-CM Codes

14 rows

ICD-10-CM Code	Description
K63.0	Abscess of intestine
K63.1	Perforation of intestine (nontraumatic)
K63.2	Fistula of intestine
K63.3	Ulcer of intestine
K63.4	Enteroptosis
K63.5	Polyp of colon
K63.81	Dieulafoy lesion of intestine
K63.8211	Small intestinal bacterial overgrowth, hydrogen-subtype
K63.8212	Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
K63.8219	Small intestinal bacterial overgrowth, unspecified
K63.822	Small intestinal fungal overgrowth
K63.829	Intestinal methanogen overgrowth, unspecified
K63.89	Other specified diseases of intestine
K63.9	Disease of intestine, unspecified

DRG Codes

8 rows

DRG Code	Description
371	Major Gastrointestinal Disorders and Peritoneal Infections with MCC
372	Major Gastrointestinal Disorders and Peritoneal Infections with CC
373	Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
393	Other Digestive System Diagnoses with MCC
394	Other Digestive System Diagnoses with CC
395	Other Digestive System Diagnoses without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

A middle-aged patient presents to the emergency department with sudden onset severe lower abdominal pain, fever, and signs of peritonitis after known diverticulitis. Imaging reveals a localized intestinal perforation with adjacent abscess formation and peritoneal contamination; surgical evaluation and management are required. A diagnosis from this group is assigned to capture the acute perforation/rupture of the intestinal wall and associated complication. Typical codes: K63.1, K63.3
An older adult with a history of inflammatory bowel disease and prior abdominal surgery attends a gastroenterology clinic for progressive bloating, intermittent crampy abdominal pain, and chronic constipation. Endoscopic evaluation and imaging identify a symptomatic intestinal stricture causing partial obstruction and altered bowel transit; this chronic structural change is documented and managed nonemergently. Typical codes: K63.2, K63.9
A hospitalized patient with recent abdominal malignancy and radiation therapy develops chronic enteric fistulae and persistent drainage from the bowel to the skin with recurrent infections and need for wound care. The care team documents the abnormal communications and their complications to guide ongoing multidisciplinary management and coding. Typical codes: K63.8, K63.89

Related Codes

K55-VASCULAR-DISORDERS-OF-INTESTINE

ICD-10-CM Code For Vascular Disorders Of Intestine: Group Overview

K56-PARALYTIC-ILEUS-AND-INTESTINAL-OBSTRUCTION

ICD-10-CM Code For Paralytic Ileus And Intestinal Obstruction Without Hernia: Group Overview

K57-DIVERTICULAR-DISEASE-OF-INTESTINE

ICD-10-CM Code For Diverticular Disease Of Intestine: Group Overview

K58-IRRITABLE-BOWEL-SYNDROME

ICD-10-CM Code For Irritable Bowel Syndrome: Group Overview

K59-OTHER-FUNCTIONAL-INTESTINAL-DISORDERS

ICD-10-CM Code For Other Functional Intestinal Disorders: Group Overview

K60-FISSURE-AND-FISTULA-ANAL-RECTAL

ICD-10-CM Code For Fissure And Fistula Of Anal And Rectal Regions: Group Overview

K61-ABSCESS-OF-ANAL-AND-RECTAL-REGIONS

ICD-10-CM Code For Abscess Of Anal And Rectal Regions: Group Overview

K62-OTHER-DISEASES-OF-ANUS-AND-RECTUM

ICD-10-CM Code For Other Diseases Of Anus And Rectum: Group Overview

K64-HEMORRHOIDS-AND-PERIANAL-VENOUS-THROMBOSIS

ICD-10-CM Code For Hemorrhoids And Perianal Venous Thrombosis: Group Overview

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.

ICD-10-CM Code For Other Diseases Of Intestine: Group Overview

Sign up for ICD-10-CM Code For Other Diseases Of Intestine: Group Overview policy alerts

ICD-10-CM K63: Other Diseases Of Intestine Overview

ICD-10-CM Code For Other Diseases Of Intestine: Group Overview

Sign up for ICD-10-CM Code For Other Diseases Of Intestine: Group Overview policy alerts

ICD-10-CM K63: Other Diseases Of Intestine Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM `K63` group?

How are the individual codes within `K63` formatted in the listing?

Why does accurate coding within `K63` matter for claims?

Which DRGs commonly relate to diagnoses in the `K63` group?

Can `K63` codes document both small and large bowel conditions?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM `K63` group?

How are the individual codes within `K63` formatted in the listing?

Why does accurate coding within `K63` matter for claims?

Which DRGs commonly relate to diagnoses in the `K63` group?

Can `K63` codes document both small and large bowel conditions?

References