2027 ICD-10-CM Diagnosis Code K63.2Fistula of intestine
ICD-10-CM Codes›K00–K95›K55-K64›K63
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
K63.2 is a billable ICD-10-CM diagnosis code for fistula of intestine. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 1 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abdominal wall fistula
- Acquired choledochojejunal fistula
- Arterial-enteric fistula
- Colocolic fistula
- Colonic fistula
- Colovascular fistula
- Enteroanal fistula
- Enterocolic fistula
- Enterocutaneous fistula
- Enteroenteric fistula
- External large bowel fistula
- External small bowel fistula
- Fecal fistula
- Fistula of bile duct
- Fistula of intestine
- Fistula of intestine to abdominal wall
- Fistula of large intestine due to diverticulitis
- Fistula of sigmoid colon
- Fistula of small intestine due to diverticulitis
- Ileocutaneous fistula
- Ileorectal fistula
- Ileoumbilical fistula
- Internal large bowel fistula
- Internal small bowel fistula
- Intestinourinary fistula
- Jejunal fistula
- Jejunocolic fistula
- Jejunocutaneous fistula
- Jejunoenteric fistula
- Large bowel fistula
- Small bowel fistula
- Umbilical fistula
- Vascular graft enteric fistula
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K63.2: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- if applicable, disruption of internal operation (surgical) wound (T81.32-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
abdomen (wall) K63.2
intestine NEC K63.2
abdominorectal K63.2
abdominosigmoidal K63.2
cecosigmoidal K63.2
cecum K63.2
colon K63.2
enterocolic K63.2
enterocutaneous K63.2
fecal K63.2
ileum K63.2
intestine NEC K63.2
jejunum K63.2
pericecal K63.2
perineosigmoidal K63.2
sigmoid K63.2
stercoral K63.2
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Intestinal Fistula
an abnormal communication between the small or large intestine and another organ or cavity.
Patient EducationClinical
Colonic Diseases
Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K63.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K63.2Overview
What is the ICD-10 code for fistula of intestine?
The ICD-10-CM code for fistula of intestine is K63.2 (sometimes written as K632). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K63.2 (Other diseases of intestine) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report fistula of intestine on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K63.2 group to?
When fistula of intestine is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K63.2 a CC or MCC?
CMS lists K63.2 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 1 closely related codes in its exclusion list.
Can K63.2 be reported with K31.6?
Not as a rule. The Excludes1 note on K63.2 lists "fistula of duodenum (K31.6)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
