ICD-10-CM 2027 diagnosis code
K63.1Perforation of intestine (nontraumatic)
K63.1 is a valid, billable ICD-10-CM code for perforation of intestine (nontraumatic). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Bowel perforation, ICD-10 code for Colon perforation, ICD-10 code for Ileum perforation, ICD-10 code for Rectum perforation.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About K63.1
K63.1 is the ICD-10-CM diagnosis code for perforation of intestine (nontraumatic). It belongs to category K63 (other diseases of intestine), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within K63 (other diseases of intestine), K63.1 is specifically for perforation of intestine (nontraumatic). Related codes cover abscess of intestine (K63.0), fistula of intestine (K63.2), ulcer of intestine (K63.3), Enteroptosis (K63.4), polyp of colon (K63.5), other specified diseases of intestine (K63.8) and disease of intestine, unspecified (K63.9).
Don't report K63.1 together with the conditions in its Excludes1 note: perforation (nontraumatic) of duodenum (K26.-) and perforation (nontraumatic) of intestine with diverticular disease (K57.0, K57.2, K57.4, K57.8).
The conditions in its Excludes2 note aren't part of K63.1, but may be coded alongside it if the patient has both: perforation (nontraumatic) of appendix (K35.2-, K35.3-).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228), DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 06 (Diseases and Disorders of the Digestive System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 569.83 (perforation of intestine).
Coding notes
- Perforation (nontraumatic) of rectum
Notes that apply from higher levels
Instructions written at a parent level also apply to K63.1.
Broader instructions also apply from Chapter 11: Diseases of the digestive system.
Alphabetic index entries
18 entriesTerms in the official ICD-10-CM index that lead to K63.1.
- Perforation, perforated (nontraumatic) (of) › bowel
- Perforation, perforated (nontraumatic) (of) › colon
- Perforation, perforated (nontraumatic) (of) › ileum
- Perforation, perforated (nontraumatic) (of) › intestine NEC
- Perforation, perforated (nontraumatic) (of) › intestine NEC › ulcerative NEC
- Perforation, perforated (nontraumatic) (of) › jejunum, jejunal
- Perforation, perforated (nontraumatic) (of) › rectum
- Perforation, perforated (nontraumatic) (of) › sigmoid
- Rupture, ruptured › bowel (nontraumatic)
- Rupture, ruptured › colon (nontraumatic)
- Rupture, ruptured › intestine NEC (nontraumatic)
- Rupture, ruptured › rectum (nontraumatic)
- Rupture, ruptured › sigmoid (nontraumatic)
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › intestine, intestinal › with perforation
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › intestine, intestinal › perforating
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › primary of intestine › with perforation
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › rectosigmoid › with perforation
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › stercoraceous, stercoral › with perforation
Codes whose notes reference K63.1
- K63.3Excludes1
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 06 · Diseases and Disorders of the Digestive System
MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period
MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period
ICD-9-CM equivalent
Converter →- 569.83Perforation of intestineexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about K63.1
Is K63.1 billable?
- Yes. K63.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K63.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K63.1 as a principal diagnosis.
Is K63.1 a CC or MCC?
- K63.1 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does K63.1 group to?
- K63.1 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC), MS-DRG 395 (Other Digestive System Diagnoses without CC/MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for K63.1?
- The CMS General Equivalence Mappings map K63.1 to ICD-9-CM 569.83.