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ICD-10-CM 2027

ICD-10 code for rectum perforation

K63.1

Perforation of intestine (nontraumatic)

✓ Billable / specificMCC — major complication/comorbidity

From the official ICD-10-CM alphabetic index entry “Perforation, perforated (nontraumatic) (of) › rectum”. Page updated September 29, 2026.

About coding rectum perforation

The ICD-10-CM code for rectum perforation is K63.1 (Perforation of intestine (nontraumatic)). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K63.1.

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-).

More specific rectum perforation codes (official index)

  • newborn P78.0 — Perinatal intestinal perforation
  • obstetrical trauma O71.5 — Other obstetric injury to pelvic organs
  • traumatic S36.63 — Laceration of rectum

Don't confuse with (Excludes1 for K63.1)

  • perforation (nontraumatic) of duodenum (K26.-)
  • perforation (nontraumatic) of intestine with diverticular disease (K57.0, K57.2, K57.4, K57.8)

Common questions about rectum perforation ICD-10 codes

What is the ICD-10 code for rectum perforation?

K63.1 — Perforation of intestine (nontraumatic). More specific codes apply when the documentation supports them: P78.0, O71.5, S36.63.

What is the ICD-10 code for newborn rectum perforation?

P78.0 — Perinatal intestinal perforation.

What is the ICD-10 code for obstetrical trauma rectum perforation?

O71.5 — Other obstetric injury to pelvic organs.

What is the ICD-10 code for traumatic rectum perforation?

S36.63 — Laceration of rectum (header code; choose a more specific subcode).

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.