ICD-10-CM 2027
ICD-10 code for enterocolitis
From the official ICD-10-CM alphabetic index entry “Enterocolitis”. Page updated September 29, 2026.
About coding enterocolitis
The ICD-10-CM code for enterocolitis is K52.9 (Noninfective gastroenteritis and colitis, unspecified). The official index lists 30 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K52.9.
Within K52, choose K52.9 (Noninfective gastroenteritis and colitis, unspecified) only when documentation doesn't support a more specific option: gastroenteritis and colitis due to radiation (K52.0), toxic gastroenteritis and colitis (K52.1), allergic and dietetic gastroenteritis and colitis (K52.2), indeterminate colitis (K52.3) and other specified noninfective gastroenteritis and colitis (K52.8).
Don't report K52.9 together with the conditions in its Excludes1 note: diarrhea NOS (R19.7), functional diarrhea (K59.1), infectious gastroenteritis and colitis NOS (A09), neonatal diarrhea (noninfective) (P78.3) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific enterocolitis codes (official index)
- due to
- Clostridioides difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- Clostridium difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- fulminant ischemic K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified
- granulomatous
- hemorrhagic (acute) K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified
- chronic K55.1 — Chronic vascular disorders of intestine
- infectious NEC A09 — Infectious gastroenteritis and colitis, unspecified
- ischemic K55.9 — Vascular disorder of intestine, unspecified
- necrotizing K55.30 — Necrotizing enterocolitis, unspecified
- with
- perforation K55.33 — Stage 3 necrotizing enterocolitis
- pneumatosis K55.32 — Stage 2 necrotizing enterocolitis
- and perforation K55.33 — Stage 3 necrotizing enterocolitis
- due to
- Clostridioides difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- Clostridium difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- in non-newborn K55.30 — Necrotizing enterocolitis, unspecified
- stage 1 (without pneumatosis, without perforation) K55.31 — Stage 1 necrotizing enterocolitis
- stage 2 (with pneumatosis, without perforation) K55.32 — Stage 2 necrotizing enterocolitis
- stage 3 (with pneumatosis, with perforation) K55.33 — Stage 3 necrotizing enterocolitis
- in newborn P77.9 — Necrotizing enterocolitis in newborn, unspecified
- stage 1 (without pneumatosis, without perforation) P77.1 — Stage 1 necrotizing enterocolitis in newborn
- stage 2 (with pneumatosis, without perforation) P77.2 — Stage 2 necrotizing enterocolitis in newborn
- stage 3 (with pneumatosis, with perforation) P77.3 — Stage 3 necrotizing enterocolitis in newborn
- without pneumatosis or perforation K55.31 — Stage 1 necrotizing enterocolitis
- noninfectious K52.9 — Noninfective gastroenteritis and colitis, unspecified
- newborn
- pseudomembranous (newborn)
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- radiation K52.0 — Gastroenteritis and colitis due to radiation
- newborn
- ulcerative (chronic)
Don't confuse with (Excludes1 for K52.9)
Common questions about enterocolitis ICD-10 codes
What is the ICD-10 code for enterocolitis?
- K52.9 — Noninfective gastroenteritis and colitis, unspecified. More specific codes apply when the documentation supports them: A04.72, A04.71, A04.72, A04.71 and others below.
What is the ICD-10 code for fulminant ischemic enterocolitis?
- K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified.
What is the ICD-10 code for hemorrhagic enterocolitis?
- K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified.
What is the ICD-10 code for infectious nec enterocolitis?
- A09 — Infectious gastroenteritis and colitis, unspecified.
What is the ICD-10 code for ischemic enterocolitis?
- K55.9 — Vascular disorder of intestine, unspecified.
What is the ICD-10 code for necrotizing enterocolitis?
- K55.30 — Necrotizing enterocolitis, unspecified.
What is the ICD-10 code for noninfectious enterocolitis?
- K52.9 — Noninfective gastroenteritis and colitis, unspecified.
Is K52.9 billable?
- Yes. K52.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K52.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K52.9 as a principal diagnosis.
Is K52.9 a CC or MCC?
- No. K52.9 is neither a CC nor an MCC under MS-DRG v44.0.