ICD-10 Code for Enterocolitis
The ICD-10-CM code for enterocolitis is K52.9 — Noninfective gastroenteritis and colitis, unspecified. This is the code the Alphabetic Index gives for enterocolitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
K52.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which enterocolitis code should you use?
The Alphabetic Index lists 16 codes under Enterocolitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| fulminant ischemic | K55.059 | Acute (reversible) ischemia of intestine, part and extent unspecified | |
| hemorrhagic | K55.059 | Acute (reversible) ischemia of intestine, part and extent unspecified | |
| infectious NEC | A09 | Infectious gastroenteritis and colitis, unspecified | |
| ischemic | K55.9 | Vascular disorder of intestine, unspecified | |
| necrotizing | K55.30 | Necrotizing enterocolitis, unspecified | |
| noninfectious | K52.9 | Noninfective gastroenteritis and colitis, unspecified | |
| radiation | K52.0 | Gastroenteritis and colitis due to radiation |
Enterocolitis hemorrhagic
| chronic | K55.1 | Chronic vascular disorders of intestine |
Enterocolitis necrotizing
| in non-newborn | K55.30 | Necrotizing enterocolitis, unspecified | |
| in newborn | P77.9 | Necrotizing enterocolitis in newborn, unspecified | |
| without pneumatosis or perforation | K55.31 | Stage 1 necrotizing enterocolitis | |
| with › perforation | K55.33 | Stage 3 necrotizing enterocolitis | |
| with › pneumatosis | K55.32 | Stage 2 necrotizing enterocolitis | |
| in non-newborn › stage 1 | K55.31 | Stage 1 necrotizing enterocolitis | |
| in non-newborn › stage 2 | K55.32 | Stage 2 necrotizing enterocolitis | |
| in non-newborn › stage 3 | K55.33 | Stage 3 necrotizing enterocolitis | |
| in newborn › stage 1 | P77.1 | Stage 1 necrotizing enterocolitis in newborn | |
| in newborn › stage 2 | P77.2 | Stage 2 necrotizing enterocolitis in newborn | |
| in newborn › stage 3 | P77.3 | Stage 3 necrotizing enterocolitis in newborn | |
| with › pneumatosis › 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 | |
| due to › Clostridioides difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent | |
| due to › Clostridium difficile › not specified as recurrent | A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | |
| due to › Clostridium difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent |
Enterocolitis pseudomembranous
Enterocolitis due to
| Clostridioides difficile › not specified as recurrent | A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | |
| Clostridioides difficile › 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 | |
| Clostridium difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources