K52.9
Noninfective gastroenteritis and colitis, unspecified
K52.9 (also written K529) is a billable ICD-10-CM diagnosis code for noninfective gastroenteritis and colitis, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 14 codes in category K52 (Other and unspecified noninfective gastroenteritis and colitis). The Alphabetic Index lists it under 18 entries. Its coding notes include 7 Excludes1 entries and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- 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)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Gastrointestinal tract and Genitourinary system clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Includes
Further defines or gives examples of the content of the category.
Also from chapter/block level (1 note)
- noninfective inflammatory bowel disease
Inclusion terms
Conditions classified to this code.
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 18 entries
- Cecitis
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic), noninfective
- Diarrhea, diarrheal (disease) (infantile) (inflammatory), chronic (noninfectious)
- Diarrhea, diarrheal (disease) (infantile) (inflammatory), noninfectious
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective), chronic (noninfectious)
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective), noninfectious
- Enterocolitis
- Enterocolitis, noninfectious
- Gastroenteritis (acute) (chronic) (noninfectious)
- Gastroenteritis (acute) (chronic) (noninfectious), noninfectious