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K52.9

K52.9: Noninfective gastroenteritis and colitis, unspecified

Billable / specific codeICD-10-CM

K52.9 is a billable, specific ICD-10-CM code for noninfective gastroenteritis and colitis, unspecified. It is valid for submission on a claim.

Check K52.9 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • diarrhea NOS (R19.7)
  • functional diarrhea (K59.1)
  • infectious gastroenteritis and colitis NOS (A09)
  • neonatal diarrhea (noninfective) (P78.3)
  • psychogenic diarrhea (F45.8)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Colitis NOS
  • Enteritis NOS
  • Gastroenteritis NOS
  • Ileitis NOS
  • Jejunitis NOS
  • Sigmoiditis NOS

Other codes that can never be billed with K52.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • K52.3Indeterminate colitis
  • A09Infectious gastroenteritis and colitis, unspecified

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

K52.9 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A55937Billing and Coding: Diagnostic Colonoscopy
  • A56389Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization
  • A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
  • A56421Billing and Coding: CT of the Abdomen and Pelvis

Alphabetic index entries that lead here

  • Cecitis
  • Colitis(acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
  • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
  • Enterocolitis
  • Gastroenteritis(acute) (chronic) (noninfectious)
  • Gastroenteropathy
  • Gastrojejunitis
  • Ileitis(chronic) (noninfectious)
  • Ileocolitis
  • Sigmoiditis
  • Colitis›noninfective
  • Diarrhea, diarrheal›chronic(noninfectious)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under K52

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.