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K51.012

K51.012: Ulcerative (chronic) pancolitis with intestinal obstruction

Billable / specific codeICD-10-CM

K51.012 is a billable, specific ICD-10-CM code for ulcerative (chronic) pancolitis with intestinal obstruction. It is valid for submission on a claim.

Check K51.012 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above K51.012

A category’s note binds every code beneath it.

Written on K51: Ulcerative colitis

  • Crohn's disease [regional enteritis] (K50.-)

Other codes that can never be billed with K51.012

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

  • K50Crohn's disease [regional enteritis]
  • K62.6Ulcer of anus and rectum
  • K63.3Ulcer of intestine

Risk adjustment

K51.012 risk-adjusts. Under the CMS-HCC V28 model it maps to these categories:

  • HCC 78 Intestinal Obstruction/Perforation0.326 RAF
  • HCC 81 Ulcerative Colitis0.244 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

K51.012 is named in 25 Medicare coverage policies: 25 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52423Billing and Coding: Infliximab and biosimilars
  • A55937Billing and Coding: Diagnostic Colonoscopy
  • A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
  • A56416Billing and Coding: Assays for Vitamins and Metabolic Function

Alphabetic index entries that lead here

  • Pancolitis›ulcerative›with›obstruction

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under K51.01

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.