K51.312

K51.312: Ulcerative (chronic) rectosigmoiditis with intestinal obstruction

Billable / specific codeICD-10-CM

K51.312 is a billable, specific ICD-10-CM code for ulcerative (chronic) rectosigmoiditis with intestinal obstruction. It is valid for submission on a claim.

Check K51.312 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above K51.312

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 K51.312

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

K51.312 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

K51.312 is named in 24 Medicare coverage policies: 24 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

Rectosigmoiditis›ulcerative›with›complication›obstruction

Code history

Unchanged in every release from FY2024 to FY2027.