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K50.1

K50.1: Crohn's disease of large intestine

Non-billable headerICD-10-CM

K50.1 is a non-billable header ICD-10-CM code for crohn's disease of large intestine. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

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

  • Crohn's disease of both small and large intestine (K50.8)

Inclusion terms

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

  • Crohn's disease [regional enteritis] of colon
  • Crohn's disease [regional enteritis] of large bowel
  • Crohn's disease [regional enteritis] of rectum
  • Granulomatous colitis
  • Regional colitis

Excludes1 inherited from the categories above K50.1

A category’s note binds every code beneath it.

Written on K50: Crohn's disease [regional enteritis]

  • ulcerative colitis (K51.-)

Other codes that can never be billed with K50.1

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

  • E55.0Rickets, active
  • K51Ulcerative colitis
  • K63.0Abscess of intestine
  • K63.2Fistula of intestine

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead K50.1

2 child codes. Green means billable.

Other codes under K50

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.