MCMedicalCodingSoftware
K91.858

K91.858: Other complications of intestinal pouch

Billable / specific codeICD-10-CM

K91.858 is a billable, specific ICD-10-CM code for other complications of intestinal pouch. It is valid for submission on a claim.

Check K91.858 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above K91.858

Not part of this code, but both may be coded when both are present.

Written on K91: Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

  • complications of artificial opening of digestive system (K94.-)
  • complications of bariatric procedures (K95.-)
  • gastrojejunal ulcer (K28.-)
  • postprocedural (radiation) retroperitoneal abscess (K68.11)
  • radiation colitis (K52.0)
  • radiation gastroenteritis (K52.0)
  • radiation proctitis (K62.7)

Risk adjustment

K91.858 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 463 Artificial Openings for Feeding or Elimination0.673 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

K91.858 is named in 6 Medicare coverage policies: 6 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A55937Billing and Coding: Diagnostic Colonoscopy
  • A56421Billing and Coding: CT of the Abdomen and Pelvis
  • A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
  • A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

Alphabetic index entries that lead here

  • Complication›intestinal pouch NEC

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under K91.85

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.