K91.850

Pouchitis

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC463

Artificial Openings for Feeding or Elimination

CMS-HCC ESRD V24

HCC188

Artificial Openings for Feeding or Elimination

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · K91.850

Synonyms

Inflammation of internal ileoanal pouch

Inherited from K91Intraop and postproc comp and disorders of dgstv sys, NEC

Excludes 2

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)

Inherited from chapter 11Diseases of the digestive system

Excludes 2

certain conditions originating in the perinatal period (P04-P96) certain infectious and parasitic diseases (A00-B99) complications of pregnancy, childbirth and the puerperium (O00-O9A) congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Official Guidelines for K91.850

FY 2026 ›

I.C.11Chapter-specific guidanceChapter 11: Diseases of the Digestive System (K00-K95)

Find K91.850 in the alphabetic index

3 index paths lead to this code