Reserved for future guideline expansion
K91.850
BookmarkPouchitis
Filed alongside this entry 50
under Inflammation, inflamed, inflammatory (with exudation)
- adrenal (gland) E27.8
- alveoli, teeth M27.3
- anal canal, anus K62.89
- areola N61.0
- areolar tissue NOS L08.9
- Bartholin's gland N75.8
- breast N61.0
- catarrhal J00
- chest J98.8
- chorioretinal H30.9
- corpora cavernosa N48.29
- Douglas' cul-de-sac or pouch (chronic) N73.0
- duodenum K29.80
- eyelid H01.9
- follicular, pharynx J31.2
- granular, pharynx J31.2
- gum K05.10
- ileoanal (internal) pouch K91.850
- intestinal pouch K91.850
- jaw (acute) (bone) (chronic) (lower) (suppurative) (upper) M27.2
- knee (joint) M13.169
- leg NOS L08.9
- lip K13.0
- maxilla, maxillary M27.2
- mouth K12.1
- navel L08.82
- nipple N61.0
- orbit (chronic) H05.10
- parametrium N73.0
- parotid region L08.9
- penis (corpora cavernosa) N48.29
- perianal K62.89
- perineum (female) (male) L08.9
- perirectal K62.89
- polyp, colon K51.40
- rectum K62.89
- respiratory, upper J06.9
- scorbutic, alveoli, teeth E54
- scrotum N49.2
- skin L08.9
- spermatic cord N49.1
- spleen (capsule) D73.89
- subcutaneous tissue L08.9
- suprarenal (gland) E27.8
- thymus (gland) E32.8
- tongue K14.0
- tunica vaginalis N49.1
- umbilicus, umbilical L08.82
- vas deferens N49.1
- vocal cord J38.3
Index entries, exactly as the book files them. This says they are listed together — not that any of them is documented in your chart.
Billable FY2027 2026-10-01 → 2027-09-30
How to use this page
Everything the published sources say about one code, on one page.
- Read the Excludes1 block first — it is the one that stops you coding this at all alongside another code.
- Excludes2, Code first, Use additional and Includes follow. A note inherited from a parent category is labelled with the category it came from, so you can see why it applies.
- Official Guidelines sit below. "Guidelines naming this code" cite the code or a range containing it; "Chapter guidance" is the general guidance for its chapter and is the weaker signal.
- Guideline text is quoted verbatim with its section number and page, so you can check it against the published document.
- Risk-model chips show which published CMS models map this code.
What this page does not do
- Guidance is quoted, never paraphrased — a paraphrase of a coding rule is a different rule.
- Medication candidates, where shown, are matched by condition *name* and are offered as candidates for you to judge. They are not "the drugs for this code".
Exclusions15never code together
K91code
Excludes2
- complications of artificial opening of digestive system (K94.-)K94.-
- complications of bariatric procedures (K95.-)K95.-
- gastrojejunal ulcer (K28.-)K28.-
- postprocedural (radiation) retroperitoneal abscess (K68.11)K68.11
- radiation colitis (K52.0)K52.0
- radiation gastroenteritis (K52.0)K52.0
- radiation proctitis (K62.7)K62.7
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes1
K91.850code
Inclusion terms
- Inflammation of internal ileoanal pouch
Official Guidelines1names this code
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Index entries leading here2
Alongside this code1same parent — K91.85
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.