K55.9
Vascular disorder of intestine, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 5 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 10 never code together
K55code
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
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 3
K55.9code
Inclusion terms
- Ischemic colitis
- Ischemic enteritis
- Ischemic enterocolitis
Index entries leading here 7
- Syndrome — see also Disease
- ischemic
- bowel (transient) K55.9
- ischemic
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) K52.9
- ischemic K55.9
- Disorder (of) — see also Disease
- intestine, intestinal
- vascular K55.9
- intestine, intestinal
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
- ischemic K55.9
- Enterocolitis K52.9
- ischemic K55.9
- Insufficiency, insufficient
- Ischemia, ischemic I99.8
- intestine (large) (small) (transient) K55.9
Alongside this code 5 same parent — K55
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.