K55.03
Acute (reversible) ischemia of large intestine
K55.03 is a non-billable ICD-10-CM code header for acute (reversible) ischemia of large intestine. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are K55.031 Focal (segmental) acute (reversible) ischemia of large intestine; K55.032 Diffuse acute (reversible) ischemia of large intestine and K55.039 Acute (reversible) ischemia of large intestine, extent unspecified. Its coding notes include 1 Excludes1 entry and 9 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- 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)
Inclusion terms
Conditions classified to this code.
- Acute fulminant ischemic colitis
- Subacute ischemic colitis