ICD-10-CM > K00-K95 > K55-K64 > K55 > K55.0 > K55.03 K55.03 Acute (reversible) ischemia of large intestine Non-Billable/Non-Specific Applicable To Acute fulminant ischemic colitisSubacute ischemic colitis Codes K55.031Focal (segmental) acute (reversible) ischemia of large intestineK55.032Diffuse acute (reversible) ischemia of large intestineK55.039Acute (reversible) ischemia of large intestine, extent unspecified