K55.02

Acute infarction of small intestine

FY2027Chapter 11: Diseases of the digestive system/K55–K64 Other diseases of intestines

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

K55.02 is a non-billable ICD-10-CM code header for acute infarction of small 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 K55.021 Focal (segmental) acute infarction of small intestine; K55.022 Diffuse acute infarction of small intestine and K55.029 Acute infarction of small 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.

Inherited from K55 Vascular disorders of intestine
  • necrotizing enterocolitis of newborn (P77.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from K55 Vascular disorders of intestine
  • angioectasia (angiodysplasia) duodenum (K31.81-)
Also from chapter/block level (8 notes)
Inherited from Chapter 11 Diseases of the digestive system
  • 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.

This code
  • Gangrene of small intestine
  • Necrosis of small intestine

More specific codes under K55.02 3