K55.039 Acute (reversible) ischemia of large intestine, extent unspecified

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applies from K55 Vascular disorders of intestine

Excludes1 (never code together)

• necrotizing enterocolitis of newborn (P77.-)

Excludes2 (not included here)

• angioectasia (angiodysplasia) duodenum (K31.81-)

Applies from K55.0 Acute vascular disorders of intestine

Applicable to

• Infarction of appendices epiploicae
• Mesenteric (artery) (vein) embolism
• Mesenteric (artery) (vein) infarction
• Mesenteric (artery) (vein) thrombosis

Applies from K55.03 Acute (reversible) ischemia of large intestine

Applicable to

• Acute fulminant ischemic colitis
• Subacute ischemic colitis

Risk adjustment (HCC)

• CMS-HCC V22: HCC 107 — Vascular Disease with Complications
• ESRD V24: HCC 107

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 557.0 Acute vascular insufficiency of intestine (approximate)

Code annotations containing back-references to K55.039

Back-references to K55.0

• Type 2 Excludes: I74 Arterial embolism and thrombosis ("mesenteric embolism and thrombosis (K55.0-)")
• Type 2 Excludes: I82 Other venous embolism and thrombosis ("mesenteric (K55.0-)")

Diagnosis Index entries for K55.039

• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › ischemic › acute (subacute)
• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › ischemic › fulminant (acute)
• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › subacute ischemic
• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › thromboulcerative
• Disease, diseased › colon › ischemic
• Disease, diseased › mesenteric embolic
• Embolism (multiple) (paradoxical) › intestine (artery) (vein) (with gangrene)
• Ischemia, ischemic › intestine (large) (small) (transient) › acute › large

Nearby codes

• K55.022 Diffuse acute infarction of small intestine
• K55.029 Acute infarction of small intestine, extent unspecified
• K55.03 Acute (reversible) ischemia of large intestine
• K55.031 Focal (segmental) acute (reversible) ischemia of large intestine
• K55.032 Diffuse acute (reversible) ischemia of large intestine
• K55.039 Acute (reversible) ischemia of large intestine, extent unspecified (this code)
• K55.04 Acute infarction of large intestine
• K55.041 Focal (segmental) acute infarction of large intestine
• K55.042 Diffuse acute infarction of large intestine
• K55.049 Acute infarction of large intestine, extent unspecified
• K55.05 Acute (reversible) ischemia of intestine, part unspecified