K55.051 Focal (segmental) acute (reversible) ischemia of intestine, part 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

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 K55.051

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 K55.051

• Ischemia, ischemic › intestine (large) (small) (transient) › acute › focal

Nearby codes

• 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
• K55.051 Focal (segmental) acute (reversible) ischemia of intestine, part unspecified (this code)
• K55.052 Diffuse acute (reversible) ischemia of intestine, part unspecified
• K55.059 Acute (reversible) ischemia of intestine, part and extent unspecified
• K55.06 Acute infarction of intestine, part unspecified
• K55.061 Focal (segmental) acute infarction of intestine, part unspecified
• K55.062 Diffuse acute infarction of intestine, part unspecified