K55.059 Acute (reversible) ischemia of intestine, part and extent unspecified

The ICD-10-CM code for Acute (reversible) ischemia of intestine, part and extent unspecified is K55.059 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

11: Diseases of the digestive system (K00-K95)

Section

K55-K64: Other diseases of intestines (K55-K64)

Category K55

37 codes (27 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K55.059:

• Narrowing › mesenteric artery
• Enterocolitis › fulminant ischemic
• Enteropathy › hemorrhagic, terminal
• Embolism (multiple) (paradoxical) › mesenteric (artery) (vein) (with gangrene)
• Ischemia, ischemic › mesenteric, acute
• Enterocolitis › hemorrhagic (acute)
• Embolism (multiple) (paradoxical) › artery › mesenteric (with gangrene)
• Ischemia, ischemic › bowel (transient) › acute

U.S. Hospital Utilization

• An estimated 18,595 U.S. inpatient stays in 2023 included K55.059 among the documented diagnoses.
• 3,130 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)