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    v1.0.28
    OpenPayerBilling CodesOther diseases of intestinesICD-10-CM k55-vascular-disorders-of-intestine
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    ICD-10-CM Code For Vascular Disorders Of Intestine: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K55 includes diagnoses for intestinal vascular disorders such as acute and chronic intestinal ischemia, mesenteric vascular insufficiency, and intestinal infarction that affect blood flow to the bowel. These ICD-10-CM diagnosis codes are used to document clinical scenarios including acute ischemic events, chronic mesenteric ischemia with progressive symptoms, and ischemic injury with or without intestinal necrosis, capturing disease severity and organ involvement. Accurate coding within the ICD-10-CM K55 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM K55: Vascular Disorders Of Intestine Overview

    The ICD-10-CM K55 group captures vascular disorders affecting the intestines, including acute and chronic ischemia, vascular insufficiency, and infarction of intestinal segments. These conditions target the gastrointestinal tract vasculature and can lead to bowel ischemia, necrosis, or chronic malabsorption. Accurate coding matters for appropriate claim adjudication and to reflect the clinical complexity that influences reimbursement.

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    When to Use

    Use codes from this group when documentation indicates vascular compromise of the intestines such as acute mesenteric ischemia, chronic mesenteric ischemia causing postprandial pain and weight loss, or documented intestinal infarction. Select the code that reflects acuity, laterality or segment involved, and any associated complications like necrosis or gangrene as documented in the clinical record.

    ICD-10-CM Codes

    27 rows

    ICD-10-CM CodeDescription
    K55.011Focal (segmental) acute (reversible) ischemia of small intestine
    K55.012Diffuse acute (reversible) ischemia of small intestine
    K55.019Acute (reversible) ischemia of small intestine, extent unspecified
    K55.021Focal (segmental) acute infarction of small intestine
    K55.022Diffuse acute infarction of small intestine
    K55.029Acute infarction of small intestine, extent unspecified
    K55.031Focal (segmental) acute (reversible) ischemia of large intestine
    K55.032Diffuse acute (reversible) ischemia of large intestine
    K55.039Acute (reversible) ischemia of large intestine, extent unspecified
    K55.041Focal (segmental) acute infarction of large intestine
    K55.042Diffuse acute infarction of large intestine
    K55.049Acute infarction of large intestine, extent unspecified
    K55.051Focal (segmental) acute (reversible) ischemia of intestine, part unspecified
    K55.052Diffuse acute (reversible) ischemia of intestine, part unspecified
    K55.059Acute (reversible) ischemia of intestine, part and extent unspecified
    K55.061Focal (segmental) acute infarction of intestine, part unspecified
    K55.062Diffuse acute infarction of intestine, part unspecified
    K55.069Acute infarction of intestine, part and extent unspecified
    K55.1Chronic vascular disorders of intestine
    K55.20Angiodysplasia of colon without hemorrhage

    Showing 1–20 of 27

    DRG Codes

    8 rows

    DRG CodeDescription
    377Gastrointestinal Hemorrhage with MCC
    378Gastrointestinal Hemorrhage with CC
    379Gastrointestinal Hemorrhage without CC/MCC
    393Other Digestive System Diagnoses with MCC
    394Other Digestive System Diagnoses with CC
    395Other Digestive System Diagnoses without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Typical Clinical Scenarios

    • An elderly patient with sudden onset of severe abdominal pain, bloody stools, and hypotension presents to the emergency department after a period of atrial fibrillation without anticoagulation. CT angiography shows occlusion of mesenteric vessels with segmental small bowel ischemia requiring urgent revascularization or bowel resection; a vascular intestinal ischemic diagnosis is assigned for the acute presentation. Typical codes: K55.011, K55.019.
    • A middle-aged patient with known peripheral atherosclerotic disease and chronic postprandial abdominal pain and weight loss is evaluated in clinic for suspected chronic mesenteric ischemia. Noninvasive vascular testing and imaging demonstrate chronic intestinal hypoperfusion without infarction, so a chronic vascular disorder of the intestine diagnosis is used to document the ongoing ischemic condition. Typical codes: K55.20, K55.21.
    • A hospitalized patient recovering from major cardiac surgery develops sudden onset abdominal distension and metabolic acidosis; imaging reveals nonocclusive mesenteric ischemia and patchy bowel infarction as a postoperative complication. The vascular intestinal diagnosis is assigned to capture ischemia related to low-flow states and postoperative complications requiring close monitoring and possible surgical intervention. Typical codes: K55.31, K55.32.

    Related Codes

    K56-PARALYTIC-ILEUS-AND-INTESTINAL-OBSTRUCTION

    ICD-10-CM Code For Paralytic Ileus And Intestinal Obstruction Without Hernia: Group Overview

    K57-DIVERTICULAR-DISEASE-OF-INTESTINE

    ICD-10-CM Code For Diverticular Disease Of Intestine: Group Overview

    K58-IRRITABLE-BOWEL-SYNDROME

    ICD-10-CM Code For Irritable Bowel Syndrome: Group Overview

    K59-OTHER-FUNCTIONAL-INTESTINAL-DISORDERS

    ICD-10-CM Code For Other Functional Intestinal Disorders: Group Overview

    K60-FISSURE-AND-FISTULA-ANAL-RECTAL

    ICD-10-CM Code For Fissure And Fistula Of Anal And Rectal Regions: Group Overview

    K61-ABSCESS-OF-ANAL-AND-RECTAL-REGIONS

    ICD-10-CM Code For Abscess Of Anal And Rectal Regions: Group Overview

    K62-OTHER-DISEASES-OF-ANUS-AND-RECTUM

    ICD-10-CM Code For Other Diseases Of Anus And Rectum: Group Overview

    K63-OTHER-DISEASES-OF-INTESTINE

    ICD-10-CM Code For Other Diseases Of Intestine: Group Overview

    K64-HEMORRHOIDS-AND-PERIANAL-VENOUS-THROMBOSIS

    ICD-10-CM Code For Hemorrhoids And Perianal Venous Thrombosis: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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