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    v1.0.28
    OpenPayerBilling CodesOther diseases of intestinesICD-10-CM k58-irritable-bowel-syndrome
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    ICD-10-CM Code For Irritable Bowel Syndrome: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K58 includes diagnoses for irritable bowel syndrome and its subtypes, covering functional gastrointestinal disorder presentations such as abdominal pain with diarrhea or constipation and mixed bowel habits. These ICD-10-CM diagnosis codes are used to document clinical scenarios including symptom pattern, subtype specification, and severity or chronicity relevant to irritable bowel syndrome. Accurate coding within the ICD-10-CM K58 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM K58: Irritable Bowel Syndrome Overview

    The ICD-10-CM K58 group covers irritable bowel syndrome diagnoses affecting the gastrointestinal system, characterized by chronic abdominal pain and altered bowel habits. These codes distinguish between subtypes such as diarrhea-predominant and constipation-predominant presentations and capture disease complexity. Accurate coding matters for appropriate reimbursement and complete clinical records that reflect patient management needs.

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    When to Use

    Use a code from this group when the clinical record documents a diagnosis of irritable bowel syndrome with specification of subtype or predominant bowel habit. Select the code that matches the documented presentation and any stated chronicity or acute exacerbation details.

    ICD-10-CM Codes

    5 rows

    ICD-10-CM CodeDescription
    K58.0Irritable bowel syndrome with diarrhea
    K58.1Irritable bowel syndrome with constipation
    K58.2Mixed irritable bowel syndrome
    K58.8Other irritable bowel syndrome
    K58.9Irritable bowel syndrome, unspecified

    DRG Codes

    2 rows

    DRG CodeDescription
    391Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC
    392Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC

    Typical Clinical Scenarios

    • A 28-year-old woman presents to primary care with a 6-month history of recurrent abdominal cramping, bloating, and alternating diarrhea and constipation that worsen with stress; symptoms are chronic, meet Rome criteria for irritable bowel syndrome, and no alarming features or evidence of inflammatory disease are found, so a functional bowel disorder diagnosis from this group is assigned. Typical codes: K58.0, K58.9
    • A 45-year-old man arrives at the emergency department with acute onset of severe watery diarrhea and diffuse abdominal cramping after a recent dietary change; dehydration is mild, laboratory and imaging exclude infectious or inflammatory causes, and the clinician documents an IBS flare predominantly with diarrhea to guide symptomatic management. Typical codes: K58.1, K58.9
    • A 60-year-old patient with longstanding irritable bowel symptoms presents for preoperative evaluation before elective hernia repair and reports persistent constipation-predominant symptoms that complicate bowel regimen and perioperative planning; the chronic functional bowel disorder is recorded as a comorbidity affecting perioperative care. Typical codes: K58.2, K58.8

    Related Codes

    K55-VASCULAR-DISORDERS-OF-INTESTINE

    ICD-10-CM Code For Vascular Disorders Of Intestine: Group Overview

    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

    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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