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    v1.0.28
    OpenPayerBilling CodesOther diseases of intestinesICD-10-CM k59-other-functional-intestinal-disorders
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    ICD-10-CM Code For Other Functional Intestinal Disorders: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K59 includes functional intestinal disorders such as constipation, irritable bowel syndrome, and other nonorganic bowel motility or function abnormalities. These ICD-10-CM diagnosis codes are used to document clinical presentations related to bowel function, symptom patterns, and the presence or absence of complicating features like obstruction or incontinence. Accurate coding within the ICD-10-CM K59 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM K59: Other Functional Intestinal Disorders Overview

    The ICD-10-CM K59 group captures functional disorders of the intestines that affect bowel motility and function rather than structural disease. These diagnoses target the gastrointestinal system, including conditions like constipation, irritable bowel syndrome, and other nonorganic intestinal dysfunctions. Accurate coding ensures clinical records reflect the functional nature of the disorder and supports appropriate reimbursement for services related to management and evaluation.

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    When to Use

    Use a code from this group when the clinical documentation indicates a functional intestinal disorder as the primary diagnosis affecting bowel motility or function. Select the specific K59 code that best reflects the documented symptoms, chronicity, and any noted complications or associated features.

    ICD-10-CM Codes

    14 rows

    ICD-10-CM CodeDescription
    K59.00Constipation, unspecified
    K59.01Slow transit constipation
    K59.02Outlet dysfunction constipation
    K59.03Drug induced constipation
    K59.04Chronic idiopathic constipation
    K59.09Other constipation
    K59.1Functional diarrhea
    K59.2Neurogenic bowel, not elsewhere classified
    K59.31Toxic megacolon
    K59.39Other megacolon
    K59.4Anal spasm
    K59.81Ogilvie syndrome
    K59.89Other specified functional intestinal disorders
    K59.9Functional intestinal disorder, unspecified

    DRG Codes

    5 rows

    DRG CodeDescription
    391Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC
    392Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC
    393Other Digestive System Diagnoses with MCC
    394Other Digestive System Diagnoses with CC
    395Other Digestive System Diagnoses without CC/MCC

    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

    K58-IRRITABLE-BOWEL-SYNDROME

    ICD-10-CM Code For Irritable Bowel Syndrome: 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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