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    v1.0.28
    OpenPayerBilling CodesBenign neoplasms, except benign neuroendocrine tumorsICD-10-CM d13-benign-neoplasm-other-digestive
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    ICD-10-CM Code For Benign Neoplasm Of Other And Ill-Defined Parts Of Digestive System: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group D13 includes benign neoplasms of other and ill-defined parts of the digestive system, covering nonmalignant tumors located in less specifically classified regions of the gastrointestinal tract. These ICD-10-CM diagnosis codes are used to document clinical encounters involving benign digestive tract tumors, capturing lesion location, extent, and any related clinical complexity relevant to this group. Accurate coding within the ICD-10-CM D13 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM D13: Benign Neoplasm Of Other And Ill-Defined Parts Of Digestive System Overview

    This group includes benign tumors arising in less commonly specified or anatomically ill-defined portions of the digestive tract, such as portions of the small intestine, colon, rectum, and other digestive structures. These diagnoses target the digestive system and distinguish nonmalignant growths from malignant neoplasms and benign neuroendocrine tumors. Accurate coding matters for correct claim processing and to reflect the clinical diagnosis for appropriate reimbursement and clinical records.

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    When to Use

    Use a code from this group when a clinician documents a benign tumor in an anatomically unspecific or less well-defined area of the digestive tract and no more specific code applies. Select the most precise code available in the D13 series to reflect the documented site and clinical details for billing and recordkeeping.

    ICD-10-CM Codes

    11 rows

    ICD-10-CM CodeDescription
    D13.0Benign neoplasm of esophagus
    D13.1Benign neoplasm of stomach
    D13.2Benign neoplasm of duodenum
    D13.30Benign neoplasm of unspecified part of small intestine
    D13.39Benign neoplasm of other parts of small intestine
    D13.4Benign neoplasm of liver
    D13.5Benign neoplasm of extrahepatic bile ducts
    D13.6Benign neoplasm of pancreas
    D13.7Benign neoplasm of endocrine pancreas
    D13.91Familial adenomatous polyposis
    D13.99Benign neoplasm of ill-defined sites within the digestive system

    DRG Codes

    12 rows

    DRG CodeDescription
    393Other Digestive System Diagnoses with MCC
    394Other Digestive System Diagnoses with CC
    395Other Digestive System Diagnoses without CC/MCC
    438Disorders of Pancreas Except Malignancy with MCC
    439Disorders of Pancreas Except Malignancy with CC
    440Disorders of Pancreas Except Malignancy without CC/MCC
    441Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC
    442Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC
    443Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC
    643Endocrine Disorders with MCC
    644Endocrine Disorders with CC
    645Endocrine Disorders without CC/MCC

    Typical Clinical Scenarios

    • An adult patient in primary care with intermittent abdominal bloating and occasional mild rectal bleeding undergoes colonoscopy which identifies a pedunculated benign-appearing polyp in the sigmoid colon; histopathology confirms a nonneoplastic benign mucosal tumor without dysplasia, so a benign neoplasm code for the colon is assigned. Typical codes: D13.5
    • An elderly patient presents to the emergency department with painless jaundice and weight loss; imaging reveals a localized mass in the ampullary region of the duodenum causing biliary obstruction, biopsy shows a benign neoplasm of the duodenum, and a specific duodenal benign neoplasm code is used to capture the diagnosis and guide further surgical planning. Typical codes: D13.0, D13.2
    • A middle-aged patient with a history of prior endoscopic polypectomy of the rectum returns for surveillance and is found to have multiple small benign-appearing sessile lesions in the rectosigmoid junction on flexible sigmoidoscopy; these are documented as benign neoplasms of the rectum and rectosigmoid, coded to reflect the nonmalignant lesions as comorbid benign tumors. Typical codes: D13.4, D13.5

    Related Codes

    D10-BENIGN-NEOPLASM-OF-MOUTH-AND-PHARYNX

    ICD-10-CM Code For Benign Neoplasm Of Mouth And Pharynx: Group Overview

    D11-BENIGN-NEOPLASM-MAJOR-SALIVARY-GLANDS

    ICD-10-CM Code For Benign Neoplasm Of Major Salivary Glands: Group Overview

    D12-BENIGN-NEOPLASM-COLON-RECTUM-ANUS

    ICD-10-CM Code For Benign Neoplasm Of Colon Rectum Anus And Anal Canal: Group Overview

    D14-BENIGN-MIDDLE-EAR-AND-RESPIRATORY-NEOPLASMS

    ICD-10-CM Code For Benign Neoplasm Of Middle Ear And Respiratory System: Group Overview

    D15-BENIGN-NEOPLASM-INTRATHORACIC-ORGANS

    ICD-10-CM Code For Benign Neoplasm Of Other And Unspecified Intrathoracic Organs: Group Overview

    D16-BENIGN-NEOPLASM-OF-BONE

    ICD-10-CM Code For Benign Neoplasm Of Bone And Articular Cartilage: Group Overview

    D17-BENIGN-LIPOMATOUS-NEOPLASM

    ICD-10-CM Code For Benign Lipomatous Neoplasm: Group Overview

    D18-HEMANGIOMA-AND-LYMPHANGIOMA

    ICD-10-CM Code For Hemangioma And Lymphangioma, Any Site: Group Overview

    D19-BENIGN-MESOTHELIAL-NEOPLASMS

    ICD-10-CM Code For Benign Neoplasm Of Mesothelial Tissue: Group Overview

    D20-BENIGN-SOFT-TISSUE-RETROPERITONEUM

    ICD-10-CM Code For Benign Neoplasm Of Soft Tissue Of Retroperitoneum And Peritoneum: Group Overview

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    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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