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    v1.0.28
    OpenPayerBilling CodesMalignant neoplasms of digestive organsICD-10-CM c17-malignant-neoplasm-of-small-intestine
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    ICD-10-CM Code For Malignant Neoplasm Of Small Intestine: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group C17 includes malignant neoplasms of the small intestine, covering primary cancers of the duodenum, jejunum, ileum, and unspecified small intestine sites. These ICD-10-CM diagnosis codes are used to document primary small intestinal cancers and related clinical details such as tumor site, extension, and presence of metastasis. Accurate coding within the ICD-10-CM C17 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM C17: Malignant Neoplasm Of Small Intestine Overview

    The diagnoses in this group represent cancerous tumors originating in the small intestine, including specific sites such as the jejunum and ileum. These neoplasms affect the digestive system and can present with obstruction, bleeding, or metastatic spread. Accurate coding is important for clear clinical records and supports correct reimbursement and cancer registry reporting.

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    When to Use

    Use codes from this group when a clinician documents a confirmed primary malignant neoplasm of the small intestine or specifies a small intestinal site for a malignant tumor. Select the most specific code available that reflects the documented site and any described extension or metastatic involvement.

    ICD-10-CM Codes

    6 rows

    ICD-10-CM CodeDescription
    C17.0Malignant neoplasm of duodenum
    C17.1Malignant neoplasm of jejunum
    C17.2Malignant neoplasm of ileum
    C17.3Meckel's diverticulum, malignant
    C17.8Malignant neoplasm of overlapping sites of small intestine
    C17.9Malignant neoplasm of small intestine, unspecified

    DRG Codes

    3 rows

    DRG CodeDescription
    374Digestive Malignancy with MCC
    375Digestive Malignancy with CC
    376Digestive Malignancy without CC/MCC

    Typical Clinical Scenarios

    • An older adult presents to the emergency department with sudden, severe abdominal pain, profuse vomiting, and obstipation. Imaging and labs reveal small bowel obstruction with a proximal mass on CT and signs of bowel ischemia; surgical exploration finds a localized malignant tumor in the jejunum causing the obstruction. A diagnosis from this group is assigned to identify the primary malignant neoplasm of the small intestine discovered as the acute cause of obstruction. Typical codes: C17.2, C17.1
    • A middle-aged patient is followed longitudinally in oncology clinic after incidental endoscopic biopsy of a small intestinal lesion found during workup for iron-deficiency anemia. Pathology confirms a localized malignant tumor of the ileum without metastasis; the visit documents staging, surveillance imaging, and treatment planning. A code from this group is used to report the primary site of the chronic neoplastic condition for ongoing management and staging. Typical codes: C17.3, C17.9
    • A patient with known metastatic disease presents for palliative care with chronic abdominal pain, weight loss, and malabsorption; records show a previously diagnosed malignant tumor in the duodenum now complicated by intestinal bleeding and nutritional deficiency. Coding captures the primary malignant small intestinal neoplasm as the underlying condition contributing to these complications and care needs. Typical codes: C17.0, C17.8

    Related Codes

    C15-MALIGNANT-NEOPLASM-OF-ESOPHAGUS

    ICD-10-CM Code For Malignant Neoplasm Of Esophagus: Group Overview

    C16-MALIGNANT-NEOPLASM-OF-STOMACH

    ICD-10-CM Code For Malignant Neoplasm Of Stomach: Group Overview

    C18-MALIGNANT-NEOPLASM-OF-COLON

    ICD-10-CM Code For Malignant Neoplasm Of Colon: Group Overview

    C19-MALIGNANT-NEOPLASM-OF-RECTOSIGMOID-JUNCTION

    ICD-10-CM Code For Malignant Neoplasm Of Rectosigmoid Junction: Group Overview

    C20-MALIGNANT-NEOPLASM-OF-RECTUM

    ICD-10-CM Code For Malignant Neoplasm Of Rectum: Group Overview

    C21-MALIGNANT-NEOPLASM-OF-ANUS-AND-ANAL-CANAL

    ICD-10-CM Code For Malignant Neoplasm Of Anus And Anal Canal: Group Overview

    C22-MALIGNANT-NEOPLASM-OF-LIVER

    ICD-10-CM Code For Malignant Neoplasm Of Liver And Intrahepatic Bile Ducts: Group Overview

    C23-MALIGNANT-NEOPLASM-OF-GALLBLADDER

    ICD-10-CM Code For Malignant Neoplasm Of Gallbladder: Group Overview

    C24-MALIGNANT-NEOPLASM-BILIARY-TRACT

    ICD-10-CM Code For Malignant Neoplasm Of Other And Unspecified Parts Of Biliary Tract: Group Overview

    C26-MALIGNANT-NEOPLASM-OTHER-ILL-DEFINED-DIGESTIVE-ORGANS

    ICD-10-CM Code For Malignant Neoplasm Of Other And Ill-Defined Digestive Organs: 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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