ICD-10 Code C17.3 – Meckel’s diverticulum, malignant (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C17.3 – Meckel’s diverticulum, malignant
What it is
This code identifies a malignant neoplasm arising in Meckel’s diverticulum, a congenital outpouching of the small intestine. Use it when documentation states the diverticulum itself is cancerous.
Clinical signs
Findings may include abdominal pain, gastrointestinal bleeding, obstruction, or a palpable mass. Clinical features vary; refer to documentation and pathology when available.
When to use this code
Use this code when the provider documents a primary malignant tumor specifically located in Meckel’s diverticulum. It is appropriate when imaging, endoscopy, surgery, or pathology confirms malignancy at that site. Code only what is documented.
Do not use for
Do not use this code for benign Meckel’s diverticulum, inflammation, or nonspecific small-intestine cancer without site confirmation. Check documentation if the record does not clearly state malignant involvement.
Coding tip
Verify that the malignancy is documented as originating in Meckel’s diverticulum before assigning C17.3.