ICD-10 Code D12.4 – Benign neoplasm of descending colon (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D12.4 – Benign neoplasm of descending colon
What it is
This code identifies a noncancerous growth located in the descending colon. It is used when documentation states a benign neoplasm, polyp, or similar lesion in that specific segment.
Clinical signs
Clinical features vary; refer to documentation. These lesions may be found incidentally on colonoscopy or imaging, or they may be associated with bleeding, anemia, or change in bowel habits.
When to use this code
Use D12.4 when the provider documents a benign neoplasm in the descending colon and no malignant behavior is stated. You may also use it when pathology confirms a benign lesion in that site. Check documentation if the location is unclear or if the lesion is described only as a generic colonic polyp.
Do not use for
Do not use this code for malignant neoplasms, carcinoma in situ, or inflammatory bowel disease. If the record does not specify the descending colon, verify the anatomic site before coding.
Coding tip
Code the exact colon segment documented; if the report only says “colon,” query for the precise location.