ICD-10 Code D12.6 – Benign neoplasm of colon, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D12.6 – Benign neoplasm of colon, unspecified
What it is
D12.6 identifies a noncancerous tumor of the colon when the site is not further specified. Use it for a benign colonic neoplasm documented without a more precise location.
Clinical signs
Clinical features vary; refer to documentation. These lesions are often found on colonoscopy or pathology and may be described as a benign polyp or mass without evidence of malignancy.
When to use this code
Use D12.6 when the provider documents a benign neoplasm of the colon but does not identify the segment, such as cecum, ascending, or sigmoid colon. It also fits pathology or endoscopy reports that confirm benign histology with no more specific site.
Do not use for
Do not use this code for malignant colon tumors, dysplasia, or inflammatory bowel disease. If the report names a specific colon site, code the more specific benign neoplasm category instead.
Coding tip
Check the pathology or procedure report for the exact colon location before choosing the unspecified code.