ICD-10 Code D06.0 – Carcinoma in situ of endocervix (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D06.0 – Carcinoma in situ of endocervix
What it is
D06.0 identifies carcinoma in situ confined to the endocervix. It means abnormal cells are present in the glandular lining of the cervical canal, but there is no documented invasion beyond the surface layer.
Clinical signs
Clinical features vary; refer to documentation. It is often found on cervical screening, colposcopy, or biopsy rather than by symptoms alone, and pathology should confirm the in situ diagnosis.
When to use this code
Use D06.0 when the record specifically states carcinoma in situ of the endocervix, including pathology-confirmed endocervical intraepithelial disease. Code it when the lesion is limited to the endocervical epithelium and no invasive cancer is documented.
If the documentation only says cervical dysplasia, abnormal Pap test, or lesion of uncertain behavior, do not assume D06.0. Check documentation for the exact site and whether the finding is in situ.
Do not use for
Do not use this code for invasive cervical cancer, unspecified cervical carcinoma in situ, or dysplasia without a stated in situ diagnosis. Check documentation when the site is not clearly endocervical.
Coding tip
Verify both the anatomic site and the pathology wording before assigning D06.0.