ICD-10 Code D06 – Carcinoma in situ of cervix uteri (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D06 – Carcinoma in situ of cervix uteri
What it is
D06 identifies carcinoma in situ of the cervix, meaning abnormal cells are confined to the surface layer and have not invaded deeper tissue. Use it when documentation states cervical intraepithelial neoplasia or carcinoma in situ.
Clinical signs
Clinical features may be absent, and the finding is often detected on screening or colposcopy. If present, documentation may note an abnormal cervical cytology or biopsy showing noninvasive malignant change.
When to use this code
Use D06 when the provider documents carcinoma in situ of the cervix, including specified cervical sites if no more detailed code is given. It is also appropriate when pathology confirms a noninvasive cervical lesion and the record supports that diagnosis. Check documentation if the report only describes dysplasia without stating carcinoma in situ.
Do not use for
Do not use D06 for invasive cervical cancer or for nonspecific abnormal Pap results without a confirmed diagnosis. Do not assign it when the record says cervical dysplasia only and carcinoma in situ is not documented.
Coding tip
Match the code to the pathology wording; if the report does not clearly say carcinoma in situ, verify the diagnosis before coding.