ICD-10 Code D05.11 – Intraductal carcinoma in situ of right breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D05.11 – Intraductal carcinoma in situ of right breast
What it is
D05.11 identifies ductal carcinoma in situ confined to the right breast. The abnormal cells are noninvasive and remain within the milk ducts.
Clinical signs
Clinical features vary; refer to documentation. It is often found on breast imaging or biopsy, and may present with a breast mass, nipple discharge, or calcifications.
When to use this code
Use this code when the record specifically documents intraductal carcinoma in situ in the right breast. Apply it after pathology or provider documentation confirms the right-sided site. If laterality is not clear, check documentation before coding.
Do not use for
Do not use it for invasive breast cancer or for carcinoma in situ in the left breast, bilateral breast, or unspecified breast. Check documentation if the site or behavior is unclear.
Coding tip
Always verify laterality in the pathology or operative report before assigning D05.11.