ICD-10 Code C69.81 – Malignant neoplasm of overlapping sites of right eye and adnexa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C69.81 – Malignant neoplasm of overlapping sites of right eye and adnexa
What it is
This code identifies a malignant tumor affecting overlapping parts of the right eye and nearby adnexal structures. Use it when the documentation states the cancer spans more than one specified site in the right eye region.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a documented malignant mass, abnormal ocular lesion, or pathology confirming cancer in overlapping right eye and adnexal sites.
When to use this code
Use C69.81 when the provider documents a malignant neoplasm involving overlapping sites of the right eye and adnexa, and no more specific site code applies. It is appropriate for confirmed primary cancer of this anatomic region. If the record only says “right eye cancer,” check documentation before assigning this code.
Do not use for
Do not use this code for benign lesions, uncertain masses, or cancers limited to a single, more specific eye site. Check documentation if the record describes metastasis or an unspecified eye neoplasm.
Coding tip
Code the most specific site documented, and use C69.81 only when the tumor truly overlaps multiple right eye/adnexal sites.