ICD-10 Code D31.4 – Benign neoplasm of ciliary body (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31.4 – Benign neoplasm of ciliary body
What it is
D31.4 identifies a noncancerous growth arising in the ciliary body, the eye structure behind the iris. Use it when documentation clearly states a benign ciliary body tumor or nevus.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an incidental intraocular mass, pigment change, or secondary effects on vision or eye pressure, but the record must support the diagnosis.
When to use this code
Use D31.4 when the provider documents a benign neoplasm of the ciliary body, including a confirmed benign tumor or lesion of that site. It also fits follow-up visits for a known lesion when the diagnosis remains active. Check documentation if the note only says “eye mass” or “intraocular lesion.”
Do not use for
Do not use this code for malignant eye tumors, unspecified ocular neoplasms, or lesions in other ocular structures. If the site or behavior is unclear, check documentation.
Coding tip
Confirm both behavior and anatomic site in the note before assigning D31.4.