ICD-10 Code D31 – Benign neoplasm of eye and adnexa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31 – Benign neoplasm of eye and adnexa
What it is
D31 identifies a noncancerous growth in the eye or nearby adnexal structures, such as the eyelid, conjunctiva, or orbit. Use it when documentation states a benign neoplasm in this anatomic area.
Clinical signs
Clinical features vary; refer to documentation. These lesions may be noted as a visible mass, localized thickening, or incidental finding on eye examination, with pathology or specialist assessment supporting a benign diagnosis.
When to use this code
Use D31 when the record clearly documents a benign neoplasm of the eye or adnexa and no more specific subcategory is given. It may also support coding after specialist evaluation or biopsy confirms a benign lesion. If the site is specified, select the most precise code available within D31.
Do not use for
Do not use D31 for malignant, uncertain, or inflammatory eye conditions. If the documentation only says “mass,” “lesion,” or “tumor” without confirming benign behavior, check documentation.
Coding tip
Match the documented site and behavior carefully, and code the most specific D31 option only when the record supports a benign neoplasm.