ICD-10 Code D31.91 – Benign neoplasm of unspecified part of right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31.91 – Benign neoplasm of unspecified part of right eye
What it is
This code identifies a noncancerous tumor in an unspecified part of the right eye. Use it when the record confirms a benign eye neoplasm but does not name the exact ocular structure.
Clinical signs
Findings may include a visible ocular mass, localized discoloration, or incidental discovery during eye examination. Clinical features vary; refer to documentation for the exact site and appearance.
When to use this code
Use D31.91 when the provider documents a benign neoplasm of the right eye and does not specify whether it involves the conjunctiva, cornea, retina, or another part. It also fits when laterality is clear, but the precise anatomic site is not. Check documentation if the lesion is described only as suspicious or undetermined.
Do not use for
Do not use this code for malignant eye tumors, inflammatory lesions, or traumatic eye masses. If the site is specified elsewhere in the right eye, code the more precise location instead.
Coding tip
Always confirm both laterality and the exact eye structure; unspecified site codes are appropriate only when the record leaves the anatomy unclear.