ICD-10 Code D31.9 – Benign neoplasm of unspecified part of eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31.9 – Benign neoplasm of unspecified part of eye
What it is
D31.9 identifies a noncancerous growth in the eye when the exact site is not documented. Use this code when the record confirms a benign ocular neoplasm but does not specify the structure involved.
Clinical signs
Clinical features vary; refer to documentation. Benign eye tumors may be found on examination, imaging, or pathology, and may present with a visible mass, pigmentation, or incidental detection.
When to use this code
Use D31.9 when the provider documents a benign neoplasm of the eye and does not name a more specific part, such as conjunctiva, choroid, or retina. It also fits when the site is unclear in the final assessment. If the note later identifies the exact location, code that more specific diagnosis instead.
Do not use for
Do not use this code for malignant eye tumors, inflammatory lesions, or cysts. Also avoid it when the documentation names a specific ocular site that has its own code.
Coding tip
Check the assessment and pathology wording carefully; unspecified eye neoplasm codes should be used only when the site truly is not documented.