ICD-10 Code D31.00 – Benign neoplasm of unspecified conjunctiva (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31.00 – Benign neoplasm of unspecified conjunctiva
What it is
This code identifies a noncancerous growth of the conjunctiva, the thin membrane covering the white of the eye and inner eyelids. “Unspecified” means the record does not name the exact conjunctival site.
Clinical signs
Findings may include a visible conjunctival mass, localized thickening, or a stable pigmented or nonpigmented lesion. Clinical features vary; refer to documentation.
When to use this code
Use D31.00 when the provider documents a benign neoplasm of the conjunctiva but does not specify whether it is on the bulbar, palpebral, or caruncle area. It is also appropriate when the note confirms a benign conjunctival lesion and laterality or exact site is not documented. Check documentation if the lesion is described as suspicious, inflammatory, or malignant.
Do not use for
Do not use this code for malignant conjunctival tumors or for inflammatory, infectious, or traumatic conjunctival lesions. If the site is specified, code the more specific conjunctival neoplasm instead.
Coding tip
Query for the exact conjunctival site whenever possible, because unspecified coding should be a last resort.