ICD-10 Code D31.21 – Benign neoplasm of right retina (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31.21 – Benign neoplasm of right retina
What it is
D31.21 identifies a noncancerous growth in the right retina. Use it when the record documents a benign retinal tumor or mass limited to the right eye.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an incidental retinal lesion on eye exam, visual disturbance, or imaging evidence of a stable benign mass.
When to use this code
Use this code when the provider specifically documents a benign neoplasm of the right retina. It is appropriate for outpatient or inpatient records describing a confirmed retinal lesion in the right eye. If the note only says “retinal mass” or “lesion,” check documentation for laterality and benign behavior.
Do not use for
Do not use D31.21 for malignant retinal tumors, unspecified laterality, or lesions not confirmed as benign. If the growth involves another eye structure, choose the more specific documented site.
Coding tip
Verify both benign behavior and right-eye laterality before assigning D31.21.