ICD-10-CM > E00-E89 > E08-E13 > E13 > E13.3 > E13.32 > E13.321 E13.321 Other specified diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema Non-Billable/Non-Specific Codes E13.3211..., right eyeE13.3212..., left eyeE13.3213..., bilateralE13.3219..., unspecified eye