ICD-10-CM > E00-E89 > E08-E13 > E10 > E10.3 > E10.32 > E10.321 E10.321 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema Non-Billable/Non-Specific Codes E10.3211..., right eyeE10.3212..., left eyeE10.3213..., bilateralE10.3219..., unspecified eye