ICD-10 Code E10.339 – Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.339 – Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema
What it is
This code identifies type 1 diabetes with moderate nonproliferative diabetic retinopathy in both eyes or one eye, and no macular edema. It tells you the diabetes has caused a specific retinal complication without swelling in the macula.
Clinical signs
Clinical features may include retinal microaneurysms, dot-blot hemorrhages, and other moderate nonproliferative changes. Vision may be unchanged or mildly affected; refer to ophthalmology documentation for laterality and edema status.
When to use this code
Use this code when the provider documents type 1 diabetes and moderate nonproliferative diabetic retinopathy, with macular edema specifically ruled out. It also fits when an eye specialist confirms this retinal stage in a diabetic patient. If the record does not clearly state the retinopathy severity or edema status, check documentation.
Do not use for
Do not use this code for proliferative diabetic retinopathy, mild or severe nonproliferative retinopathy, or any case with macular edema. If the eye findings are unspecified, choose a more general diabetic retinopathy code only when supported by documentation.
Coding tip
Confirm both the retinopathy severity and the absence of macular edema before assigning E10.339.