ICD-10 Code E10.329 – Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.329 – Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema
What it is
This code identifies type 1 diabetes complicated by mild nonproliferative diabetic retinopathy in one or both eyes, without macular edema. It tells you the eye disease is present, but the retina has not reached a proliferative stage.
Clinical signs
Findings may include microaneurysms or small retinal hemorrhages on eye examination. Clinical features vary; refer to documentation, and confirm that macular edema is not documented.
When to use this code
Use this code when the record clearly links type 1 diabetes to mild nonproliferative diabetic retinopathy and states there is no macular edema. It is appropriate for routine ophthalmology or diabetes follow-up documentation when the retinal stage is specified. Check documentation if laterality or severity is unclear.
Do not use for
Do not use this code if the chart describes proliferative retinopathy, macular edema, or a different diabetes type. If the eye finding is only suspected or not linked to diabetes, check documentation.
Coding tip
Verify both the diabetes type and the exact retinopathy stage before assigning E10.329.