ICD-10 Code E08.339 – Diabetes mellitus due to underlying condition with moderate nonproliferative diabetic retinopathy without macular edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.339 – Diabetes mellitus due to underlying condition with moderate nonproliferative diabetic retinopathy without macular edema
What it is
This code identifies diabetes mellitus caused by another underlying condition, with moderate nonproliferative diabetic retinopathy in both eyes and no macular edema. Use it when the documentation links the diabetes and eye disease clearly.
Clinical signs
Clinical features vary; refer to documentation. Moderate nonproliferative diabetic retinopathy is typically described by retinal microvascular changes such as hemorrhages, microaneurysms, or cotton-wool spots, without evidence of macular edema.
When to use this code
Use this code when the record states diabetes due to an underlying condition and specifies moderate nonproliferative diabetic retinopathy without macular edema. The provider should document the causal relationship and the eye complication. If laterality is not separately specified, follow the coding guidelines for diabetic retinopathy.
Do not use for
Do not use it if the retinopathy type, severity, or presence of macular edema is different or not documented. Check documentation if the diabetes is not clearly due to an underlying condition.
Coding tip
Code the underlying condition first and verify that the eye complication is documented as diabetic and without macular edema.