ICD-10 Code E08.359 – Diabetes mellitus due to underlying condition with proliferative diabetic retinopathy without macular edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.359 – Diabetes mellitus due to underlying condition with proliferative diabetic retinopathy without macular edema
What it is
This code identifies diabetes caused by another underlying condition, with proliferative diabetic retinopathy affecting the retina but not involving macular edema. Use it when the record links the diabetes and eye disease to the documented underlying cause.
Clinical signs
Proliferative diabetic retinopathy reflects abnormal retinal blood vessel growth and may be associated with retinal hemorrhage, traction, or vision changes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents diabetes due to an underlying condition and specifically states proliferative diabetic retinopathy without macular edema. It applies when the retinopathy is part of the current diagnosis and macular edema is not documented. Check documentation if the underlying condition or eye findings are unclear.
Do not use for
Do not use this code if the record describes diabetic retinopathy without proliferative changes, or if macular edema is present. Do not assign it when the diabetes is not documented as due to another underlying condition.
Coding tip
Verify both the underlying cause and the absence of macular edema before assigning E08.359.