ICD-10 Code E09.329 – Drug or chemical induced diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E09.329 – Drug or chemical induced diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema
What it is
This code identifies diabetes caused by a drug or chemical, with mild nonproliferative diabetic retinopathy in the eye and no macular edema. Use it when the record links the diabetes and retinal finding to the same condition.
Clinical signs
Typical documentation includes diabetes attributed to a medication or chemical exposure plus mild nonproliferative diabetic retinopathy on eye exam. Clinical features vary; refer to documentation for the retinal findings and whether macular edema is absent.
When to use this code
Use E09.329 when the provider documents drug- or chemical-induced diabetes and specifically states mild nonproliferative diabetic retinopathy without macular edema. You should also use it when the eye condition is clearly tied to that secondary diabetes diagnosis.
If the record names the causative agent, code it separately when directed by your coding rules. Check documentation if the retinopathy severity or presence of macular edema is unclear.
Do not use for
Do not use this code for primary diabetes, unspecified diabetic retinopathy, or retinopathy with macular edema. Also avoid it when the chart does not confirm a drug or chemical cause.
Coding tip
Match the exact retinopathy severity and edema status in the ophthalmology note before assigning E09.329.