ICD-10 Code E10.31 – Type 1 diabetes mellitus with unspecified diabetic retinopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.31 – Type 1 diabetes mellitus with unspecified diabetic retinopathy
What it is
This code identifies type 1 diabetes mellitus with diabetic retinopathy when the eye complication is documented but not further specified. Use it when the record confirms retinopathy linked to type 1 diabetes, without more detail.
Clinical signs
Clinical features vary; refer to documentation. Retinopathy may be noted on eye exam, retinal imaging, or ophthalmology assessment, with diabetic changes affecting the retina but without a stated severity or subtype.
When to use this code
Use this code when the provider documents type 1 diabetes and diabetic retinopathy, but does not specify proliferative, nonproliferative, or macular edema details. It also fits when the chart says “diabetic retinopathy” only. If documentation names a more specific retinopathy type, code that instead.
Do not use for
Do not use this code for type 2 diabetes or for retinopathy not linked to diabetes. Also avoid it when the record specifies a different diabetic eye complication or a more detailed retinopathy code.
Coding tip
Check the ophthalmology note for retinopathy type and laterality before defaulting to an unspecified code.