ICD-10-CM Codes for Diabetes Mellitus

Updated for 2025. Complete guide to coding Type 1, Type 2, and Secondary Diabetes with complications.

Common Diabetes Codes (Category E08-E13)

Diabetes coding in ICD-10-CM is distinctive because it frequently uses combination codes. These codes link the condition (diabetes) directly with its complications (e.g., neuropathy, nephropathy, retinopathy) in a single code.

Code Description
E10.9 Type 1 diabetes mellitus without complications
E11.9 Type 2 diabetes mellitus without complications
E11.21 Type 2 diabetes mellitus with diabetic nephropathy
E11.22 Type 2 diabetes mellitus with diabetic chronic kidney disease
E11.42 Type 2 diabetes mellitus with diabetic polyneuropathy
E11.51 Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene

Coding Tip

When coding for Diabetes with Chronic Kidney Disease (CKD), you generally need a minimum of two codes: the combination code E11.22 and a code from N18.1-N18.6 to specify the stage of CKD.

Frequently Asked Questions

What is the default code for Diabetes not specified?

If the type of diabetes is not documented, the default is E11.- (Type 2 diabetes mellitus).

Do I need a separate code for insulin use?

Yes. If a patient with Type 2 diabetes regularly uses insulin, add code Z79.4 (Long term (current) use of insulin).

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