ICD-10 Code E11 – Type 2 diabetes mellitus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E11 – Type 2 diabetes mellitus
What it is
E11 identifies type 2 diabetes mellitus, a chronic disorder of glucose metabolism caused by insulin resistance with relative insulin deficiency. Use it when the record documents type 2 diabetes without a more specific complication or subtype.
Clinical signs
Clinical features vary; refer to documentation. Common findings include persistent hyperglycemia, polyuria, polydipsia, fatigue, and sometimes no symptoms at all. Diagnosis is usually confirmed by the provider based on standard diabetes criteria.
When to use this code
Use E11 when the clinician documents type 2 diabetes mellitus and does not specify complications, control status, or another diabetes category. It also applies when the note states type 2 diabetes without further detail. If the record includes complications, you may need additional codes.
Do not use for
Do not use E11 for type 1 diabetes, gestational diabetes, or diabetes due to another underlying condition. Check documentation if the provider describes a different diabetes type or a secondary cause.
Coding tip
Review the note for complications and associated conditions before assigning E11 alone.