ICD-10 Code E11.11 – Type 2 diabetes mellitus with ketoacidosis with coma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E11.11 – Type 2 diabetes mellitus with ketoacidosis with coma
What it is
E11.11 identifies type 2 diabetes mellitus complicated by diabetic ketoacidosis and coma. Use it when the record links the coma to the ketoacidosis in a patient with type 2 diabetes.
Clinical signs
Typical documentation includes altered mental status or unresponsiveness with diabetic ketoacidosis in a person with type 2 diabetes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents type 2 diabetes with ketoacidosis and coma, or clearly states diabetic coma due to ketoacidosis. It applies when the coma is part of the acute diabetic emergency, not a separate neurologic diagnosis.
Do not use for
Do not use it for type 2 diabetes with ketoacidosis without coma, or for coma from another cause. Check documentation if the record does not clearly connect the coma to the ketoacidosis.
Coding tip
Verify that both ketoacidosis and coma are documented together before assigning E11.11.
2026 ICD-10-CM Diagnosis Code E11.11 – Type 2 diabetes mellitus with ketoacidosis with coma
What it is
E11.11 identifies type 2 diabetes mellitus complicated by diabetic ketoacidosis and coma. Use it when the record links the coma to the ketoacidosis in a patient with type 2 diabetes.
Clinical signs
Typical documentation includes altered mental status or unresponsiveness with diabetic ketoacidosis in a person with type 2 diabetes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents type 2 diabetes with ketoacidosis and coma, or clearly states diabetic coma due to ketoacidosis. It applies when the coma is part of the acute diabetic emergency, not a separate neurologic diagnosis.
Do not use for
Do not use it for type 2 diabetes with ketoacidosis without coma, or for coma from another cause. Check documentation if the record does not clearly connect the coma to the ketoacidosis.
Coding tip
Verify that both ketoacidosis and coma are documented together before assigning E11.11.