ICD-10 Code E09.1 – Drug or chemical induced diabetes mellitus with ketoacidosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E09.1 – Drug or chemical induced diabetes mellitus with ketoacidosis
What it is
This code identifies diabetes caused by a drug or chemical, with ketoacidosis present. Use it when the diabetes and ketoacidosis are documented as due to an external substance rather than primary diabetes.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include hyperglycemia with ketones and metabolic acidosis, along with symptoms such as dehydration, abdominal pain, vomiting, or altered mental status.
When to use this code
Use E09.1 when the record clearly links diabetes and ketoacidosis to a medication, toxin, or other chemical exposure. You should code it when the provider states the diabetes is drug or chemical induced and the patient has ketoacidosis.
If the cause is not specified, check documentation before assigning this code. Also confirm whether the adverse effect, poisoning, or external cause needs separate coding according to the record.
Do not use for
Do not use this code for primary diabetes with ketoacidosis, such as type 1 or type 2 diabetes. Do not use it when ketoacidosis is absent or when documentation does not support a drug or chemical cause.
Coding tip
Always verify both elements: the induced diabetes and the ketoacidosis, and make sure the causative substance is documented.