Drug/chem diabetes mellitus w ketoacidosis w/o coma

This code signifies diabetes mellitus that has developed as a direct result of drug or chemical exposure, complicated by ketoacidosis, but without the patient experiencing a comatose state. It indicates a severe metabolic derangement characterized by hyperglycemia, ketonemia, and metabolic acidosis, induced by an exogenous substance.

Apply this code when documentation clearly links the onset of diabetes to a specific drug (e.g., corticosteroids, certain antipsychotics) or chemical, and the patient presents with symptoms and lab findings consistent with diabetic ketoacidosis (DKA) without loss of consciousness. Supporting documentation should include a history of drug/chemical exposure, elevated blood glucose, positive ketones, and arterial blood gas results indicating acidosis.

• Always identify the specific drug or chemical causing the diabetes using an external cause code (T36-T65) in conjunction with this code.
• Distinguish from Type 1 or Type 2 diabetes with DKA; the etiology must be drug/chemical induced.
• Ensure documentation explicitly states "without coma" to avoid miscoding with E09.11.