Diabetes due to underlying condition w ketoacidosis w coma

This code signifies a severe metabolic complication of diabetes, specifically ketoacidosis, which has progressed to a state of unconsciousness (coma). This diabetic state is not type 1 or type 2 diabetes, but rather diabetes resulting from another underlying medical condition or drug/chemical exposure.

Apply this code when documentation clearly indicates diabetes mellitus caused by an underlying condition (e.g., cystic fibrosis-related diabetes, postpancreatectomy diabetes) and the patient presents with both diabetic ketoacidosis and a comatose state. The physician's notes must specify the underlying condition responsible for the diabetes.

• Always sequence the underlying condition causing the diabetes first, followed by this code.
• Ensure documentation explicitly states "coma" in addition to ketoacidosis; otherwise, a different code for ketoacidosis without coma would be appropriate.
• Distinguish this from Type 1 or Type 2 diabetes with ketoacidosis and coma, which have different code assignments.