Type 1 diabetes mellitus with ketoacidosis with coma

This code signifies a severe, acute complication of Type 1 diabetes where the body produces high levels of blood acids (ketones) due to insufficient insulin, leading to a state of unconsciousness. It represents a life-threatening metabolic emergency requiring immediate medical intervention.

Apply this code when documentation clearly indicates a patient with Type 1 diabetes presenting with diabetic ketoacidosis (DKA) who is also in a comatose state. This typically occurs in patients with poorly controlled Type 1 diabetes or during an acute illness. Supporting documentation would include laboratory findings confirming DKA (e.g., elevated ketones, metabolic acidosis) and a physician's assessment of coma.

• Always ensure documentation explicitly states "coma" in addition to ketoacidosis for Type 1 diabetes.
• Distinguish carefully from DKA without coma (E10.11) or hyperglycemic hyperosmolar state (HHS) with coma (E10.649).
• Sequence this code as the principal diagnosis when it is the primary reason for the encounter, followed by codes for any associated complications or underlying causes.