Oth diabetes mellitus with hyperosmolarity with coma

This code signifies a form of diabetes mellitus, other than type 1 or type 2, that is complicated by a hyperosmolar state and a loss of consciousness. The hyperosmolarity indicates extremely high blood glucose levels leading to severe dehydration and electrolyte imbalances, culminating in a comatose state. This is a life-threatening metabolic emergency.

Apply this code when documentation clearly indicates a diagnosis of "other specified diabetes mellitus" (e.g., secondary diabetes due to pancreatitis or drug-induced diabetes) alongside hyperosmolar coma. The patient's medical record should explicitly state the presence of coma and laboratory findings consistent with severe hyperglycemia and hyperosmolarity.

• Ensure the type of diabetes is specified as "other specified" and not type 1 or type 2, as those have different codes for hyperosmolar coma.
• Verify documentation explicitly states "coma" in addition to hyperosmolarity; otherwise, a different code for hyperosmolarity without coma would be more appropriate.
• Sequence this code as the principal diagnosis if it is the primary reason for the encounter, followed by codes for any underlying cause of the "other specified diabetes mellitus" if known.