E13.00

HCC Category Mapping

What This Code Means

A secondary form of diabetes with dangerously high blood sugar and blood thickness, but without a life-threatening coma.

Coding Tips

• •E13 is used for diabetes caused by other specific conditions (pancreatitis, cystic fibrosis, hemochromatosis, etc.); document the underlying cause
• •The fifth character distinguishes between with and without coma; verify coma status in documentation

Clinical Significance

E13.00 identifies other specified diabetes mellitus (secondary diabetes) presenting with hyperosmolarity but without progression to nonketotic hyperglycemic-hyperosmolar coma. Hyperosmolar hyperglycemic state is a life-threatening emergency characterized by extreme hyperglycemia, dehydration, and high serum osmolality, typically seen in patients with residual insulin secretion.

Documentation Requirements

• ✓Documentation must identify the diabetes as secondary (due to a known underlying cause such as pancreatitis, cystic fibrosis, or drug-induced) and confirm the presence of hyperosmolarity.
• ✓Lab values including serum glucose, osmolality, and absence of significant ketosis should support the diagnosis.
• ✓Coma status must be explicitly addressed.

Commonly Confused Codes