Diabetes due to underlying condition w hyperglycemia

This code signifies hyperglycemia in a patient whose diabetes is directly caused by another underlying medical condition or external factor, rather than being primary type 1 or type 2 diabetes. Examples of underlying conditions include cystic fibrosis, pancreatitis, or iatrogenic causes like steroid-induced diabetes. The hyperglycemia is a direct manifestation of this secondary diabetes.

Apply this code when documentation clearly states diabetes mellitus due to an underlying condition, and specifically mentions hyperglycemia as a current clinical finding. This is appropriate for conditions like post-pancreatectomy diabetes with elevated blood glucose, or diabetes secondary to hemochromatosis. Ensure the physician explicitly links the diabetes to the underlying cause.

• Always sequence the underlying condition first, followed by this code.
• Do not use this code for type 1 or type 2 diabetes, even if comorbidities exist.
• Requires documentation of both the underlying condition and the hyperglycemia.