Diabetes due to underlying condition w diabetic nephropathy

This code signifies kidney disease (nephropathy) that has developed as a complication of diabetes mellitus, where the diabetes itself is a secondary manifestation of another underlying condition. This is distinct from Type 1 or Type 2 diabetes, indicating a specific etiology for the diabetic state.

Apply this code when documentation clearly states diabetic nephropathy in a patient whose diabetes is explicitly attributed to an underlying cause, such as cystic fibrosis, pancreatectomy, or drug-induced diabetes. The medical record must specify both the underlying condition causing the diabetes and the presence of kidney involvement.

• Always sequence the underlying condition first, followed by this code.
• Ensure documentation specifies the type of underlying condition causing the diabetes, not just "secondary diabetes."
• Do not use for Type 1 or Type 2 diabetes with nephropathy; those have their own specific codes.