Diabetes due to underlying condition w periodontal disease

This code signifies diabetes mellitus that is a direct consequence of another underlying medical condition, specifically when the patient also presents with periodontal disease. It indicates a secondary form of diabetes where the primary etiology is not type 1 or type 2 diabetes, but rather another disease process.

Apply this code when documentation clearly states diabetes is secondary to another condition (e.g., cystic fibrosis, pancreatic disease, hemochromatosis) and periodontal disease is also present. The physician's notes must explicitly link the diabetes to the underlying condition, and periodontal disease should be diagnosed.

• Always sequence the underlying condition first, followed by this diabetes code.
• Do not use this code for Type 1 or Type 2 diabetes with periodontal disease; use the appropriate E10 or E11 code with the periodontal complication.
• Ensure the documentation specifies "due to" or "secondary to" an underlying condition for the diabetes.