Diab due to undrl cond w diabetic prph angiopath w gangrene

This code signifies diabetes that is a direct consequence of another underlying disease or condition, complicated by peripheral vascular disease affecting the extremities, which has progressed to tissue death (gangrene). This form of diabetes is not type 1 or type 2, but rather secondary to another medical problem.

Use this code when documentation clearly states diabetes is secondary to another condition (e.g., cystic fibrosis, pancreatitis, drug-induced) and the patient presents with both diabetic peripheral angiopathy and gangrene. The medical record must explicitly link the diabetes to the underlying condition and confirm the presence of both vascular compromise and tissue necrosis in the periphery.

• Always sequence the underlying condition causing the diabetes first, followed by this code.
• Ensure documentation specifies "gangrene" and not just an ulcer or infection, as this is a more severe manifestation.
• Distinguish from codes for type 1 or type 2 diabetes with complications; this code is specifically for secondary diabetes.