Type 1 diabetes w diabetic peripheral angiopathy w gangrene

This code signifies Type 1 diabetes complicated by compromised blood flow in the peripheral arteries, leading to tissue death (gangrene). This is a severe manifestation of diabetic microvascular and macrovascular disease, often affecting the extremities.

Apply this code when documentation clearly indicates a patient with Type 1 diabetes has developed gangrene due to diabetic peripheral angiopathy. This typically involves findings of non-healing ulcers, black necrotic tissue, and/or signs of severe ischemia in the limbs.

• Always sequence this code after the primary diagnosis of Type 1 diabetes (E10.-).
• Ensure documentation specifies "Type 1" diabetes; do not use for Type 2 diabetes with gangrene (E11.52).
• Look for explicit mention of "gangrene" and "diabetic peripheral angiopathy" or similar terms like "PVD due to diabetes" with gangrene.