Patient presents with gangrene of the left foot, manifesting as dry gangrene with clear demarcation.  On examination, the affected area exhibits mummification, desiccation, and a dark, black-brown discoloration of the toes extending to the midfoot.  Peripheral pulses in the left foot are absent, confirmed by Doppler ultrasound.  Patient reports a history of peripheral artery disease (PAD) and type 2 diabetes mellitus, both contributing factors to the development of critical limb ischemia.  Symptoms include cold sensation, numbness, and intermittent claudication in the affected limb, progressing to persistent rest pain prior to the onset of gangrene.  No signs of infection, such as purulent drainage, fever, or elevated white blood cell count are present.  Diagnosis of dry gangrene left foot is confirmed based on clinical presentation, vascular assessment, and patient history.  Treatment plan includes vascular surgery consultation for revascularization options, debridement of necrotic tissue, wound care management, and pain control.  Differential diagnoses considered included diabetic foot ulcer, peripheral neuropathy, and acute limb ischemia.  ICD-10 code I70.261, Gangrene, lower extremity, left foot, is assigned.  Patient education provided on wound care, diabetes management, and the importance of follow-up appointments.