Gangrene of Toe

Patient presents with gangrene of the toe, likely due to critical limb ischemia or peripheral artery disease.  On examination, the affected toe exhibits signs of tissue necrosis, ranging from dry gangrene with mummification and black discoloration to wet gangrene with a foul odor, purulent drainage, and surrounding cellulitis.  Peripheral pulses are diminished or absent.  The patient reports symptoms including pain, numbness, paresthesia, and coldness in the affected toe and possibly extending into the foot.  Diagnostic evaluation may include arterial Doppler ultrasound, angiography, and laboratory tests such as complete blood count, basic metabolic panel, and blood cultures if infection is suspected.  Differential diagnoses include diabetic foot ulcer, frostbite, and other causes of tissue necrosis.  Treatment plan includes urgent vascular surgery consultation for possible debridement, revascularization procedures such as angioplasty or bypass grafting, and amputation if necessary.  Wound care management, pain control, and antibiotic therapy for infection are also indicated.  Patient education on foot care, diabetes management if applicable, and smoking cessation is crucial.  The prognosis depends on the severity of the gangrene, underlying vascular disease, and the presence of comorbidities.  Follow-up appointments will focus on wound healing, pain management, and monitoring for signs of infection or further tissue necrosis.  ICD-10 codes for gangrene of the toe may include I70.261, I70.262, I70.269 depending on laterality and further specification.  CPT codes for related procedures such as debridement, angiography, and amputation will be determined based on the specific interventions performed.