transmetatarsal amputation

“How do you code for a hospital consultation when the patient is in the postoperative global period from another surgeon? I was called to the local hospital to see a patient that was transferred for medical treatment for an unrelated condition. He had a transmetatarsal amputation (TMA) performed for apparent osteomyelitis at the other hospital by a different podiatric surgeon. I was consulted to evaluate the TMA site and make recommendations for management. How do I code the diagnosis and E/M for this post-operative consultation?”