Operating Room

“A Medicare patient is admitted to the hospital for a foot infection and suspected osteomyelitis of the left, fourth toe. Amputation of the toe is done at the metatarsophalangeal level and billed CPT 28820-T3. However, post-operative x-rays reveal that there is residual bone, presumably from the base of the proximal phalanx that remains. The patient is taken back to surgery a few days later for removal of the residual bone. This was done during the same hospitalization. Would this be coded as CPT 28124-78? Would the -78 modifier not apply since there is no global for the amputation? Could CPT 28124 be billed without a modifier?”