Post-operative care

The global surgery package defined by CMS includes all routine pre-operative, intra-operative, and post-operative services directly related to the procedure. For major surgical procedures (90-day global period) and minor procedures (0- or 10-day global period), evaluation and management visits related to the surgery are included in the single surgical payment and cannot be billed again. If a complication arises that requires a return to the operating room or a distinctly separate clinical decision, additional reporting may be appropriate, but routine wound checks, cast or splint adjustments, and healing assessments during the global window are not separately billable.

When post-operative follow-up is transferred from the operating surgeon to another qualified provider, both parties must report the same procedure code on the same date of service: the surgeon appends modifier 54 (surgical care only) and the receiving provider appends modifier 55 (postoperative management only). CMS is explicit that the modifier-55 claim must share the date of the surgery, not the date the follow-up physician first sees the patient. Failing to align those dates is a leading cause of claim rejection in split-care scenarios.

For diagnosis coding, routine orthopedic follow-up after surgery is captured with ICD-10-CM Z47.89 (Encounter for other orthopedic aftercare). This Z code signals to the payer that the encounter is planned recovery care rather than active treatment of a new or worsening condition. One important exception: healing fracture follow-up is coded to the original fracture code with the seventh-character 'D' (subsequent encounter for routine healing), not Z47.89. Mixing these conventions—or pairing Z47.89 with active injury codes when it is not clinically warranted—triggers audits and denials.

Mis-coding post-operative visits is one of the top drivers of orthopedic claim denials and RAC audit findings. Billing a standard E/M visit during the global period without a valid modifier (24 for unrelated E/M, 78 for return to OR for complication, 79 for unrelated procedure) almost guarantees denial or recoupment. Conversely, failing to report modifier 24 when a post-operative visit genuinely addresses a new, unrelated problem means leaving legitimate reimbursement on the table. For split-care situations, a single wrong date of service on the modifier-55 claim can void the entire post-operative management payment. Getting these rules right protects both revenue cycle integrity and compliance standing.