The document defines and distinguishes between three terms related to global services:
1) Global service refers to all components of a service represented by a CPT/HCPCS code, which can be divided into professional and technical components.
2) Global surgical package includes all pre, intra, and postoperative services included in a CPT/HCPCS surgical code.
3) Global period refers to the number of postoperative days included in payment for a global surgical package, which can be 0, 10, or 90 days depending on the procedure.