Modifier -58 describes a staged or related procedure or service by the same provider during the postoperative period. For outpatient hospitals, the postoperative period is defined as the same service date.
CMS' Transmittal 3523, issued May 13, is the quarterly July 1 OPPS update. In this transmittal, CMS briefly mentions billing physical and occupational therapy and speech-language pathology services provided in support of or adjunctive to comprehensive APC (C-APC) services under revenue code 0940 (general therapeutic services) rather than the National Uniform Billing Committee‑defined revenue codes for these services (i.e., 042x, 043x, and 044x, respectively).
