Get paid for the physical and/or occupational therapy services you deliver. Proper coding and documentation are essential for appropriate reimbursement. In recent years, there have been major changes to?the way in which therapy services by assistants are reported. Much confusion remains on when modifiers must be assigned to procedures involving assistants.?And updates to the Medicare policies for therapy with new threshold limits and the annual “always therapy” listing that also requires the use of modifiers can potentially change annually.?