Reexamination is the process of performing selected tests and measures after the initial examination to evaluate progress and to modify or redirect interventions. The tests and measures may be repeated from the initial examination, or the PT may introduce new elements of tests and measures to evaluate the individual's status. Reexamination may be indicated more than once during a single episode of care and for a number of reasons. However, due to certain payer regulations, many therapists confuse a clinical reexamination with a billable reevaluation code. In general, a billable reexamination of a patient or client should occur whenever there is an unanticipated change in the individual's status, a failure to respond to physical therapist intervention as expected, the need for a new plan of care, or requirements based on state practice acts or other requirements.