The 8 minute rule is a medical billing guideline used to determine how many billable units healthcare providers can report for timed therapy services, particularly for services billed under certain procedure codes. The rule applies to treatments provided in increments of at least eight minutes, meaning a provider must deliver a minimum of eight minutes of a timed service before one bi... https://revantagebilling.com/understanding-the-8-minute-rule-in-medical-billing/