It may be determined that it is medically necessary for a professional provider to repeat a procedure or service that was initially performed by a different professional provider. When a procedure or service is repeated by another professional provider within 24-hours of the initial encounter, Modifier 77 is used to report the repeated procedure or service. The circumstances requiring that a procedure or service be repeated can include (but are not limited to); a change in a individual's physical status, services repeated for comparative purposes, follow-up after treatment or intervention, to incur a better result, etc.
Modifier 77 describes a repeated procedure or service by a professional provider other than the provider who initially performed the service. This modifier should be utilized by the professional provider to indicate that the claim submitted is not duplicative.