Work Comp and No-Fault Auto treat the expiration date of a prescription differently. You need to understand the difference to make sure you get paid for all your sessions.

Work Comp

Is very strict on the expiration date. You must not treat before or after the valid date range of the prescription.

No Fault Auto

The start date is the date the prescription was signed (unless indicated otherwise.)

If treatment begins some number of days past the start date, it can continue that same number of days (with a maximum of 7) past the end date.

Except for extenuating circumstances, the responsibility to ask for an extension falls to the patient. Normally this energy is better spent on trying to get a new prescription rather than trying to get an extension.