Originally Posted by Flyhayes

I doubt the FAA will accept the hours you provided on your medical application as gospel. However, they will accept whatever you submitted on your last 8710 form since it was verified and signed off by a flight instructor.

Technically, all you need to do to get back in the saddle again is a flight review (along with the medical). Though, with a 15 year absence, expect it to be a lengthy one.