Even when solid administrative processes are in place, unusual things can happen. A provider may miss the deadline to submit information to the designated committee. During peak hiring and busy holiday schedules, department heads lose track of who is coming on board. In these cases, providers may be granted temporary privileges. But enrollments, which take 90 to 120 days, can’t happen until a physician is credentialed. And until a health plan awards the provider an effective date of participation, all claims generated by the provider must be written off or held.