Thank you both for your responses, I am wondering if either of you might be able to provide an answer to a follow up question:
Assuming the providers are unable to collect the outstanding money from the participants, my understanding was then that only the affected participants would become HSA ineligible. However, the TPA has suggested that all participants in the HDHP, including those unaffected by the error, will become HSA ineligible since the HDHP is not longer a high deductible plan (because the HDHP made payments before the deductible was met for the select group of affected participants.) Put simply, the TPA believes that the HDHP early payments disqualifies all participants from HSA eligibility, not just the ones who had been paid before meeting their deductible. Is this approach consistent with anything either of you two have read?
Thank you!