Over-payment to nursing home.

It cannot go to the PNA account. It would put her over the income limit and effect her Medicaid. Yes, the PNA account will be part of her estate. As will any assets they were allowed. Her in NJ its 2k.

I think NJ has the LTC Medicaid non exempt asset max set at $2K and that would be whatever funds she has in a bank account (if she kept one open) plus whatever she has in the at the Nh PNA. So if this is accurate, I would not want any excess $ owned to you ever going into the PNA as it’s your $ not hers and if it were to go into the PNA it poses, imo, 2 very big bad issues:
1. a- takes her over the 2K asset max for LTC Medicaid. The NH do tend to monitor residents on LTC Medicaid as to their PNA balance because
1. b - if over 2K they should report it to Medicaid. And what a NH can do to avoid dealing with this is asap order an expensive piece of DME, like a wheelchair or walker, to get the PNA under the 2K max. Done by NH to keep them ok for Medicaid. But you will be most unhappy if this is done, just sayin’.
and
2. - $ in the PNA totally becomes moms ownership so any “transfer” to you looks like gifting which spirals into its own problems as gifting not allowed by Medicaid.

Fwiw a PNA balance statement should be sent out every 90 days from the NH to the POA and should pay a small amount of interest (it did for my mom in Tx as per State law and I’ve heard from others their States do the same).

You do want to do as others have suggested and send the NH a very detailed letter as to just how the NH were paid by you and that you personally are owed for the overpayment of two months. Send it as a certified letter with the return registered receipt from USPS.

if Nh is part of a chain, could take them 90 days to process the overpayment. Glacial.

You paid the NH out of YOUR funds?

I would send the business office of the NH documentation and ask when you can expect a check.

Do ALL of this in writing: CC your elder care attorney if you have one.

I hope one of the many that are well versed in Medicaid, Medicare will answer but my gut reaction is that you should send a certified letter with the documentation that you are owed a refund of 2 months.