PA Medicaid question- On Medicaid, off Medicaid, back on Medicaid?

Dad , in a Nursing Home, qualified for Medicaid in August.

We sold his house the following March. He now has too much money and will come off of Medicaid until he spends down this house money to the Medicaid level once again and then go back onto Medicaid.

Does PA start billing him "Private Pay" from the March sale of home? Or does it go back to August and collect those Medicaid covered months as private pay?