The nursing home cannot force you to sign a statement of financial responsibility. Usually, they get family members to sign a statement stating they will be financially responsible. If that happens, they can likely go after you. However, if that does not occur, the debt is that of the patient herself and you would not be personally liable. As an aside, you should have obtained an elder law attorney to complete the medical assistance application process for you. You would have to pay some legal fees, however the fee can be paid out of the income/assets of the nursing home individual, which is money that would have to be paid to the nursing home anyway. Medical Assistance would have paid the coinsurance amount that was not paid by medicare. As the patient, your mother could possibly be found financially liable for unpaid bills.