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I am sorry to hear about this situation. Indeed, if she leaves the home for care, Medicaid can seek reimbursement from the value of the house for any amounts it's paid for nursing home care. This is true even if the home is willed to someone else in the Will.
Medicaid has a lookback period of 5 years.
One way to void this is to have her deed the home to someone else 60 months before he or she applies for Medicaid coverage of the nursing home care. Or, she can place it into an irrevocable trust, but that gets a little complicated - see HERE.
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