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I am sorry to hear about this situation. A lien is only possible if the creditor (in this case, the hospital), sues and then receives a judgment. If so, then the creditor can place a lien on titled property reflecting the judgment.
That normally does not take place unless/until months (or sometimes a year or more) of collection efforts have proved fruitless and the creditor decides to file suit. Ergo, if they have just sent this to collections, then someone in your situation normally has time before any legal action is taken.
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