If the case was open in 2006 (mother died in 2007 because the hospitals negligence, should we pay now lien to Medicaid Medicare

Any liens should have been negotiated before the settlement was finalized, when there was leverage. If it is a Medicare lien, they do not have to reduce it at all and depending on the amount of the settlement and the lien you could be left with nothing. Did you have an attorney?

Consult with the lawyer that represented the estate.

A good lawyer would be doing this, so why didn't your lawyer do it is the question

Get your lazy lawyer to negotiate it down

Let the attorney who represented you finish his or her work. I assume your attorney got paid. It is your counsels job to complete the work he/she started, including dealing with the lien.