My mom recently fell at a nursing home and died. The cause of death per the hospital was accidental due to blunt force.

You (or whomever is legal representative of your mother's estate) most likely has a wrongful death case, as long as death occured less than two years ago- that is the statute of limitations for wrongful death. The statute of limitations for negligence/personal injury is three years, so it's possible to start a case even if she died more than two years ago as long as it's less than three. The value of the case would depend on the particular circumstances of the case, and your mother's age at the time of her death. If you have not already done so, you must file a petition to be appointed executor (if there was a will) or administrator (if no will) of your mother's estate before filing a lawsuit. You cannot commence an action on behalf of a deceased individual unless you have been appointed executor or administrator.