Texas Property Code - PROP § 55.002. Lien

(a) A hospital has a lien on a cause of action or claim of an individual who receives hospital services for injuries caused by an accident that is attributed to the negligence of another person.  For the lien to attach, the individual must be admitted to a hospital not later than 72 hours after the accident.

(b) The lien extends to both the admitting hospital and a hospital to which the individual is transferred for treatment of the same injury.

(c) An emergency medical services provider has a lien on a cause of action or claim of an individual who receives emergency medical services in a county with a population of 800,000 or less for injuries caused by an accident that is attributed to the negligence of another person.  For the lien to attach, the individual must receive the emergency medical services not later than 72 hours after the accident.