If you like, you can sue the hospital and any or all of the people you say assaulted you. The Texas constitution guarantees all citizens free access to our courts. This means that anyone can sue anyone, at any time, anywhere, for any reason, for any amount of money and without first proving anything to anyone. However, filing a lawsuit and winning one are two entirely different things. Winning a lawsuit and actually recovering some money are also two entirely different things.
If you are referring to criminal charges, you cannot charge anyone yourself. Only law enforcement officials, such as policemen and district attorneys' offices, are permitted to file criminal charges. However, any citizen is privileged to report perceived criminal conduct to law enforcement officials so that they may file criminal charges where such is indicated by the facts and applicable law.
Without knowing a lot more about the facts, I cannot say whether or not either you have a potentially valid claim for money damages, or anyone has violated any criminal law here. For example, were you a minor when you were hospitalized? Had you been adjudicated NCM? Were you hospitalized involuntarily under a court order? If you will answer these questions and provide more information, I will be glad to take another stab at your query.
If all of this occurred in another state, you will likely have to sue the hospital in that state.
If you attempt to sue the hospital here, upon the hospital's plea to the jurisdiction, the Texas court will likely find that it does not have personal jurisdiction over the hospital.
This answer is for informational purposes only and does not create an attorney-client relationship.