Can I Be Billed for Calling 911 to Help a Drunken Roommate Who Was Unresponsive?
The answer will depend in part on whether you signed any documents agreeing to be responsible. Typically, the patient transported or the legal guardian of the patient, if a minor, is ultimately responsible for all billed charges. It will be a matter of subjective determination for the court whether you can be required to indemnify the patient for the emergency services for making a false report or under notions of equity and fairness. Generally, the court will examine all the circumstances and decide how a "reasonable" person would act in a similar situation.
The court will likely not be sympathetic to the former roommate if you can prove the validity of your cause for alarm and don't have a history of repeated 911 calls.