Seems like the 3 places who will have a record of this are the police, the hospital and your insurance company. There may be consequences if you contact the police, since it cost them a lot to send 6 officers to your home. They might not be happy to have been tricked into that. I would ignore this one personally...although I'd be curious to read the police report!
The hospital - you might want your case file updated just for accuracy since you may be back at some point. Maybe ask your "friend" to send a letter and have it added to your file for future reference.
As far as the insurance - if you ever need to apply for private insurance, this would be a reason to turn you down. But if your psych history is already "florrid" - well, that's not an issue.
S