Malachi Love-Robinson, 18, was arrested after examining and providing medical advice to an undercover police officer.
He was released on bail on Wednesday.
Mr Love-Robinson has denied that he posed as a medical doctor and said he only used the title because he had obtained a PhD online.
"This was me simply trying to do something for the community in a light that I saw that was needed," he told WPTV, a West Palm Beach news channel.
"Honestly, if you ask me many people are getting tired of hearing that they have to take a script just to feel better."
The website of the New Birth New Life Medical Center describes him as a "well rounded professional".
In January 2015, at the age of 17, he was reportedly caught walking around a local hospital wearing a white coat and carrying a stethoscope.