A teenager in South Florida who was advertising his health care services had certifications in holistic healthcare. He had lab coats and a stethoscope. He even had a medical office.

What the 18-year-old Malachi A. Love-Robinson didn’t have, officials say, is a medical degree.

On Tuesday, Mr. Love-Robinson was accused of practicing medicine without a license after officials said he was caught performing a physical exam and offering medical advice to an undercover agent. The episode is the latest in a series of encounters with law enforcement dating back to early 2015 as Mr. Love-Robinson tried time and again to portray himself as a doctor, officials said.

The Palm Beach County Sheriff’s Office said in a statement that Mr. Love-Robinson managed to open and operate his own office, called New Birth New Life Medical Center & Urgent Care, in a building populated by medical and dentistry offices in West Palm Beach, complete with a grand-opening celebration held in January.

In Florida, practicing medicine without a license is a third-degree felony. Mr. Love-Robinson was scheduled to appear in court on Wednesday.