Doogie Howser, he is not.

Police have arrested 18-year-old Malachi Love-Robinson, of West Palm Beach, Fla., for posing as a doctor by practicing medicine without a license.

Love-Robinson, who was first accused of being a doctor last January, came under further scrutiny after an investigation revealed he had opened his own office. During the course of the investigation, Love-Robinson performed a physical on an undercover agent and is also accused of selling vitamins to an 86-year-old woman he claimed had arthritis.

That woman wound up taking an ambulance to the hospital and gave her purse and keys to Love-Robinson to help her lock up her home. The woman has accused of Love-Robinson of forging checks from her account.

Love-Robinson had a website for his New Birth, New Life Alternative Medicine and Urgent Care Clinic, as well as a Facebook page (although it has since been taken down).

He also had a profile on -- since removed -- that said he was 25 years old and specialized in naturopathy, psychology and mental health.

Love-Robinson remains defiant, telling WPBF, "I'm hurt because of all of these allegations, but this is not the first time I have been accused and I will pursue this, and when I do, you will be the first to know."