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Chad Litz appeared in court Thursday. He previously served time for identity theft and was cited as a nurse imposter. He's in jail Thursday, accused of these same crimes again.
Litz was sentenced to four years in prison for identity theft in 2011. He was released in March of 2013.
In 2015, the California Board of Registered Nursing cited Litz for unlawful practice and being a nurse imposter.
Litz, 39, is not a licensed practitioner but was working as a nurse at the City Impact Clinic on Jones Street in San Francisco.
"Some of the abilities of a nurse practitioner would be to prescribe medicine, or do certain basic procedures," said Assistant District Attorney Alex Bastain.
The district attorney's office said Litz had been with the clinic for months, that he treated at least 28 patients and prescribed controlled substances to two of them. He's facing five felony counts, four for practicing medicine without a license and one for identity theft.
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Litz was arrested getting off of a cruise ship in Florida on March 10.
"We put a lot of trust in the medical profession and allegations such as this really shake the confidence and trust we put in the medical profession," Bastain told ABC7 News.
Litz also claimed to have worked at Opera Plaza Dentistry. His LinkedIn page lists extensive credentials including two master's degrees.
"Very surprising, very surprising," said Litz' neighbor William Mitchell.
Litz had been living in Daly city. Mitchell has been his neighbor for about a year.
"Would never guess just saying hi to him, good morning, goodbye," he said. "Stuff like that."
The district attorney's office is asking anyone who may have been treated by Litz to call authorities.