Los Angeles (www.myFOXla.com ) – An Arizona man is facing criminal charges for allegedly sexually assaulting two men while posing as a doctor running a West Los Angeles sperm bank, Los Angeles police and prosecutors said Friday.

Jeffrey Lynn Graybill, 40, also known as “Dr. Richardson,” was arrested in Arizona on Wednesday and brought to Los Angeles, according to the Los Angeles Police Department.

With no medical training, Graybill allegedly used Internet advertisements to solicit potential clients, offering them up to $4,000 monthly for sperm donations in support of “stem cell and other research,” according to an LAPD statement.

He allegedly did the same thing in Arizona, according to Jane Robison, a Los Angeles County district attorney’s spokeswoman.

In Los Angeles, she said, “He was allegedly pretending to be a doctor, operating a sperm clinic. He would pay for sperm donors and two males showed up to donate and he allegedly conducted exams and sexually fondled them.”

Police alleged that Graybill communicated with prospective victims by telephone or email before meeting with them to conduct physical examinations in Marina del Rey and Santa Monica.

Graybill did not have an actual physical clinic, according to authorities. One of the alleged victims named in the criminal complaint came to an apartment he was managing, and in the other case he allegedly went to the victim’s home, Robison said.

Graybill is charged with multiple counts of practicing medicine without a certificate, identity theft and sexual battery by fraud, Robison said. He is being held in lieu of $590,000 bail and is due back in court on Oct. 16, she said.