An employee of the clinic went public Tuesday with claims the actress was "out of control" and had alcohol on her breath during a tussle between them on Dec. 12.
Dawn Holland, a chemical technician at the desert rehab facility, gave her account in a video interview with TMZ.com, which included a copy of her report on the incident.
Within minutes of the story posting, Holland was fired.
"Regrettably," the Betty Ford Center said in a statement, "one of our employees violated strict confidentiality guidelines and laws by publically identifying patients in a media interview and by disclosing a privileged document."
The center didn't comment on Holland's allegations or a police investigation in which Lohan has been named a suspect for alleged misdemeanor battery.
Lohan Called 'Angry'According to Holland, Lohan and two other patients had "snuck out" and "went drinking," but were caught by another technician when they were "trying to jump over the back wall" to the clinic house in which they were living.
Holland was then called to administer Breathalyzer tests to the three patients when trouble erupted between her and a foul-mouthed Lohan, she says. "She was very angry and out of control," says Holland.
Police were called, and while Holland was on the phone with authorities, Lohan "grabbed my wrist and snatched it down" to try to wrest away the phone, sending Holland to the emergency room with a sprained right arm and hand, she says. Holland says she's now on worker's compensation leave.
Throughout the night, Lohan refused to submit to a Breathalyzer test and had apparently been drinking. "She had alcohol on her breath," says Holland, who denies being the aggressor. "I did not touch the woman," she says. "I am not willing to risk my job over any patient."
Lohan's attorney, Shawn Chapman Holley, said in a statement: "We are declining to comment on the underlying facts surrounding this incident, as we await the completion of the police investigation. It should be noted, however, that it was Ms. Lohan who called 911 to request police assistance at the time this incident occurred."
Lohan, who has just weeks left of her court-ordered stay at Betty Ford, is still under probation in a DUI case. A violation, including breaking the law, could send her back to jail.
Reporting by KEN LEE