It says it may take "personnel action" as a result of the discharge.
The video, which was posted on Facebook, set off an avalanche of online fury and disbelief as people called out the hospital staff for their uncaring, heartless attitude toward patients.
The videos show the woman, who may have mental health issues, in a state of distress struggling to stand or speak.
The mother, who spoke to CBS News and identified herself only as Cheryl, said her daughter, Rebecca, is "not deaf, not a prostitute, not a drug addict", but suffers from bipolar disorder and Asperger's syndrome.
Tania Wise said she was in the emergency room at the same time as the woman and saw one interaction between the woman and a nurse that she called disturbing.
'When people are discharged, they¿re discharged, inner city hospitals have no money for taxis and social programs.
The mother of the patient says her daughter is 22-years-old and had been missing. He said he though at first that she was dead because of the way she fell out of her gown and wheelchair. It was the latest example of a practice known as "patient dumping" or "hospital dumping" in which hospital patients who are homeless, mentally ill or both are released to the streets.
"This incident is very visual because it happened on camera", Breidenstine said. "They knew I was taping and they didn't even look back".
Imamu Baraka stopped to help this woman after hospital security guards left her dumped at a bus stop.
"I just witnessed this with my own eyes", Baraka wrote in his post. "I had no choice but to give this young lady a voice in this moment".
Overnight, Imamu Baraka was walking past a Baltimore hospital when he noticed something he says he'll never forget.
Said Suntha, "We do not believe that what occurred Tuesday night in any way defines who we are as an organization". While there are many circumstances of this patient's case that we can not address publicly, in the end, we clearly failed to fulfill our mission with this patient.
Baraka could not be reached for comment.
He asked them: "Wait, so y'all going to just leave this lady out here with no clothes on?" Baraka asks the group. "Then I would have been there when they put her in a taxi and sent her to a homeless shelter". One of the security workers responds that he is the supervisor.
"She is getting the help she needs now", said Baraka. The man chose to approach the distressed woman in order to question her, but all that he could get from her was a low-pitch scream.
In his Facebook post where he posted the video, Baraka criticizes the hospital.
The video showed security guards leaving the disoriented woman from the University of Maryland Medical Center Midtown on the street, dressed in just the hospital gown and socks in the 30 degree weather. "You must do better".