On Tuesday (Wednesday NZT), the woman left outside the University of Maryland Medical Center Midtown Campus, in Baltimore, could barely walk and seemed unable to speak.
At the doorway, Baraka asked for a supervisor, demanding to know why they were leaving her outside.
At a news conference on Thursday afternoon (Friday NZT), the hospital's chief pledged to investigate what he described as "a failure of basic compassion and empathy".
"I share the community's shock and anger at what occurred," he said, although shock and anger haven't ended patient dumping in the past.
The suit, filed in Fairfax County Circuit Court, alleged that Donald Paul Ryberg came to Inova just after noon on January 29, 2015, a day when temperatures barely edged above freezing.