Dr. Louis Aronne recognized that Errol Mair was having a stroke and drove him to the hospital.
The mayor said the results of an ongoing investigation could prompt changes to the 911 system.
All of the passengers suffered minor injuries in the crash on 51st Street and Fort Hamilton Parkway.
The hospital did not accept ambulances from Wednesday night to Thursday afternoon, officials said.
One person was seriously injured and 18 people were treated at the scene after a school bus crash.
SUNY Downstate stopped ambulances and patient admissions at Long Island College Hospital Wednesday night.
A car plowed into an ambulance on the corner of McGuinness Boulevard and Huron Street.
Ambulance services for basic healthcare needs were restored to Long Island College Hospital last week.
In the wake of Quinn's complaints, the number of reserve ambulances has been increased.
SUNY Downstate halted ambulance service and critical care at Long Island College Hospital.
The accident occurred just after 1 p.m. Thursday, leaving five people hurt, officials said.
Workers from EMS Station 7 helped save a Canadian man's life after a cardiac arrest in October.
The suspect restrained the volunteer paramedic and stole cash before fleeing in the vehicle, cops said.
The boy, 10, was rushed to a local hospital after the accident at Silver Lake Golf Course.
The woman did not sustain any injuries, but an EMT was hurt, the FDNY says.
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