Nearly 1,500 patients who weren't registered with a GP attended A&E over the past 12 months.
The figure was given by Health Minister Claire Christian, in response to a question in Tynwald this week from Onchan MHK Julie Edge.
She said it's out of a total of 31,213 people who visited the emergency department at Noble's Hospital over the year.
Ms Christian also talked about trends in the numbers:
High ground could see 4 inches of snow on Saturday night
Mountain Road unlikely to open before Monday
Yellow warning for freezing temperatures tonight
School bangers night called off
AK47 and Uzi handed in to police
"No dispute" over Liverpool Ferry Terminal, says main contractor
More weekend bus strikes to come after 10-day walkout?
Minister to face question about bus strike