It happened at about 1:30 Saturday afternoon in Flushing.
Police say the suspect followed the victim into her apartment building and then got on the elevator with her.
When she was entering her apartment, the suspect pushed her in and removed her pocketbook containing an unknown amount of money.
The suspect then fled the scene.
The woman was taken to Booth Memorial Hospital with a fractured bone in her leg.
The suspect is a white male, possibly Hispanic, 30-40 years old, wearing a yellow construction helmet, white surgical mask, dark jacket and carrying a tool bag.
Anyone with information is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS.
The public can also submit their tips by logging onto the Crime Stoppers Website at http://WWW.NYPDCRIMESTOPPERS.COM or texting their tips to 274637(CRIMES) then enter TIP577.