Investigators say the woman walked into the New York Premier Cardiology office on Northern Boulevard in Flushing on July 14.
She took $140,000 worth of medical equipment before fleeing in a white SUV.
Police describe the suspect as light complexion, last seen wearing a baseball cap and sunglasses.
Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS or for Spanish 1-888-57-PISTA (74782)