WOODBURY - A class-action lawsuit claims that members of an identity fraud ring are working within the North Shore-LIJ Hospital system, and that little has been done to protect patients from the theft of their information.

Lake Success attorney Bonita Zelman alleges that hundreds, if not thousands of former patients may have had their private information stolen. She says the hospital hasn't notified all of the patients who were targeted, and adds that there are no safeguards in place to prevent future identity theft.

Pauletta Schramm, of Manhasset, is among a dozen plaintiffs named in the suit. She says she spent four days at North Shore-LIJ in April 2011, and noticed something was wrong when she received credit card bills for purchases she didn't make. A total of $5,000 worth of goods were purchased from stores including Bloomingdale's.

Two people have already been arrested in connection with theft of North Shore patients' identities, but the suit alleges that there are others connected to the fraud ring who still work at the hospital.

North Shore-LIJ spokesman Terry Lynam says he can't comment on the criminal investigation, but says that the hospital has already notified 200 patients of possible identity theft and has changed security procedures surrounding patient information. Lynam says that over the past 11 months, there have been no more reports of patients having their identities stolen.

The Nassau County District Attorney's Office declined to comment on the investigation and the civil suit.