The feds are on schedule to charge up to 10 more Long Island Rail Road retirees with scamming disability pensions as part of a massive, $1 billion scheme, a prosecutor revealed yesterday.

Manhattan federal prosecutor Danya Perry said the names of the alleged fraudsters will likely be added to a new indictment to be handed up the week of May 14.

In addition, a new count of wire fraud will probably be added to the charges against those already under indictment, she said.

Eleven people, including seven retirees and two doctors, were busted last year for allegedly ripping off the Railroad Retirement Board with bogus disability claims that allowed LIRR workers to retire as early as age 50 at nearly full salary.