A former hedge-fund portfolio manager accused of carrying out a record-setting insider trading scheme has been accused in New York of soliciting illegal inside information from more than 20 doctors.

A rewritten indictment unveiled yesterday against Mathew Martoma says he pursued illegal information from doctors from 2006 to 2008 while he worked at SAC Capital Advisors. He has pleaded not guilty to conspiracy and securities fraud and is free on bail.

Martoma, of Boca Raton, Fla., was arrested in November, accused of persuading a professor to leak secret data from an Alzheimer’s disease trial. Prosecutors say the information enabled other professionals at Steve Cohen’s hedge fund to earn a quarter-billion dollars illegally.