A 73-year-old family doctor who was already facing three counts of sexual assault involving three patients has been charged with seven more counts of sexual assault involving the same three patients, according a state grand jury indictment returned Tuesday.

The indictment charges Donald Nicol with four counts of first-degree sexual assault involving a 12-year-old girl; two counts of second-degree sexual assault involving a 21-year-old woman; and two counts of second-degree sexual assault and two counts of fourth-degree sexual assault involving a 19-year-old woman.

The two women are sisters.

"The defendant is a physician who subjected three of his patients to multiple acts of sexual contact and sexual penetration," Deputy Prosecutor Michael Sweetman told state Circuit Judge Richard Perkins on Tuesday.

Perkins confirmed bail at $750,000 and ordered the bond Nicol posted in Hono­lulu District Court last month transferred to state Circuit Court.

According to the indictment, the sexual assaults involving the 12-year-old girl happened between August 2011 and July 19, while the sexual assaults involving the two sisters happened between September 2011 and Sept. 13.

The grand jurors did not return charges for three other allegations of sexual assault the state presented them involving the sisters between October 2007 and March 2011, when they were between the ages of 12 and 15.

Nicol runs his practice in an office in Kaha­luu and another one in Niu Valley Shopping Center.

At his appearance in Hono­­lulu District Court last month, his lawyer Brook Hart said Nicol denies that he touched anyone improperly and that touching females for examination is part of Nicol’s job.