LOS ANGELES — A 45-year-old biology teacher at the exclusive Brentwood School pleaded not guilty today to charges that she had sex with a 17-year-old male student.

Aimee Palmitessa — who was arrested last month and released Aug. 18 on $230,000 bond — faces up to 10 years and four months in prison if convicted of seven counts of unlawful sexual intercourse, two counts each of sodomy and sexual penetration by foreign object of a person under 18, and a single count of oral copulation of a person under 18.

Palmitessa, who was was placed on administrative leave following her arrest, is also facing a drug charge in Riverside County for allegedly possessing ecstasy at the Coachella Valley Music & Arts Festival in April.

According to prosecutors, the 17-year-old boy was once one of Palmitessa’s students at Brentwood School, an elite K-12 coed campus. She is accused of having sex with the teen on multiple occasions between June 12 and Aug. 11. She was arrested after the teen went to authorities, prosecutors said.

Palmitessa is due back in a Los Angeles courtroom Oct. 16, when a date is scheduled to be set for a hearing to determine if there is enough evidence to require her to stand trial.

The elite private school informed parents of Palmitessa’s arrest via its newsletter, in which Head of School Michael Riera wrote, “The Los Angeles Police Department informed us yesterday afternoon that Upper School teacher, Dr. Aimee Palmitessa, has been arrested on suspicion of inappropriate relations with a Brentwood School student and is expected to face charges … We immediately placed Dr. Palmitessa on administrative leave.

“As always, our primary concern is the safety, health and well-being of our students here at Brentwood School. To that end, we will do everything we can to cooperate with the official police investigation.”

Brentwood School, where annual tuition for seventh- through 12th-graders is $40,760, with an additional new-student fee of $2,000, book deposit of $600 and “retreat fees” of $400, counts among its students the children of Harrison Ford and Calista Flockhart, Reese Witherspoon and Ryan Philippe, and Arnold Schwarzenegger and Maria Shriver’s son Patrick Schwarzenegger.

Famous alumni of Brentwood School include actors Jonah Hill, Fred and Ben Savage, Maroon 5 frontman and “The Voice” coach Adam Levine, “Titanic” producer Jon Landau, entertainment and sports agency executive Casey Wasserman, NBC News reporter Katy Tur, soap opera actor Don Diamont, socialite and model Talita von Fürstenberg and Breitbart.com founder Andrew Breitbart.

Daily News Staff contributed to this report.

Correction: The alleged victim’s age in this story has been changed from 16 to 17, as the result of new information provided by the district attorney’s office.