“Revenge of the Nerds” star Robert Carradine died by suicide while hospitalized for mental healthcare, according to a medical examiner’s report detailing his final days.

The 71-year-old actor, best known as nerd-leader Lewis Skolnick, battled mental health issues including bipolar disorder, severe depression and anxiety prior to his Feb. 23 death, according to the Los Angeles Medical Examiner.

His daughter told the Los Angeles County Medical Examiner her father battle mental illness for 20 years and took medication. He’s said to have entertained recurring suicidal thoughts for roughly two decades before dying in a Los Angeles hospital.

Carradine, who also appeared in “Lizzie McGuire” and “Bonanza,” checked himself into a UCLA mental health facility where he’d previously been treated on Jan. 16.

An aide at the hospital discovered the Los Angeles native unresponsive and in cardiac arrest upon going to his room to tell him he had a phone call from his daughter a day later. Carradine had a leather belt around his neck.

He was revived, but died weeks later after being moved to an intensive care unit.

“The cause of death is attributed to sequelae of anoxic brain injury due to hanging,” the medical examiner’s office stated.

No suicide note was found.

His “Revenge of the Nerds” co-stars included embattled actor Timothy Busfield and Donald Gibb.

Gibb played a bully named Ogre who tormented Carradine and Busfield’s nerdy characters in the 1984 comedy and its sequels. He died in May after battling throat cancer, according to TMZ.

Busfield, who played geeky Arnold Poindexter, was indicted in February on four counts of sexual conduct with a child. He maintains his innocence.

Film critic Gene Siskel credited Carradine with making “Revenge of the Nerds” “special” in his 1984 review of the film.

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