In a lawsuit, Lauren Pisciotta alleges the star sent her lewd texts and performed sex acts while on the phone with her, according to US media.
She claims she was fired in 2022, but that a $3 million (£2.4 million) severance package was never paid.
The BBC has contacted West’s lawyer for a response to her allegations, but has yet to receive a reply.
The lawsuit was first reported in the US by TMZ, and later confirmed by Rolling Stone, The Wrap and US Weekly, which says court papers were filed on Monday in the US.
I want to say he also tweeted something about it, and basically proved South Park’s stereotype correct
He had a line about it on his song Gorgeous