Dina Lohan told the Access Hollywood television show in an email that the 21-year-old would stay in the exclusive Utah facility where she has been undergoing treatment for drug and alcohol addiction.
"Not true," Lohan told Access Hollywood in an e-mailed response to reports that her daughter was leaving rehab soon, insisting she was "staying in Utah."
A source close to Lohan meanwhile told People magazine: "Lindsay is not leaving Cirque Lodge in Utah any time soon. She has a few more weeks to grow and develop, and she is doing great."
Lohan was checked into the facility in early August. It followed two separate incidents earlier this year where she was arrested for drink-driving.
Lohan, the star of "Herbie: Fully Loaded" and "Freaky Friday," was first arrested after smashing her Mercedes into a curb in Beverly Hills in May. A second arrest for drunk-driving followed in July.
She later received a one-day jail sentence for two counts of drunk driving, two counts of being under the influence of cocaine and one count of reckless driving.

Copyright AFP (Agence France-Presse), 2007