The Denver City Council has unanimously voted to ban "conversion therapy" for minors in the city.
The council voted Monday night on a proposal from Mayor Michael Hancock's administration.
In a statement, Hancock said, “This is a very proud moment for my administration, for members of City Council, and for everyone in Denver who values inclusion and acceptance."
The vote, Hancock added, shows "our city coming together and saying with one voice that we will never allow our LGBTQ+ youth to be the targets of these dubious practices, and that we are here to support them. Who they are is something to be celebrated, not maligned, and Denver will always be there to lift up our youth and ensure that they have the opportunity to grow up safe, happy and healthy."
The city defines conversion therapy as trying to change someone's sexual orientation or gender identity based on the idea that being LGBTQ is a mental illness.
The American Psychiatric Association and the U.S. Surgeon General's office have denounced conversion therapy. Research shows it can increase the risk of suicide, drug abuse and depression among teens, experts say.
The ban is aimed at state-licensed therapists. City officials have said they know of no therapists practicing conversion therapy in the city.
Denver becomes the first Colorado city to pass such a ban.
In the state legislatures, Democratic lawmakers who now control both statehouse chambers say they'll try to pass a statewide ban on the practice this session.
Watch a 9News video below on the conversion-therapy ban proposal.