Brad Reubendale told 9NEWS he underwent conversion therapy as an adult for over a decade. He testified before lawmakers in support of the ban for five years.

The Supreme Court on Monday agreed to take up a challenge to state and local laws that ban so-called "conversion therapy" for LGBTQ children. The dispute before the court arose out of a Colorado law that prohibits licensed mental health professionals from engaging in conversion therapy on children who may be questioning their sexual orientation or gender identity.