Members of the nation's largest doctor's advocacy group voted Tuesday to oppose the military's ban on open gay service, the AP reported.

American Medical Association (AMA) delegates meeting at the group's interim policy-making meeting in Houston agreed that the law, known as “don't ask, don't tell,” hinders open communication between gay men and lesbians and their doctors.

The law, enacted in 1993, prohibits gay service members from revealing their sexuality at the risk of losing their jobs. In October, President Obama promised gay leaders attending a Human Rights Campaign fundraiser he would repeal the ban.

“A law which makes people lie to their physicians is a bad law,” Dr. David Fassler, a University of Vermont psychiatry professor who attended the meeting, told the news service.

The AMA also declared that gay marriage bans have a detrimental effect on the health of gay families. The group concluded that such bans increase the cost of health insurance for gay couples, significantly increasing their risk of “living sicker and dying younger,” said Dr. Peter Carmel, an AMA board member.

During the summer, both the National Education Association (NEA) and the American Bar Association (ABA), two similar professional associations, adopted resolutions backing GLBT rights, including the right of gay and lesbian couples to marry.