The American Psychological Association, the largest association of psychologists worldwide, states the following:
"Therefore be it resolved that APA opposes all public and private discrimination on the basis of actual or perceived gender identity and expression and urges the repeal of discriminatory laws and policies; ...
Therefore be it further resolved that APA calls upon psychologists in their professional roles to provide appropriate, nondiscriminatory treatment to transgender and gender variant individuals and encourages psychologists to take a leadership role in working against discrimination towards transgender and gender variant individuals; ...
Therefore be it further resolved that APA supports the provision of adequate and necessary mental and medical health care treatment for transgender and gender variant individuals;
Therefore be it further resolved that APA recognizes the efficacy, benefit and medical necessity of gender transition treatments for appropriately evaluated individuals and calls upon public and private insurers to cover these medically necessary treatments;
Therefore be it further resolved that APA supports access to appropriate treatment in institutional settings for people of all gender identities and expressions; including access to appropriate health care services including gender transition therapies; ..."
Anton, Barry S. (2009). Proceedings of the American Psychological Association for the legislative year 2008: Minutes of the annual meeting of the Council of Representatives, February 22-24, 2008, Washington, DC, and August 13 and 17, 2008, Boston, MA, and minutes of the February, June, August, and December 2008 meetings of the Board of Directors. American Psychologist 64, 372-453. doi:10.1037/a0015932