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Julia W. Mason vs. transgender people

Julia W. Mason is an American pediatrician active in the anti-transgender “gender critical” movement.

If you are the parent or guardian of a gender diverse young person, do not take your family member to Mason for care. If you are a minor being forced to see Mason by unsupportive adults, do what you can to end treatment with Mason and seek out supportive local resources instead.


Julia Robin Winter was born on March 19, 1966. Mason married Eliot C. Mason (born 1967).

Mason attended University of Illinois, earning a master’s degree and a medical degree in 1994. Mason did residency training in Pediatrics at Children’s Hospital Los Angeles from 1994 to 1997. Mason is licensed in Oregon, California, Minnesota, and Wisconsin. Mason is a board-certified pediatrician, a Fellow of the American Academy of Pediatrics, and currently practices at Calcagno Pediatrics in Gresham, Oregon.

Anti-transgender activism

Mason is involved with anti-trans organization Society for Evidence-Based Gender Medicine (SEGM). According to Mason, most gender diverse youth seen at Mason’s practice have “neurodevelopmental challenges or psychiatric comorbidities.”

AAP Resolution 33 (2021)

Introduced at the AAP Annual Leadership Forum 2021, this resolution “registered concern about the low quality of evidence underpinning treatment of minors with hormones and surgeries.”

AAP booth cancellation (2021)

SEGM tried to register a booth at the AAP conference in 2021, but it was rejected. Mason wrote the letter protesting the decision.

AAP Resolution 27 (2022)

Mason and four other pediatricians drafted Resolution 27 critical of AAP’s consensus on best practices for gender diverse youth. The authors are:

  • Julia W. Mason (Gresham, Oregon)
  • Sarah B. Palmer (Carmel, Indiana)
  • Paula Brinkley (Berkeley, California – Stanford Children’s)
  • Debra Hendrickson (Reno, Nevada – Northern Nevada Pediatrics)
  • Patrick K. Hunter (Milton, Florida – Pensacola Pediatrics)

AAP Resolution 37 (2023)

Mason again attempted to draft a resolution in 2023, which Mason claims is sponsored by 23 FAAP coauthors.

Wall Street Journal opinion and AAP response

Mason joined fellow anti-trans activist Leor Sapir in attacking mainstream pediatric organization American Academy of Pediatrics (AAP) for supporting gender affirming care for youth. In response, AAP President Moira Szilagyi stated:

Gender-affirming care can be lifesaving. It doesn’t push medical treatments or surgery; for the vast majority of children, it recommends the opposite.

This isn’t the story that is being told by anti-transgender activists. No European country has categorically banned gender-affirming care when medically appropriate. Contrary to what Dr. Mason and Mr. Sapir claim, the U.K. isn’t moving away from gender-affirming care. It is moving toward a more regional, multidisciplinary approach, similar to what is practiced in the U.S.

Mason frequently appears with other conservative and anti-trans activists, including:


Szilagyi, Moira (Aug. 21, 2022 ). Academy of Pediatrics Responds on Trans Treatment for Kids. Wall Street Journal

D’Ambrosio, Amanda (August 23, 2022). AAP Stands by Policy on Gender-Affirming Care for Trans Youth — Small group of pediatricians who called for evidence review charge they’re being sidelined. Medpage Today

O’Malley, Stella (August 23, 2022). At the American Academy of Pediatrics, ‘Affirmation’-Based Gender Dogma Is Finally Being Challenged. Quillette

Reinl, James (August 11, 2022). Leaked files expose how U.S. pediatricians accuse their own professional body of pushing a ‘harmful’ drugs-first approach on trans teens — and of deliberately BLOCKING moves to change the rules. Daily Mail

Buttons, Christina (July 9, 2023). The American Academy of Pediatrics sidelines formal proposal to revise Pediatric Medical Transition policy for the 4th consecutive year. buttonslives

Publications by Mason

Mason, JW (October 7, 2019). A physician is worried about gender transition in pediatrics. KevinMD

Pine, Elyse D.; Mason. Julia W. (April 28, 2021). Ban Hormones for Transgender Kids? Point-Counterpoint. Medscape

Mason, JW (August 3, 2021). [Letter to AAP protesting cancellation of SEGM booth]. SEGM

Mason JW + 4 anonymous authors (March 31, 2022). Resolution 27 (2022): In Support of a Rigorous Systematic Review of Evidence and Policy 3 Update for Management of Pediatric Gender Dysphoria.

Mason, Julia; Sapir, Leor (August 17, 2022). Opinion: The American Academy of Pediatrics’ Dubious Transgender Science. Wall Street Journal

Abbruzzese E, Levine SB, Mason JW (2023). The Myth of “Reliable Research” in Pediatric Gender Medicine: A critical evaluation of the Dutch Studies-and research that has followed. J Sex Marital Ther. 2023 Jan 2:1-27.

Levine SB, Abbruzzese E, Mason JW (2023). What Are We Doing to These Children? Response to Drescher, Clayton, and Balon Commentaries on Levine et al., 2022. J Sex Marital Ther. 2023;49(1):115-125.

Levine SB, Abbruzzese E, Mason JW (2022). Reconsidering Informed Consent for Trans-Identified Children, Adolescents, and Young Adults. J Sex Marital Ther. 2022;48(7):706-727.

Malone WJ, Hruz PW, Mason JW, Beck S (2021). Letter to the Editor from William J. Malone et al: “Proper Care of Transgender and Gender-diverse Persons in the Setting of Proposed Discrimination: A Policy Perspective.” The Journal of Clinical Endocrinology & Metabolism Volume 106, Issue 8, August 2021, Pages e3287–e3288


Dumont, Joey (December 19, 2022). “Should we medicalize children?” with Dr. Julia Mason. True Thirty

Boyce, Benjamin (October 3, 2022). Saving Child Medicine from Gender Ideology | with Julia Mason.

Kelly, Megyn (Aug 4, 2022). The Truth About Puberty Blockers for Young Children, with Dr. Julia Mason and Dr. Erica Anderson.


Calcagno Pediatrics (

Twitter (

Note: this profile originally misstated Mason’s birthday.