Dr. Rachel Levine, the assistant secretary for health at the Department of Health and Human Services, made history Tuesday.
Dr Levine, appointed by President Joe Biden, is already the highest-ranking openly transgender official in the US.
She described the occasion as “momentous” and “historic” during a swearing-in speech on Tuesday.
“May this appointment today be the first of many more to come, as we create a diverse and more inclusive future,” she said in a speech that paid tribute to other LGBTQ individuals who came before her.