A wide variety of health care providers use hormonal treatment for gender realignment. Primary care providers, endocrinologists, and reproductive health specialists (for instance, some Planned Parenthood offices) provide this service. If you have a local LGBTQ center or Planned Parenthood office, contact them for information about the closest alternatives in your area.
When Jewish laws where made, there was no such thing as "Gender Reassignment surgery". Successfully completing that surgery without the medical technology of today is impossible. There is a strong belief that harming one's own body is wrong, so one can argue that a surgery of that kind, which is very painful and causes great physical harm, is bad to do.
A GP should do.
dentist, eye doctor, podiatrist, pyschologist.
it depends on what kind of gender it is, boy or girl, and what they are into and what they like to do and wear.
You should see a dermatologist
It depends. If you want to be a physician (a medical doctor), you should get into medicine. If you want to be a philosopher (a PhD), you should get into liberal arts.
Anyone with two hearts and a TARDIS
A cardiologist.
An Orthopedist or Orthopedic Surgeon.
orthopedic specialist.
That what has been prescribed by your doctor only.
Immunologist.