A pediatrician is a doctor who specializes in the regular care of children, as well as the diagnosis and treatment of illness in children. Young patients are often more complicated to treat because they are still growing and developing.
While pediatricians may sub-specialize in specific therapy areas like oncology, surgery, ophthalmology, and anesthesiology, in general, pediatricians provide services like vaccinations, health exams, and treatment of common ailments and injuries. In addition, pediatricians are trained to handle the complex emotional and behavioral issues faced by children, especially during puberty.
Pediatricians normally see their patients from birth until the age of 18, although some may agree to treat patients into their early 20s, if requested.

Adolescent specialists are doctors who have advanced training in the health issues that adolescents face. These physicians deal with issues like the onset of puberty, reproductive health, eating disorders, irregular periods, mood changes, drugs and pressures from home and school. For girls entering adulthood, adolescent specialists can act as both pediatrician and gynecologist, so they only have to see one doctor for all their needs.

Legal medicine specialists advise on a variety of laws and regulations regarding health care and public health. This include disability claims, hospital law, privacy laws and physicians’ obligations and liabilities. They typically have a medical degree and a law degree so they're able to address specific legal issues that apply to medical professionals, hospitals and clinics.
Compared to forensic medicine, which deals with determining cause of death in criminal investigations, they deal with issues that impact patient care and they’re also typically involved in assessing illegal substance use in athletes.