An adolescent medicine specialist is a type of pediatrician. They specialize in teenagers, but a normal pediatrician also covers this age range. Basically you switch to an adolescent doctor when you feel you are too old to go to a pediatrician, but are still too young to go to an adult doctor.

Lawrence S. Neinstein has written:

'Issues in reproductive management' -- subject(s): Chronic Disease, Chronic diseases in pregnancy, Complications, Contraception, Etiology, Female Infertility, Infertility, Female, Pregnancy

'Adolescent health care' -- subject(s): Adolescent medicine, Handbooks, Handbooks, manuals, Adolescent Medicine

Jordan D. Metzl has written:

'Sports medicine in the pediatric office' -- subject(s): Sports Medicine, Methods, Adolescent, Child, Athletic Injuries, Pediatric sports medicine, Rehabilitation

ACGME-approved fellowships:

geriatrics

sports medicine

adolescent medicine

Other available fellowships:

faculty development

obstetrics

preventive medicine

research

rural medicine

plus other less common ones

all listed at: http://www.aafp.org/fellowships/

The pediatrician has spent their entire medical life on adolescent medicine. They are specialists in child care, child diseases and the like.