Pediatric Allergist/Asthma/Immunologist - treat and manage patients with environmental, food and medication allergies, asthma, and immune system problems (immune deficiencies such as HIV, agammaglobulinemia).  Most treat patients in an office setting. 

Pediatric Anesthesiologist - help manage infants and children having surgery.  These highly skilled doctors provide airway and circulatory support during and after surgery.  They also help manage pain for many children with chronic illnesses.  They work within a hospital setting in the operating room and ICU of major hospitals and children's hospitals. 

Pediatric Cardiologist - treat heart and circulation issues of children.  Often they treat patients in a  hospital setting and see some patients in an outpatient, office setting.  Most are affiliated with a large university teaching hospital.  They perform echocardiograms (ultrasounds of the heart), cardiac catheterizations, and use medications to treat heart problems of children.  They work closely with Pediatric Cardio thoracic Surgeons who do the surgical repairs of pediatric heart patients.   

Pediatric Cardio thoracic Surgeon - primarily and initially trained as surgeons (not pediatricians), "CT Surgeons" are highly trained specialists that perform quite complex heart surgeries on infants and children of all ages.  They almost exclusively work at larger, tertiary academic medical centers. 

Pediatric Dermatologist - diagnose and treat skin and skin structure issues of children and infants.  They are typically working only at tertiary, academic medical centers. 

Pediatric Developmentalist - treat infants and children with developmental disabilities as well as diagnose various medical issues that affect development (such as ADHD, muscular dystrophy). 

Pediatric Emergency Physician - work in emergency rooms across the country in providing urgent and emergency care for infants and children.  They typically work at larger hospitals that can support a dedicated emergency room for children. 

Pediatric Endocrinologist - diagnose and treat "gland issues" of children, including obesity, thyroid disorders, diabetes, congenital or inborn errors of metabolism. 

Pediatric Gastroenterologist - treat and perform procedures on infants and children pertaining to the gastrointestinal (GI) system.  They often do procedures such as endoscopies and colonoscopies when children need these special procedures. 

Pediatric Hematologist/Oncologist - diagnose and treat infants and children with minor and major blood disorders, including leukemias and lymphomas.  They also treat solid tumors (cancers) in children of all ages. They are typically associated with larger academic or children's hospitals. 

Pediatric Hospitalist - specialize in treating only the hospital needs of infants and children admitted to the hospital due to illness.  They spend all of their time in the hospital (vs. in an office setting) treating their patients.  

Pediatric - highly trained pediatricians that are experts in treating critically ill infants and children.  They perform procedures in the ICU, spend almost all their time and energy in the ICU caring for the sickest of children. 

Pediatric Nephrologist - medical kidney specialists for infants and children. They often manage patients with high blood pressure (which is often kidney-related), are involved in kidney transplant management, and treat children that require dialysis.  

Pediatrician/Neonatologist - pediatricians that spend nearly all of their time in the Neonatal Intensive Care Unit treating and managing challenging sick newborns.  They treat premature infants and work closely with NICU nurses and respiratory techs in treating the sickest of newborns. 

Pediatric Neurologist - treat and manage infants and children with seizures, brain abnormalities and medical conditions that affect the brain.  

Pediatric Neurosurgeon - primarily trained as surgeons, these specialists do extra training after their surgery residency to treat infants and children with brain trauma, brain tumors and other surgical issues related the head. 

Pediatric Orthopedist - primarily trained as surgeons, they treat bone abnormalities, injuries and diseases that affect the musculoskeletal system (bones, joints, and muscles). 

Pediatric Psychiatrist - children and adolescent specialists that treat depression, anxiety, OCD, bipolar disorder and other psychiatric conditions. 

Pediatric Pulmonologist - treat and manage lung issues and manage severe breathing problems for children in the hospital.  They perform some procedures (bronchoscopy) and treat asthma and cystic fibrosis, among other lung diseases in children. 

Pediatric Rehab Physician (Physiatrist) - treat and manage the health needs of children that are recovering from injuries, often severe.  

Pediatric Sports Medicine Specialist - pediatricians that train in treating sports related conditions including musculoskeletal injuries, help prevent such injuries, and treat medical conditions that affect athletes (such as exercise-induced asthma). 

Pediatric Surgeon - trained as surgeons with extra pediatric surgical training, these doctors perform various kinds of surgery on infants and children, including appendectomies, bowel resections, etc. 

Pediatric Urologist - surgeons that receive extra training in dealing with genital and urinary (including kidney) issues that require surgery in children and infants.