Here's a guide to those who care for kids in the hospital:

Medical student: Medical students usually spend the first 2 years of medical school in the classroom and the last 2 years seeing patients in a hospital setting.

Resident: A resident is a doctor who has graduated medical school and is now training in a specific field. Doctors spend from 3 to 7 years in residency training before receiving board certification in their specialty. Residents providing care are supervised by attending physicians who must approve their decisions.

Fellow: A fellow has completed medical school and residency training, and is getting additional clinical training in a specialty.

Attending physician: An attending physician has completed medical training and has primary responsibility for the care of the patient. While overseeing care, the attending may supervise a team of medical students, residents, and fellows.

Specialist: A specialist is an attending physician who focuses on a particular area of medicine, such as cardiology (heart and vascular system) or rheumatology (problems involving the joints, such as arthritis).

Hospitalist: Hospitalists are doctors who usually specialize in internal medicine, family practice, or pediatrics. A hospitalist caring for your child will be in contact with your family doctor but will manage treatment while your child is hospitalized. Hospitalists don't have private practices, so their time is devoted to caring for hospitalized patients.

Physician assistant (PA): A physician assistant, under the supervision of a trained doctor, examines patients, diagnoses and treats simple illnesses, orders tests and interprets results, provides preventative health care counseling, assists in surgery, and writes prescriptions. Most PAs have a college degree and have completed a 2- to 3-year training program.

Doctor on-call: The "doctor on-call" is a physician working on weekends, evenings, and other shifts to answer questions or cover emergencies.

Anesthesiologist: An anesthesiologist administers medicine during surgery to help patients relax and fall asleep. The anesthesiologist is present during an operation to watch over patients and make sure they have no pain. 

Endocrinologist: An endocrinologist is a doctor who specializes in diagnosing and treating diseases and conditions caused by hormone problems, such as diabetes and growth problems.

Cardiologist: A cardiologist is a doctor who specializes in diagnosing and treating heart or blood vessel problems.

Gastroenterologist: This type of doctor specializes in problems with digestion and diseases of the esophagus, stomach, liver, gallbladder, and intestines.

Hematologist: A hematologist is a doctor who specializes in blood disorders.

Neonatologist: A neonatologist is a pediatrician with specialty training in the care of premature and critically ill newborns.

Nephrologist: A nephrologist is a doctor who diagnoses and treats kidney problems.

Oncologist: An oncologist is a doctor who specializes in treating cancer.

Otolaryngologist: This doctor specializes in treating ear, nose, throat, head, and neck problems.

Psychiatrist: A psychiatrist is a medical doctor (MD) who specializes in treating emotional and behavioral problems through psychotherapy, prescribing medications, and performing some medical procedures.

Psychologist: A psychologist specializes in treating emotional and behavioral problems through psychological consultation, assessment, testing, and therapy. A psychologist is not a medical doctor, but has a doctoral degree (PhD or PsyD). Psychologists at hospitals often help prevent or treat the mental health, behavioral, and emotional problems that patients and families may experience when coping with medical diagnoses.

Pulmonologist: A pulmonologist is a doctor who concentrates on lung problems, such as asthma or cystic fibrosis.

Rheumatologist: A rheumatologist is a doctor who treats problems involving the joints, muscles, and bones, as well as auto-immune diseases. A rheumatologist treats conditions such as arthritis and lupus.

Surgeon: A surgeon is a doctor who can operate on patients if needed. A general surgeon does many different types of procedures, such as taking out an appendix or fixing a hernia. Specialized types of surgeons include neurosurgeons who operate on the brain and nervous system, urologists who operate on the urinary system, and orthopedists who operate on bones and joints.