An addiction medicine specialist is a doctor who treats patients with addictions to substances like drugs and alcohol, or in some cases, behaviors like gambling. Many of these specialists also treat the diseases that stem from these addictions. These physicians are specially trained to prevent and treat the disease of addiction via psychiatric means, or other fields of medicine like family or internal medicine.

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.

A pediatric/adolescent psychiatrist is a doctor who specializes in diagnosing and treating mental and emotional conditions in young children and adolescents.These specialists study psychopathological disorders and their causes in order to prevent and identify them in their patients. These disorders may be caused by biological, psychosocial, genetic, demographic, or environmental factors, a patient's history, or any combination of these factors.Pediatric/adolescent psychiatrists treat patients through a variety of interventions including medical treatment, behavior therapy, cognitive-behavior therapy, problem solving techniques, family therapy, parent training, psychodynamic therapy, and consultation with the patient's primary care physician or school professionals.

A general dentist is your primary care dental provider. This dentist diagnoses, treats, and manages your overall oral health care needs, including gum care, root canals, fillings, crowns, veneers, bridges, and preventive education.

A geriatric specialist is a physician who treats the elderly population and the conditions that most commonly affect them. These doctors have special training in the effects of aging on the body and mind of a patient. Geriatric specialists treat common ailments faced by senior citizens, such as frailty, incontinence, memory problems, arthritis, senility, decreased functioning and more. In addition, geriatric specialists keep abreast of the different medications that an elderly person is prescribed to treat their more complex health issues in order to decrease adverse side effects and avoid dangerous drug interactions.

An internist is a physician who focuses on the diagnosis and treatment of conditions that affect the adult population—both acute and chronic.These doctors are often who adults see as their primary physicians because they treat a broad range of illnesses that do not require surgical or specialist interventions. They also work to help a patient maintain optimal health in order to prevent the onset of disease.In addition to treating the common cold and flu, internists also treat chronic diseases like diabetes and heart disease.

A neurologist is a physician who diagnoses and treats disorders of the nervous system which is comprised of the brain, spinal cord and nerves. These doctors do not perform surgery, but refer patients to neurological surgeons when they determine that surgical intervention is necessary. Some of the conditions that neurologists diagnose and treat are epilepsy, aneurysms, hydrocephalus, Parkinson's disease, multiple sclerosis, stroke, spinal disc herniation, and spinal disease. In addition to using diagnostic tests like MRI, CT scans, EEG and EMG, neurologists also employ neurological testing to gauge muscle strength and movement, balance, reflexes, sensation, memory, speech, and other cognitive abilities.

A psychiatrist is a doctor with specific training in the diagnosis and treatment of mental illness. He or she can not only provide the counseling necessary to both diagnose and treat a patient, but can also prescribe medication when needed. In some cases, a psychiatrist will only provide the medication and the counseling will be provided by another healthcare specialist, like a certified counselor or psychologist. Like other doctors, psychiatrists employ diagnostic tools like CT scans and MRI in order to observe the structure and function of a patient's brain. Once a diagnosis is made, these specialists may use behavior or cognitive therapy in order to address the patient's condition, or a multitude of other types of therapy, in conjunction with or in place of medication.