A Specialist Physician is a medical doctor who has completed advanced training in a specific area of medicine, such as cardiology, neurology, or oncology. These physicians focus on diagnosing and treating complex health issues related to their specialty, often working with patients who have specific conditions that require expert care. Specialist physicians typically complete a residency program after medical school, followed by additional fellowship training in their chosen field. They often collaborate with primary care doctors to provide comprehensive care and may perform specialized procedures or surgeries related to their area of expertise.