The City of New York, often called New York City or simply New York, is the most populous city in the United States.

With an estimated 2015 population of 8,550,405 distributed over a land area of about, New York City is also the most densely populated major city in the United States.

Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, one of the most populous urban agglomerations in the world.

A global power city, New York City exerts a significant impact upon commerce, finance, media, art, fashion, research, technology, education, and entertainment, its fast pace defining the term .

Home to the headquarters of the United Nations, New York is an important center for international diplomacy and has been described as the cultural and financial capital of the world.

A physician, medical practitioner, medical doctor, or simply doctor is a professional who practises medicine, which is concerned with promoting, maintaining, or restoring health through the study, diagnosis, and treatment of disease, injury, and other physical and mental impairments.

Physicians may focus their practice on certain disease categories, types of patients and methods of treatment—known as specialities—or they may assume responsibility for the provision of continuing and comprehensive medical care to individuals, families, and communities—known as general practice.

Medical practice properly requires both a detailed knowledge of the academic disciplines (such as anatomy and physiology) underlying diseases and their treatment—the science of medicine—and also a decent competence in its applied practice—the art or craft of medicine.

Nursing is a profession within the health care sector focused on the care of individuals, families, and communities so they may attain, maintain, or recover optimal health and quality of life.

Nurses may be differentiated from other health care providers by their approach to patient care, training, and scope of practice.

Nurses practice in many specialisms with differing levels of prescriber authority.

Many nurses provide care within the ordering scope of physicians, and this traditional role has shaped the public image of nurses as care providers.

However, nurses are permitted by most jurisdictions to practice independently in a variety of settings depending on training level.

In the postwar period, nurse education has undergone a process of diversification towards advanced and specialized credentials, and many of the traditional regulations and provider roles are changing.

A patient is any recipient of health care services.

The patient is most often ill or injured and in need of treatment by a advanced practice registered nurse, physiotherapist, physician, physician assistant, psychologist, podiatrist, veterinarian, or other health care provider.

A dentist, also known in the U.S. as a dental surgeon, is a surgeon who specializes in dentistry—the diagnosis, prevention, and treatment of diseases and conditions of the oral cavity.

The dentist's supporting team aids in providing oral health services.

The dental team includes dental assistants, dental hygienists, dental technicians, and in some states, dental therapists.