Medical Doctors: Roles, Terminology, and Professional Standards

A medical doctor—referred to as a physician in North American English and a medical practitioner in British English—is a specialized health professional dedicated to the practice of medicine. The core objective of medicine is to promote, maintain, or restore health through the systematic study, diagnosis, prognosis, and treatment of diseases, injuries, and various physical and mental conditions.

The profession is a blend of rigorous science and applied skill. Doctors must possess a deep understanding of medical sciences, including anatomy, physiology, and pathology, while demonstrating the competence to apply this knowledge in real-world clinical settings. This application is often described as the art or craft of the medical profession.

: The Doctor, an 1891 portrait by Luke Fildes[1]

Key Facts

• Scope: Doctors may work in general practice or specialize in specific disease categories and patient types.
• Terminology: The term "physician" has different meanings in North America (all medical doctors) versus the UK (specialists in internal medicine).
• Health Outcomes: Studies indicate that US male doctors have a slightly higher life expectancy than other highly educated professionals.
• Regulation: Most jurisdictions require government licensing to ensure public safety and manage subsidized healthcare spending.
• Education: Practitioners must hold a medical degree from a university to qualify for registration or licensure.

Terminology and Regional Differences

British and Commonwealth Usage

In the United Kingdom and Commonwealth nations, the term physician historically refers to a specialist in internal medicine, specifically those who treat patients using drugs rather than manual procedures. This distinguishes them from surgeons, who specialize in operative procedures.

This professional divide dates back centuries. By 1400, Middle English texts already noted the difference between a "cirugian" (surgeon) and a physician. This distinction was formalized in 1518 when Henry VIII granted a charter to the London Royal College of Physicians, followed by a separate charter for the Company of Barber-Surgeons in 1540.

: Francesco Redi, considered to be the founder of experimental biology, was the first to recognize and correctly describe details of many important parasites.[3]

North American Usage

In the United States and Canada, "physician" is a general term for any medical practitioner holding a professional medical degree. The American Medical Association (AMA) defines a physician as an individual possessing either a Doctor of Medicine (MD) or a Doctor of Osteopathic Medicine (DO) degree.

Within this framework, specific roles exist: internists specialize in internal medicine, while hospitalists are internists who work primarily or exclusively within hospital settings. Community-based providers are typically called primary care physicians or family doctors.

: Elizabeth Blackwell, the first female physician in the United States, graduated from SUNY Upstate.

Professional Roles and Specializations

Medical practice is broadly divided between generalists and specialists. General practitioners provide comprehensive, continuing care to individuals and families. Specialists, however, focus on specific patient populations or methods of treatment.

Globally, the phrase "physician and surgeon" is often used as a collective term to describe any medical practitioner regardless of their specific specialty. This terminology is frequently employed by state medical boards in the US and provincial bodies in Canada.

: Medical doctors per 1,000 people as of 2018[15]

Health, Ethics, and Biomedicine

Conventional Western medicine is based on biomedicine. However, medical anthropologists note that all health systems, including biomedicine, are influenced by cultural contexts. Alternative traditions, such as Ayurveda, Unani medicine, and homeopathy, offer different perspectives on health and disease.

There is an ongoing professional debate regarding whether doctors should serve as public health role models. Evidence suggests that professional medical knowledge positively impacts doctors' own lifestyles. For instance, US male doctors show lower rates of respiratory diseases, alcohol-related deaths, and certain cancers compared to the general population.

Education, Regulation, and Oversight

Medical education varies globally, but all practitioners must earn a university medical degree to seek licensure. Government permission to practice is standard in most jurisdictions to protect public safety and regulate government-subsidized care.

Professional oversight focuses on reducing medical errors and malpractice. In the US, the 67 State Medical Boards use tools like the National Practitioner Data Bank and the AMA Physician Profile Service to report disciplinary actions and ensure reciprocal accountability across state lines.

: Jackson Memorial Hospital in Miami, the primary teaching hospital for the Miller School of Medicine at the University of Miami

Summary of Medical Roles

Comparison of Medical Practitioner Terminology

Region/Context	Term: Physician	Term: Surgeon	General Term
United Kingdom	Internal Medicine Specialist	Operative Specialist	Medical Practitioner
North America	Any Licensed Medical Doctor	Specialist in Surgery	Physician
Global/Legal	Practitioner of Physic	Manual Procedure Specialist	Physician and Surgeon

Frequently Asked Questions

What is the difference between a physician and a surgeon in the UK?

In the UK, a physician is a specialist in internal medicine who primarily treats patients with medication, whereas a surgeon specializes in manual and operative procedures.

How is the term "physician" used differently in North America?

In the US and Canada, "physician" is a broad term encompassing all medical practitioners with a professional degree, including both MDs and DOs.

What is a hospitalist?

A hospitalist is a specialist in internal medicine who practices primarily or exclusively within a hospital environment. They make up approximately 19% of all US general internists.

How are doctors regulated in the United States?

Doctors are regulated at the state level by Medical Boards. These boards monitor performance and use national databases to share disciplinary reports to ensure that corrective actions are taken across different states.

Do doctors generally have better health than the general public?

Yes, studies indicate that doctors often have a higher life expectancy and lower rates of certain conditions, such as respiratory diseases and alcohol-related deaths, likely due to their professional health knowledge.