Internal medicine or general internal medicine (in Commonwealth nations) is the medical specialty dealing with the prevention, diagnosis, and treatment of internal diseases. Doctors specializing in internal medicine are called internists, or physicians (without a modifier) in Commonwealth nations. Internists are medical specialists that are skilled in the management of patients who have undifferentiated or multi-system disease processes. Internists care for hospitalized (inpatient) and ambulatory (outpatient) patients and may play a major role in teaching and research. Internists are qualified physicians with postgraduate training in internal medicine and should not be confused with "interns",who are doctors in their first year of residency training (though officially the term intern is no longer universally used).
Internal medicine and family medicine are often confused as equivalent in the United States and Commonwealth nations (see below).
Because internal medicine patients are often seriously ill or require complex investigations, internists do much of their work in hospitals. Internists often have subspecialty interests in diseases affecting particular organs or organ systems. The certification process along with the list of possible sub-specialties vary around the world.
Internal medicine is also a specialty within clinical pharmacy and veterinary medicine.
The etymology of the term internal medicine in English is rooted in the German term Innere Medizincode: deu promoted to code: de from the 19th century. Internal medicine was initially characterized by determination of the underlying "internal" or pathological causes of symptoms and syndromes by use of laboratory investigations in addition to bedside clinical assessment of patients. In contrast, physicians in previous generations, such as the 17th-century physician Thomas Sydenham, who is known as the father of English medicine or "the English Hippocrates", had developed nosology (the study of diseases) via the clinical approach of diagnosis and management, by careful bedside study of the natural history of diseases and their treatment. Sydenham eschewed dissection of corpses and scrutiny of the internal workings of the body, for considering the internal mechanisms and causes of symptoms. It was thus subsequent to the 17th century that there was a rise in anatomical pathology and laboratory studies, with Giovanni Battista Morgagni, an Italian anatomist of the 18th century, being considered the father of anatomical pathology. Laboratory investigations became increasingly significant, with contribution of doctors including German physician and bacteriologist Robert Koch in the 19th century. The 19th century saw the rise of internal medicine that combined the clinical approach with use of investigations. Many early-20th-century American physicians studied medicine in Germany and brought this medical field to the United States. Thus, the name "internal medicine" was adopted in imitation of the existing German term.
Historically, some of the oldest traces of internal medicine can be traced from ancient India and ancient China.The earliest texts about internal medicine are the Ayurvedic anthologies of Charaka.
Internal medicine specialists, also known as general internal medicine specialists or general medicine physicians in Commonwealth countries,are specialist physicians trained to manage particularly complex or multisystem disease conditions that single-organ-disease specialists may not be trained to deal with. They may be asked to tackle undifferentiated presentations that cannot be easily fitted within the expertise of a single-organ specialty, such as dyspnea, fatigue, weight loss, chest pain, confusion or change in conscious state. They may manage serious acute illnesses that affect multiple organ systems at the same time in a single patient, and they may manage multiple chronic diseases that a single patient may have.
Many internal medicine physicians decide to subspecialize in specific organ systems. General internal medicine specialists do not provide necessarily less expertise than single-organ specialists, rather, they are trained for a specific role of caring for patients with multiple simultaneous problems or complex comorbidities.
Perhaps because it is complex to explain treatment of diseases that are not localized to a single-organ, there has been confusion about the meaning of internal medicine and the role of an "internist".Although internists may act as primary care physicians, they are not "family physicians", "family practitioners", or "general practitioners", or "GPs", whose training is not solely concentrated on adults and may include surgery, obstetrics, and pediatrics. The American College of Physicians defines internists as "physicians who specialize in the prevention, detection and treatment of illnesses in adults". While there is overlap in the population served by both internal medicine and family medicine physicians, internists typically focus on adult care with an emphasis on diagnosis while family medicine incorporates holistic care for the entire family unit. Internists also receive significant training in many of the recognized sub-specialties of the profession (see below) and are trained in both inpatient and outpatient settings. Family medicine physicians receive education on a broad range of conditions and typically train in an outpatient setting with minimal experience in a hospital setting. The historical roots of internal medicine lie in the movement to incorporate scientific into medical practice in the 1800s. Family medicine grew from the primary care movement in the 1960s.
The training and career pathways for internists vary considerably across the world.
Many programs require previous undergraduate education prior to medical school admission. This "pre-medical" education is typically four or five years in length. Graduate medical education programs vary in length by country. Medical education programs are tertiary-level courses, undertaken at a medical school attached to a university. In the United States, medical school consists of four years. Hence, gaining a basic medical education may typically take eight years, depending on jurisdiction and university.
Following completion of entry-level training, newly graduated medical practitioners are often required to undertake a period of supervised practice before the licensure, or registration, is granted, typically one or two years. This period may be referred to as "internship", "conditional registration", or "foundation programme". Then, doctors may finally follow specialty training in internal medicine if they wish, typically being selected to training programs through competition. In North America, this period of postgraduate training is referred to as residency training, followed by an optional fellowship if the internist decides to train in a subspecialty.
In the United States and in most countries, residency training for internal medicine lasts three years and centers on secondary and tertiary levels of care. In Commonwealth countries trainees are often called senior house officers for four years after the completion of their medical degree (foundation and core years). After this period, they are able to advance to registrar grade when they undergo a compulsory subspecialty training (including acute internal medicine or a dual subspecialty including internal medicine). This latter stage of training is achieved through competition rather than just by yearly progress as the first years of postgraduate training.
In the United States, three organizations are responsible for the certification of trained internists (i.e., doctors who have completed an accredited residency training program) in terms of their knowledge, skills, and attitudes that are essential for excellent patient care: the American Board of Internal Medicine, the American Osteopathic Board of Internal Medicine and the Board of Certification in Internal Medicine.In the UK, the General Medical Council oversees licensing and certification of Internal Medicine physicians. The Royal Australasian College of Physicians confers fellowship to internists (and sub-specialists) in Australia. The Medical Council of Canada oversees licensing of internists in Canada.
The examples and perspective in this section may not represent a worldwide view of the subject.(December 2010)
In the United States, two organizations are responsible for certification of subspecialists within the field: the American Board of Internal Medicine and the American Osteopathic Board of Internal Medicine. Physicians (not only internists) who successfully pass board exams receive "board certified" status.
The following are the subspecialties recognized by the American Board of Internal Medicine.
The American College of Osteopathic Internists recognizes the following subspecialties:
In the United Kingdom, the three medical Royal Colleges (the Royal College of Physicians of London, the Royal College of Physicians of Edinburgh and the Royal College of Physicians and Surgeons of Glasgow) are responsible for setting curricula and training programmes through the Joint Royal Colleges Postgraduate Training Board (JRCPTB), although the process is monitored and accredited by the independent General Medical Council (which also maintains the specialist register).
Doctors who have completed medical school spend two years in foundation training completing a basic postgraduate curriculum. After two years of Core Medical Training (CT1/CT2), or three years of Internal Medicine Training (IMT1/IMT2/IMT3) as of 2019, since and attaining the Membership of the Royal College of Physicians, physicians commit to one of the medical specialties:
Many training programmes provide dual accreditation with general (internal) medicine and are involved in the general care to hospitalised patients. These are acute medicine, cardiology, Clinical Pharmacology and Therapeutics, endocrinology and diabetes mellitus, gastroenterology, infectious diseases, renal medicine, respiratory medicine and often, rheumatology. The role of general medicine, after a period of decline, was reemphasised by the Royal College of Physicians of London report from the Future Hospital Commission (2013).
The European Board of Internal Medicine (EBIM) was formed as a collaborative effort between the European Union of Medical Specialists (UEMS) - Internal Medicine Section and the European Federation of Internal Medicine (EFIM) to provide guidance on standardizing training and practice of internal medicine throughout Europe.The EBIM published training requirements in 2016 for postgraduate education in internal medicine, and efforts to create a European Certificate of Internal Medicine (ECIM) to facilitate the free movement of medical professionals with the EU are currently underway.
The internal medicine specialist is recognized in every country in the European Union and typically requires five years of multi-disciplinary post-graduate education.The specialty of internal medicine is seen as providing care in a wide variety of conditions involving every organ system and is distinguished from family medicine in that the latter provides a broader model of care the includes both surgery and obstetrics in both adults and children.
Accreditation for medical education and training programs in Australia is provided by the Australian Medical Council (AMC) and the Medical Council of New Zealeand (MCNZ).The Medical Board of Australia (MBA) is the registering body for Australian doctors and provides information to the Australian Health Practitioner Regulation Agency (AHPRA). Medical graduates apply for provisional registration in order to complete intern training. Those completing an accredited internship program are then eligible to apply for general registration. Once the candidate completes the required basic and advanced post-graduate training and a written and clinical examination, the Royal Australasian College of Physicians confers designation Fellow of the Royal Australasian College of Physicians (FRACP). Basic training consists of three years of full-time equivalent (FTE) training (including intern year) and advanced training consists of 3–4 years, depending on specialty. The fields of specialty practice are approved by the Council of Australian Governments (COAG) and managed by the MBA. The following is a list of currently recognized specialist physicians.
After completing medical school, internists in Canada require an additional four years of training. Internists desiring to subspecialize are required to complete two additional years of training that may begin after the third year of internist training.The Royal College of Physicians and Surgeons of Canada (RCPSC) is a national non-profit agency that oversees and accredits medical education in Canada. A full medical license in Internal Medicine in Canada requires a medical degree, a license from the Medical Council of Canada, completion of the required post-graduate education, and certification from the RCPSC. Any additional requirements from separate medical regulatory authorities in each province or territory is also required. Internists may practice in Canada as generalists in Internal Medicine or serve in one of seventeen subspecialty areas. Internists may work in many settings including outpatient clinics, inpatient wards, critical care units, and emergency departments. The currently recognized subspecialties include the following:
Medicine is mainly focused on the art of diagnosis and treatment with medication. The diagnostic process involves gathering data, generating one or more diagnostic hypotheses, and iteratively testing these potential diagnoses against dynamic disease profiles to determine the best course of action for the patient.
Data may be gathered directly from the patient in medical history-taking and physical examination.Previous medical records including laboratory findings, imaging, and clinical notes from other physicians is also an important source of information; however, it is vital to talk to and examine the patient to find out what the patient is currently experiencing to make an accurate diagnosis.
Internists often can perform and interpret diagnostic tests like EKGs and ultrasound imaging (Point-of-care Ultrasound – PoCUS).
Internists who pursue sub-specialties have additional diagnostic tools, including those listed below.
Other tests are ordered, and patients are also referred to specialists for further evaluation. The effectiveness and efficiency of the specialist referral process is an area of potential improvement.
Determining which pieces of information are most important to the next phase of the diagnostic process is of vital importance.It is during this stage that clinical bias like anchoring or premature closure may be introduced. Once key findings are determined, they are compared to profiles of possible diseases. These profiles include findings that are typically associated with the disease and are based on the likelihood that someone with the disease has a particular symptom. A list of potential diagnoses is termed the “differential diagnosis” for the patient and is typically ordered from most likely to least likely, with special attention given to those conditions that have dire consequences for the patient if they were missed. Epidemiology and endemic conditions are also considered in creating and evaluating the list of diagnoses.
The list is dynamic and changes as the physician obtains additional information that makes a condition more (“rule-in”) or less (“rule-out”) likely based on the disease profile.The list is used to determine what information will be acquired next, including which diagnostic test or imaging modality to order. The selection of tests is also based on the physician’s knowledge of the specificity and sensitivity of a particular test.
An important part of this process is knowledge of the various ways that a disease can present in a patient. This knowledge is gathered and shared to add to the database of disease profiles used by physicians. This is especially important in rare diseases.
Communication is a vital part of the diagnostic process. The Internist uses both synchronous and asynchronous communication with other members of the medical care team, including other internists, radiologists, specialists, and laboratory technicians.Tools to evaluate teamwork exist and have been employed in multiple settings.
Communication to the patient is also important to ensure there is informed consent and shared decision-making throughout the diagnostic process.
Treatment modalities generally include both pharmacological and non-pharmacological, depending on the primary diagnosis.Additional treatment options include referral to specialist care including physical therapy and rehabilitation. Treatment recommendations differ in the acute inpatient and outpatient settings. Continuity of care and long-term follow-up is crucial in successful patient outcomes.
Aside from diagnosing and treating acute conditions, the Internist may also assess disease risk and recommend preventive screening and intervention. Some of the tools available to the Internist include genetic evaluation.
Internists also routinely provide pre-operative medical evaluations including individualized assessment and communication of operative risk.
Training the next generation of internists is an important part of the profession. As mentioned above, post-graduate medical education is provided by licensed physicians as part of accredited education programs that are usually affiliated with teaching hospitals.Studies show that there are no differences in patient outcomes in teaching versus non-teaching facilities. Medical research is an important part of most post-graduate education programs, and many licensed physicians continue to be involved in research activities after completing post-graduate training.
Inherent in any medical profession are legal and ethical considerations. Specific laws vary by jurisdiction and may or may not be congruent with ethical considerations.Thus, a strong ethical foundation is paramount to any medical profession. Medical ethics guidelines in the Western world typically follow four principles including beneficence, non-maleficence, patient autonomy, and justice. These principles underlie the patient-physician relationship and the obligation to put the welfare and interests of the patient above their own.
The relationship is built upon the physician obligations of competency, respect for the patient, and appropriate referrals while the patient requirements include decision-making and provides or withdraws consent for any treatment plan. Good communication is key to a strong relationship but has ethical considerations as well, including proper use of electronic communication and clear documentation.
Providing treatment including prescribing medications based on remote information gathering without a proper established relationship is not accepted as good practice with few exceptions.These exceptions include cross-coverage within a practice and certain public health urgent or emergent issues.
The ethics of telemedicine including questions on its impact to diagnosis, physician-patient relationship, and continuity of care have been raised;,however, with appropriate use and specific guidelines, risks may be minimized and the benefits including increased access to care may be realized.
Ethical considerations in financial include accurate billing practices and clearly defined financial relationships. Physicians have both a professional duty and obligation under the justice principle to ensure that patients are provided the same care regardless of status or ability to pay. However, informal copayment forgiveness may have legal ramifications and the providing professional courtesy may have negatively impact care.
Physicians must disclose all possible conflicts of interest including financial relationships, investments, research and referral relationships, and any other instances that may subjugate or give the appearance of subjugating patient care to self-interest.
Other foundational ethical considerations include privacy, confidentiality, accurate and complete medical records, electronic health records, disclosure, and informed decision-making and consent.
Electronic health records have been shown to improve patient care but have risks including data breaches and inappropriate and/or unauthorized disclosure of protected health information.
Withholding information from a patient is typically seen as unethical and in violation of a patient’s right to make informed decisions. However, in situations where a patient has requested not to be informed or to have the information provided to a second party or in an emergency situation in which the patient does not have decision-making capacity, withholding information may be appropriate.
Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness. Contemporary medicine applies biomedical sciences, biomedical research, genetics, and medical technology to diagnose, treat, and prevent injury and disease, typically through pharmaceuticals or surgery, but also through therapies as diverse as psychotherapy, external splints and traction, medical devices, biologics, and ionizing radiation, amongst others.
Neurology is the branch of medicine dealing with the diagnosis and treatment of all categories of conditions and disease involving the brain, the spinal cord and the peripheral nerves. Neurological practice relies heavily on the field of neuroscience, the scientific study of the nervous system.
Nephrology is a specialty of adult internal medicine and pediatric medicine that concerns the study of the kidneys, specifically normal kidney function and kidney disease, the preservation of kidney health, and the treatment of kidney disease, from diet and medication to renal replacement therapy. The word “renal” is an adjective meaning “relating to the kidneys”, and its roots are French or late Latin. Whereas according to some opinions, "renal" and "nephro" should be replaced with "kidney" in scientific writings such as "kidney medicine" or "kidney replacement therapy", other experts have advocated preserving the use of renal and nephro as appropriate including in "nephrology" and "renal replacement therapy", respectively.
A physician, medical practitioner, medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through the study, diagnosis, prognosis 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.
Pathology is the study of the causes and effects of disease or injury. The word pathology also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in the context of modern medical treatment, the term is often used in a narrower fashion to refer to processes and tests that fall within the contemporary medical field of "general pathology", an area which includes a number of distinct but inter-related medical specialties that diagnose disease, mostly through analysis of tissue, cell, and body fluid samples. Idiomatically, "a pathology" may also refer to the predicted or actual progression of particular diseases, and the affix pathy is sometimes used to indicate a state of disease in cases of both physical ailment and psychological conditions. A physician practicing pathology is called a pathologist.
Emergency medicine is the medical speciality concerned with the care of illnesses or injuries requiring immediate medical attention. Emergency physicians continuously learn to care for unscheduled and undifferentiated patients of all ages. As first-line providers, in coordination with Emergency Medical Services, they are primarily responsible for initiating resuscitation and stabilization and performing the initial investigations and interventions necessary to diagnose and treat illnesses or injuries in the acute phase. Emergency physicians generally practise in hospital emergency departments, pre-hospital settings via emergency medical services, and intensive care units. Still, they may also work in primary care settings such as urgent care clinics.
Dermatology is the branch of medicine dealing with the skin. It is a speciality with both medical and surgical aspects. A dermatologist is a specialist medical doctor who manages diseases related to skin, hair, nails, and some cosmetic problems.
Anesthesiology, anaesthesiology, or anaesthesia is the medical specialty concerned with the total perioperative care of patients before, during and after surgery. It encompasses anesthesia, intensive care medicine, critical emergency medicine, and pain medicine. A physician specialized in anesthesiology is called an anesthesiologist, anaesthesiologist, or anaesthetist, depending on the country. In some countries, the terms are synonymous, while in other countries they refer to different positions, and anesthetist is only used for non-physicians, such as nurse anesthetists.
Pulmonology, pneumology or pneumonology is a medical specialty that deals with diseases involving the respiratory tract. It is also known as respirology, respiratory medicine, or chest medicine in some countries and areas.
Hospital medicine is a medical specialty that exists in some countries as a branch of family medicine or internal medicine, dealing with the care of acutely ill hospitalized patients. Physicians whose primary professional focus is caring for hospitalized patients only while they are in the hospital are called hospitalists. Originating in the United States, this type of medical practice has extended into Australia and Canada. The vast majority of physicians who refer to themselves as hospitalists focus their practice upon hospitalized patients. Hospitalists are not necessarily required to have separate board certification in hospital medicine.
Residency or postgraduate training is specifically a stage of graduate medical education. It refers to a qualified physician, veterinarian, dentist or podiatrist (DPM) who practices medicine, veterinary medicine, dentistry, or podiatry, respectively, usually in a hospital or clinic, under the direct or indirect supervision of a senior medical clinician registered in that specialty such as an attending physician or consultant. In many jurisdictions, successful completion of such training is a requirement in order to obtain an unrestricted license to practice medicine, and in particular a license to practice a chosen specialty. In the meantime they practice "on" the license of their supervising physician. An individual engaged in such training may be referred to as a resident, registrar or trainee depending on the jurisdiction. Residency training may be followed by fellowship or sub-specialty training.
A primary care physician (PCP) is a physician who provides both the first contact for a person with an undiagnosed health concern as well as continuing care of varied medical conditions, not limited by cause, organ system, or diagnosis. The term is primarily used in the United States. In the past, the equivalent term was 'general practitioner' in the US; however in the United Kingdom and other countries the term general practitioner is still used.
Acute medicine is a specialty within internal medicine concerned with the immediate and early specialist management of adult patients with a wide range of medical conditions who present in hospital as emergencies. It developed in the United Kingdom in the early 2000s as a dedicated field of medicine, together with the establishment of acute medical units in numerous hospitals. Acute medicine is distinct from the broader field of emergency medicine, which is concerned with the management of all people attending the emergency department, not just those with internal medicine diagnoses.
A medical specialty is a branch of medical practice that is focused on a defined group of patients, diseases, skills, or philosophy. Examples include those branches of medicine that deal exclusively with children (paediatrics), cancer (oncology), laboratory medicine (pathology), or primary care. After completing medical school or other basic training, physicians or surgeons and other clinicians usually further their medical education in a specific specialty of medicine by completing a multiple-year residency to become a specialist.
Internal medicine-pediatrics, or med-peds, is a medical specialty in which doctors train to be board certified in both internal medicine and pediatrics. A residency program in med-peds is four years in length, contrasted with three years for internal medicine or pediatrics alone. Upon completion of a med-peds residency, a doctor can practice in the areas of internal medicine, pediatrics or can complete a fellowship program to further specialize in an internal medicine or pediatrics sub-field.
Addiction medicine is a medical subspecialty that deals with the diagnosis, prevention, evaluation, treatment, and recovery of persons with addiction, of those with substance-related and addictive disorders, and of people who show unhealthy use of substances including alcohol, nicotine, prescription medicine and other illicit and licit drugs. The medical subspecialty often crosses over into other areas, since various aspects of addiction fall within the fields of public health, psychology, social work, mental health counseling, psychiatry, and internal medicine, among others. Incorporated within the specialty are the processes of detoxification, rehabilitation, harm reduction, abstinence-based treatment, individual and group therapies, oversight of halfway houses, treatment of withdrawal-related symptoms, acute intervention, and long term therapies designed to reduce likelihood of relapse. Some specialists, primarily those who also have expertise in family medicine or internal medicine, also provide treatment for disease states commonly associated with substance use, such as hepatitis and HIV infection.
Adolescent medicine also known as adolescent and young adult medicine is a medical subspecialty that focuses on care of patients who are in the adolescent period of development. This period begins at puberty and lasts until growth has stopped, at which time adulthood begins. Typically, patients in this age range will be in the last years of middle school up until college graduation. In developed nations, the psychosocial period of adolescence is extended both by an earlier start, as the onset of puberty begins earlier, and a later end, as patients require more years of education or training before they reach economic independence from their parents.
The American Board of Internal Medicine (ABIM) is a 501(c)(3) nonprofit, self-appointed physician-evaluation organization that certifies physicians practicing internal medicine and its subspecialties. The American Board of Internal Medicine is not a membership society, educational institution, or licensing body.
The American Osteopathic Board of Internal Medicine (AOBIM) is an organization that provides board certification to qualified Doctors of Osteopathic Medicine (D.O.) who specialize in the prevention, diagnosis, and treatment of disease in adults (internists). The board is one of 18 medical specialty certifying boards of the American Osteopathic Association Bureau of Osteopathic Specialists approved by the American Osteopathic Association (AOA), and was established in 1942. As of December 2011, 3,072 osteopathic internal medical physicians held active certification with the AOBIM.
Infectious diseases or ID, also known as infectiology, is a medical specialty dealing with the diagnosis and treatment of infections. An infectious diseases specialist's practice consists of managing nosocomial (healthcare-acquired) infections or community-acquired infections and is historically associated with hygiene, epidemiology, clinical microbiology, travel medicine and tropical medicine.