Attention deficit hyperactivity disorder (ADHD) is a mental disorder of the neurodevelopmental type. It is characterized by difficulty paying attention, excessive activity, and behavior without regards to consequences, which are otherwise not appropriate for a person's age. There are also often problems with regulation of emotions. The symptoms appear before a person is twelve years old, are present for more than six months, and cause problems in at least two settings (such as school, home, or recreational activities). In children, problems paying attention may result in poor school performance. Additionally there is an association with other mental disorders and substance misuse. Although it causes impairment, particularly in modern society, many people with ADHD can have sustained attention for tasks they find interesting or rewarding (known as hyperfocus)

Anesthesiologist assistants are qualified by advanced graduate medical education and clinical training to work in under the medical direction of a physician anesthesiologist in developing and implementing the anesthesia care plan. The anesthesiologist assistant works under the medical direction of a physician anesthesiologist as an assistant and is an integral member of the anesthesia care team. Anesthesiologist assistants, under the direction of physician anesthesiologists, obtain pre-anesthetic health histories, perform preoperative physical exams, order and interpret laboratory and radiological studies, order preoperative medications prior to surgery, establish non-invasive and invasive monitors, use advanced airway skills to intubate patients, administer medications, IV fluids and blood products, evaluate and treat life-threatening situations, and execute general, local, and regional anesthetic techniques, as delegated by the anesthesiologist.

Art therapy may focus on the creative art-making process itself, as therapy, or on the analysis of expression gained through an exchange of patient and therapist interaction. The psychoanalytic approach was one of the earliest forms of art psychotherapy. This approach employs the transference process between the therapist and the client who makes art. The therapist interprets the client's symbolic self-expression as communicated in the art and elicits interpretations from the client. Analysis of transference is no longer always a component.

Athletic trainer is a certified and licensed health care professional who practices in the field of sports medicine. Athletic training has been recognized by the American Medical Association (AMA) as an allied health care profession since 1990

An audiologist is a health-care professional specializing in identifying, diagnosing, treating, and monitoring disorders of the auditory and vestibular systems. Audiologists are trained to diagnose, manage and/or treat hearing, tinnitus, or balance problems. They dispense, manage, and rehabilitate hearing aids and assess candidacy for and map cochlear implants. They counsel families through a new diagnosis of hearing loss in infants, and help teach coping and compensation skills to late-deafened adults. They also help design and implement personal and industrial hearing safety programs, newborn hearing screening programs, school hearing screening programs, and provide special or custom fitted ear plugs and other hearing protection devices to help prevent hearing loss. Audiologists are trained to evaluate peripheral vestibular disorders originating from pathologies of the vestibular portion of the inner ear. They also provide treatment for certain vestibular and balance disorders such as Benign Paroxysmal Positional Vertigo (BPPV). In addition, many audiologists work as auditory or acoustic scientists in a research capacity.

"An autotransfusionist, also known as a perioperative blood management technologist, is a specialized allied health professional who operates the cell saver machine during surgeries that expect significant blood loss.
The autotransfusionist is responsible for collecting shed blood from the patient during the operation, scrubs or cleans the blood of impurities, then makes it available to be reinfused into the patient. The process is commonly known as ""cell-saver"" and is considered far superior to the use of blood from a donor, because it reduces the possibility of infection and provides more functional cells back to the patient. Because the blood is recirculated, there is no limit to the amount of blood that can be given back to the patient. Autotransfusion can be achieved in the operating room, intensive care unit, and emergency department and require varying degrees of expertise depending on the procedure"

Technologists who use ultrasound to examine the heart chambers, valves, and vessels are referred to as cardiac sonographers. They use ultrasound instrumentation to create images called echocardiograms. An echocardiogram may be performed while the patient is either resting or physically active. Technologists may administer medication to physically active patients to assess their heart function. Cardiac sonographers also may assist physicians who perform transesophageal echocardiography, which involves placing a tube in the patient's esophagus to obtain ultrasound images.

Medical laboratory scientists work in all areas of the clinical laboratory, including blood banking, chemistry, hematology, immunology, histology and microbiology . They perform a full range of laboratory tests – from simple prenatal blood tests to more complex tests to uncover diseases such as HIV/AIDS, diabetes, and cancer. They are also responsible for confirming the accuracy of test results, and reporting laboratory findings to pathologists and other physicians. The information that a medical laboratory scientist gives to the doctor influences the medical treatment a patient will receive. Medical laboratory scientists operate complex electronic equipment, computers, and precision instruments costing millions of dollars.

Clinical neurophysiology is a medical specialty that studies the central and peripheral nervous systems through the recording of bioelectrical activity, whether spontaneous or stimulated. It encompasses both research regarding the pathophysiology along with clinical methods used to diagnose diseases involving both central and peripheral nervous systems. Examinations in the clinical neurophysiology field are not limited to tests conducted in a laboratory. It is thought of as an extension of a neurologic consultation. Tests that are conducted are concerned with measuring the electrical functions of the brain, spinal cord, and nerves in the limbs and muscles. It can give the precise definition of site, the type and degree of the lesion, along with revealing the abnormalities that are in question. Due to these abilities, clinical neurophysiology is used to mainly help diagnose diseases rather than treat them.

A clinical officer (CO) is a gazetted officer who is qualified and licensed to practice medicine. In Kenya the title is reserved for members of the medical profession who have studied clinical medicine and surgery and have graduated from an accredited medical training institution, have completed an internship year at a teaching hospital and are registered and licensed to practice by the Clinical Officers Council. Legally, use of the title by unregistered persons is prohibited and punishable by upto five years in jail with or without a fine.

Dental hygienist or oral hygienist is a licensed dental professional, registered with a dental association or regulatory body within their country of practice. Prior to completing clinical and written board examinations, registered dental hygienists must have either an Associate's or Bachelor's degree in Dental Hygiene from an accredited college or university. Once registered, hygienists are primary healthcare professionals who work independently of or alongside dentists and other dental professionals to provide full oral health care.

A dental therapist is a member of the dental team who provides preventative and restorative dental care, usually for children and adolescents. The precise role varies and is dependent on the therapist's education and the various dental regulations and guidelines of each country.

Denturism is defined as the practice by denturists of examining oral health, planning treatment, making artificial dentures including other removable oral appliances and fitting them to patients.

A nutritionist is a person who advises others on matters of food and nutrition and their impacts on health. Some people specialize in particular areas, such as sports nutrition, public health, or animal nutrition, among other disciplines.

Technologists who use ultrasound to examine the heart chambers, valves, and vessels are referred to as cardiac sonographers. They use ultrasound instrumentation to create images called echocardiograms. An echocardiogram may be performed while the patient is either resting or physically active. Technologists may administer medication to physically active patients to assess their heart function. Cardiac sonographers also may assist physicians who perform transesophageal echocardiography, which involves placing a tube in the patient's esophagus to obtain ultrasound images.

EMTs are most commonly found working in ambulances, but should not be confused with "ambulance drivers" or "ambulance attendants" – ambulance staff who in the past were not trained in emergency care or driving.

Environmental Health Officers (also known as Public Health Inspectors or Environmental Health Practitioners) are responsible for carrying out measures for protecting public health, including administering and enforcing legislation related to environmental health and providing support to minimize health and safety hazards. Environmental Health Practitioners are multi-skilled in many areas with individuals being highly trained, usually to degree level, and often requiring additional professional training, professional competency assessment and continuing professional development in order to continue to practise in the field. They are involved in a variety of activities, for example inspecting food facilities, investigating public health nuisances, and implementing disease control, conducting work place safety assessments and accident investigation. Environmental health officers are focused on prevention, consultation, investigation, and education of the community regarding health risks and maintaining a safe environment.

"Exercise physiology is the physiology of physical exercise. It is one of the allied health professions that involves the study of the acute responses and chronic adaptations to exercise. Understanding the effect of exercise involves studying specific changes in muscular, cardiovascular, and neurohumoral systems that lead to changes in functional capacity and strength."

Health care, health-care, or healthcare - is the maintenance or improvement of health via the prevention, diagnosis, and treatment of disease, illness, injury, and other physical and mental impairments in people.

Lactation consultant is a health professional who specializes in the clinical management of breastfeeding. The International Board of Lactation Consultant Examiners (IBLCE) certifies lactation consultants who meet its criteria and have passed its exam.

Massage is the manipulation of soft tissues in the body. Massage techniques are commonly applied with hands, fingers, elbows, knees, forearms, feet, or a device. The purpose of massage is generally for the treatment of body stress or pain. A person who was professionally trained to give massages was traditionally known as a masseur (male) or a masseuse (female), but those titles are outmoded, and carry some negative connotations. In the United States, the title massage therapist has been recognized as a business norm for those who have been professionally trained to give massages.

An allied health professional who supports the work of physicians and other health professionals, usually in a clinic setting.

A clinical coder – also known as clinical coding officer, diagnostic coder, medical coder, nosologist or medical records technician – is a health information professional whose main duties are to analyse clinical statements and assign standard codes using a classification system. The data produced are an integral part of health information management, and are used by local and national governments, private healthcare organizations and international agencies for various purposes, including medical and health services research, epidemiological studies, health resource allocation, case mix management, public health programming, medical billing, and public education.

Medical laboratory scientist (MLS), also traditionally referred to as a clinical laboratory scientist (CLS), or medical technologist (MT), is a healthcare professional who performs chemical, hematological, immunologic, histopathological, cytopathological, microscopic, and bacteriological diagnostic analyses on body fluids such as blood, urine, sputum, stool, cerebrospinal fluid (CSF), peritoneal fluid, pericardial fluid, and synovial fluid, as well as other specimens. Medical laboratory scientists work in clinical laboratories at hospitals, reference labs, biotechnology labs and non-clinical industrial labs.

Medical Radiation Scientists (MRS) (also referred to as Radiologic Technologists) are healthcare professionals who perform complex diagnostic imaging studies on patients or plan and administer radiation treatments to cancer patients. Medical radiation scientists include diagnostic radiographers, nuclear medicine radiographers, magnetic resonance radiographers, medical/cardiac sonographers, and radiation therapists. Most medical radiation scientists work in imaging clinics and hospitals' imaging departments with the exception of Radiation Therapists, who work in specialised cancer centers and clinics.

A medical scribe is a person, or paraprofessional, who specializes in charting physician-patient encounters in real time, such as during medical examinations. They also find information and people for physicians and complete forms needed for patient care. Depending on which area of practice the scribe works in, the position may also be called clinical scribe, ER scribe or ED scribe (in the emergency department), or just scribe (when the context is implicit). A scribe is trained in health information management and the use of health information technology to support it. A scribe can work on-site (at a hospital or clinic) or remotely from a HIPAA-secure facility. Medical scribes who work at an off-site location are known as virtual medical scribes.

Medical transcription, also known as MT, is an allied health profession dealing with the process of transcribing voice-recorded medical reports that are dictated by physicians, nurses and other healthcare practitioners. Medical reports can be voice files, notes taken during a lecture, or other spoken material. These are dictated over the phone or uploaded digitally via the Internet or through smart phone apps.

Is the science and practice of establishing the diagnosis, prognosis, treatment, and prevention of disease. 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, among others.

Music therapy is an evidence-based clinical use of musical interventions to improve clients' quality of life. Music therapists use music and its many facets— physical, emotional, mental, social, aesthetic, and spiritual— to help clients improve their health in cognitive, motor, emotional, communicative, social, sensory, and educational domains by using both active and receptive music experiences. These experiences include improvisation, re-creation, composition, receptive methods, and discussion of music.

Occupational therapy (OT) is the use of assessment and intervention to develop, recover, or maintain the meaningful activities, or occupations, of individuals, groups, or communities. It is an allied health profession performed by occupational therapists and occupational therapy assistants (OTA). OTs often work with people with mental health problems, disabilities, injuries, or impairments.

Operating department practitioners (ODPs) are a type of health care provider involved with the overall planning and delivery of perioperative care. They are mainly employed in surgical operating departments but can also be found in other clinical areas, including emergency departments, intensive care units (ICUs), and ambulance services.

Orthoptics is a profession allied to the eye care profession whose primary emphasis is the diagnosis and non-surgical management of strabismus (wandering eye), amblyopia (lazy eye) and eye movement disorders.[1] The word orthoptics comes from the Greek words ὀρθός orthos, "straight" and ὀπτικός optikοs, "relating to sight" and much of the practice of orthoptists concerns refraction and muscular eye control.[2] Orthoptists are trained professionals who specialize in orthoptic treatment. With specific training, in some countries orthoptists may be involved in monitoring of some forms of eye disease, such as glaucoma, cataract screening and diabetic retinopathy.

Orthotics (Greek: Ορθός, romanized: ortho, lit. 'to straighten, to align') is a medical specialty that focuses on the design and application of orthoses. An orthosis (plural: orthoses) is "an externally applied device used to modify the structural and functional characteristics of the neuromuscular and skeletal system"

Osteopathy is a type of alternative medicine that emphasizes physical manipulation of muscle tissue and bones.

Paramedic is a specialist healthcare professional who responds to emergency calls for medical help outside of a hospital. Paramedics mainly work as part of the emergency medical services (EMS), most often in ambulances. The scope of practice of a paramedic varies among countries, but generally includes autonomous decision making around the emergency care of patients.

Pedorthist is a professional who has specialized training to modify footwear and employ supportive devices to address conditions which affect the feet and lower limbs. They are trained in the assessment of lower limb anatomy and biomechanics, and the appropriate use of corrective footwear – including shoes, shoe modifications and other pedorthic devices.

Perfusionist, also known as a perfusiologist or clinical perfusion scientist, is a healthcare professional who operates the cardiopulmonary bypass machine (heart–lung machine) during cardiac surgery and other surgeries that require cardiopulmonary bypass to manage the patient's physiological status. As a member of the cardiovascular surgical team, the perfusionist helps maintain blood flow to the body's tissues as well as regulate levels of oxygen and carbon dioxide in the blood.

Phlebotomy is the process of making a puncture in a vein with a needle, for the purpose of taking blood. The procedure itself is known as a venipuncture. A person who performs phlebotomy is called a "phlebotomist", although doctors, nurses, medical laboratory scientists and others do portions of phlebotomy procedures in many countries.

Physical therapy (PT), also known as physiotherapy, is one of the allied health professions that, by using evidence-based kinesiology, electrotherapy, shockwave modality, exercise prescription, joint mobilization and health education, treats conditions such as chronic or acute pain, soft tissue injuries, cartilage damage, arthritis, gait disorders and physical impairments typically of musculoskeletal, cardiopulmonary, neurological and endocrinological origins. Physical therapy is used to improve a patient's physical functions through physical examination, diagnosis, prognosis, physical intervention, rehabilitation and patient education. It is practiced by physical therapists (known as physiotherapists in many countries).

Physician assistant (PA) is a health care practitioner who practices medicine in collaboration with or under the (indirect) supervision of a physician, depending on state laws (equivalent to a nurse practitioner). Physicians do not need to be on-site with PAs and collaboration or supervision often occurs via electronic means when consults are necessary.

A podiatrist (/poʊˈdaɪətrɪst/ poh-dye-eh-trist), also known as a podiatric physician or foot and ankle surgeon, is a medical professional devoted to the treatment of disorders of the foot, ankle, and lower extremity.[2] The term originated in North America, but has now become the accepted term in the English-speaking world for all practitioners of podiatric medicine.

Psychologist studies normal and abnormal mental states, perceptual, cognitive, emotional, and social processes and behavior by experimenting with, and observing, interpreting, and recording how individuals relate to one another and to their environments.

Public health has been defined as "the science and art of preventing disease, prolonging life and promoting human health through organized efforts and informed choices of society, organizations, public and private, communities and individuals" Analyzing the health of a population and the threats it faces is the basis for public health.The public can be as small as a handful of people or as large as a village or an entire city; in the case of a pandemic it may encompass several continents. The concept of health takes into account physical, psychological and social well-being. As such, according to the World Health Organization, it is not merely the absence of disease or infirmity.

Radiographers, also known as radiologic technologists, diagnostic radiographers and medical radiation technologists are healthcare professionals who specialise in the imaging of human anatomy for the diagnosis and treatment of pathology. Radiographers are infrequently, and almost always erroneously, known as x-ray technicians. In countries that use the title radiologic technologist they are often informally referred to as techs in the clinical environment; this phrase has emerged in popular culture such as television programmes.The term radiographer can also refer to a therapeutic radiographer, also known as a radiation therapist.

A radiation therapist, therapeutic radiographer or radiotherapist is an allied health professional who works in the field of radiation oncology. Radiation therapists plan and administer radiation treatments to cancer patients in most Western countries including the United Kingdom, Australia, most European countries, and Canada, where the minimum education requirement is often a baccalaureate degree or postgraduate degrees in radiation therapy. Radiation therapists (with master's and doctoral degrees) can also prescribe medications and radiation, interpret tests results, perform follow ups, reviews, and provide consultations to cancer patients in the United Kingdom and Ontario, Canada (possibly in Australia and New Zealand in the future as well). In the United States, radiation therapists have a lower educational requirement (at least an associate degree of art, though many graduate with a bachelor's degree) and often require postgraduate education and certification (CMD, certified medical dosimetrist) in order to plan treatments.

According to the American Therapeutic Recreation Association (ATRA), recreational therapy or therapeutic recreation (TR) is a systematic process that utilizes recreation (leisure) and other activities as interventions to address the assessed needs of individuals with illnesses and/or disabling conditions, as a means to psychological and physical health, recovery and well-being. Recreational therapy may also be simply referred to as recreation therapy, in short it is the utilization and enhancement of leisure.

Rehabilitation Counselors can be found in private practice, in rehabilitation facilities, hospitals, universities, schools, government agencies, insurance companies and other organizations where people are being treated for congenital or acquired disabilities. Over time, with the changes in social work being more psychotherapy-oriented, rehabilitation counselors take on more and more community engagement work, especially as it relates to special populations. Some rehabilitation counselors focus solely on community engagement through vocational services, others in various states qualify as both a certified rehabilitation counselor (CRC) and a licensed professional counselor (LPC), enabling them to focus on psychotherapy.

"Dialysis (from Greek διάλυσις, Dialysis, ""dissolution""; from διά, dia, ""through"", and λύσις, lysis, ""loosening or splitting"") is the process of removing excess water, solutes, and toxins from the blood in people whose kidneys can no longer perform these functions naturally. This is referred to as renal replacement therapy.Dialysis is used in patients with rapidly developing loss of kidney function, called acute kidney injury (previously called acute renal failure), or slowly worsening kidney function, called Stage 5 chronic kidney disease, (previously called chronic kidney failure and end-stage renal disease and end-stage kidney disease).Dialysis is used as a temporary measure in either acute kidney injury or in those awaiting kidney transplant and as a permanent measure in those for whom a transplant is not indicated or not possible.

A respiratory therapist is a specialized healthcare practitioner trained in pulmonary medicine in order to work therapeutically with people suffering from pulmonary disease. Respiratory therapists graduate from a college or university with a certification in respiratory therapy and have passed a national board certifying examination.

Social work is an academic discipline and profession that concerns itself with individuals, families, groups and communities in an effort to enhance social functioning and overall well-being. Social functioning is the way in which people perform their social roles, and the structural institutions that are provided to sustain them. Social work applies social sciences, such as sociology, psychology, political science, public health, community development, law, and economics, to engage with client systems, conduct assessments, and develop interventions to solve social and personal problems; and to bring about social change. Social work practice is often divided into micro-work, which involves working directly with individuals or small groups; and macro-work, which involves working with communities, and - within social policy - fostering change on a larger scale.

A sonographer is a healthcare professional who specialises in the use of ultrasonic imaging devices to produce diagnostic images, scans, videos or three-dimensional volumes of anatomy and diagnostic data, frequently a radiographer, but may be any healthcare professional with the appropriate training. The requirements for clinical practice vary greatly by country. Sonography requires specialised education and skills to acquire, view, analyze, and optimize information in the image. Due to the high levels of decisional latitude and diagnostic input, sonographers have a high degree of responsibility in the diagnostic process. Many countries require medical sonographers to have professional certification. Sonographers have core knowledge in ultrasound physics, cross-sectional anatomy, physiology, and pathology.

Speech-Language Pathology is a field of expertise practiced by a clinician known as a speech-language pathologist (SLP) or a speech therapist. SLP is considered a "related health profession" or "allied health profession" along with audiology, behavior analysis, optometry, occupational therapy, clinical psychology, physical therapy, and others.

Central sterile services department (CSSD), also called sterile processing department (SPD), sterile processing, central supply department (CSD), or central supply, is an integrated place in hospitals and other health care facilities that performs sterilization and other actions on medical devices, equipment and consumables; for subsequent use by health workers in the operating theatre of the hospital and also for other aseptic procedures, e.g. catheterization, wound stitching and bandaging in a medical, surgical, maternity or paediatric ward.

A surgical technologist, also called a scrub, scrub tech, surgical technician, or operating room technician, is an allied health professional working as a part of the team delivering surgical care. Surgical technologists are members of the surgical team.