Library of Congress Classification Outline – Class R



Subclass R


R5-920 Medicine (General)

R5-130.5 General works

R131-687 History of medicine. Medical expeditions

R690-697 Medicine as a profession. Physicians

R702-703 Medicine and the humanities. Medicine and disease in relation to

history, literature, etc.

R711-713.97 Directories

R722-722.32 Missionary medicine. Medical missionaries

R723-726 Medical philosophy. Medical ethics

R726.5-726.8 Medicine and disease in relation to psychology. Terminal care. Dying

R727-727.5 Medical personnel and the public. Physician and the public

R728-733 Practice of medicine. Medical practice economics

R735-854 Medical education. Medical schools. Research

R855-855.5 Medical technology

R856-857 Biomedical engineering. Electronics. Instrumentation

R858-859.7 Computer applications to medicine. Medical informatics

R864 Medical records

R895-920 Medical physics. Medical radiology. Nuclear medicine


Subclass RA


RA1-1270 Public aspects of medicine

RA1-418.5 Medicine and the state

RA396 Regulation of medical education. Licensure

RA398 Registration of physicians, pharmacists, etc.

RA399 Regulation of medical practice. Evaluation and quality control

of medical care. Medical audit

RA405 Death certification

RA407-409.5 Health status indicators. Medical statistics and surveys

RA410-410.9 Medical economics. Economics of medical care. Employment

RA411-415 Provisions for personal medical care. Medical care plans

RA418-418.5 Medicine and society. Social medicine. Medical sociology

RA421-790.95 Public health. Hygiene. Preventive medicine

RA428-428.5 Public health laboratories, institutes, etc.

RA440-440.87 Study and teaching. Research

RA565-600 Environmental health

Including sewage disposal, air pollution, nuisances,

water supply

RA601-602 Food and food supply in relation to public health

RA604-618 Parks, public baths, public carriers, buildings, etc.

RA619-637 Disposal of the dead. Undertaking. Burial. Cremation.


RA638 Immunity and immunization in relation to public health

RA639-642 Transmission of disease


RA643-645 Disease (Communicable and noninfectious) and public health

RA645.3-645.37 Home health care services

RA645.5-645.9 Emergency medical services

RA646-648.3 War and public health

RA648.5-767 Epidemics. Epidemiology. Quarantine. Disinfection

RA771-771.7 Rural health and hygiene. Rural health services

RA773-788 Personal health and hygiene

Including clothing, bathing, exercise, travel, nutrition,

sleep, sex hygiene

RA790-790.95 Mental health. Mental illness prevention

RA791-954 Medical geography. Climatology. Meteorology

RA960-1000.5 Medical centers. Hospitals. Dispensaries. Clinics

Including ambulance service, nursing homes, hospices

RA1001-1171 Forensic medicine. Medical jurisprudence. Legal medicine

RA1190-1270 Toxicology. Poisons


Subclass RB


RB1-214 Pathology

RB1-17 General works

RB24-33 Pathological anatomy and histology

RB37-56.5 Clinical pathology. Laboratory technique

RB57 Post-mortem examination. Autopsies

RB127-150 Manifestations of disease

RB151-214 Theories of disease. Etiology. Pathogenesis


Subclass RC


RC31-1245 Internal medicine

RC49-52 Psychosomatic medicine

RC71-78.7 Examination. Diagnosis

Including radiography

RC81-82 Popular medicine

RC86-88.9 Medical emergencies. Critical care. Intensive care. First aid

RC91-103 Disease due to physical and chemical agents

RC109-216 Infectious and parasitic diseases

RC251 Constitutional diseases (General)

RC254-282 Neoplasms. Tumors. Oncology

Including cancer and carcinogens

RC306-320.5 Tuberculosis

RC321-571 Neurosciences. Biological psychiatry. Neuropsychiatry

RC346-429 Neurology. Diseases of the nervous system

Including speech disorders

RC435-571 Psychiatry

RC475-489 Therapeutics. Psychotherapy

RC490-499 Hypnotism and hypnosis. Suggestion therapy

RC500-510 Psychoanalysis

RC512-569.5 Psychopathology

RC512-528 Psychoses

RC530-552 Neuroses

RC554-569.5 Personality disorders. Behavior problems


Including sexual problems, drug abuse,

suicide, child abuse

RC569.7-571 Mental retardation. Developmental disabilities

RC581-951 Specialties of internal medicine

RC581-607 Immunologic diseases. Allergy

RC620-627 Nutritional diseases. Deficiency diseases

RC627.5-632 Metabolic diseases

RC633-647.5 Diseases of the blood and blood-forming organs

RC648-665 Diseases of the endocrine glands. Clinical endocrinology

RC666-701 Diseases of the circulatory (Cardiovascular) system

RC705-779 Diseases of the respiratory system

RC799-869 Diseases of the digestive system. Gastroenterology

RC870-923 Diseases of the genitourinary system. Urology

RC924-924.5 Diseases of the connective tissues

RC925-935 Diseases of the musculoskeletal system

RC952-1245 Special situations and conditions

RC952-954.6 Geriatrics

RC955-962 Arctic medicine. Tropical medicine

RC963-969 Industrial medicine. Industrial hygiene

RC970-986 Military medicine. Naval medicine

RC1000-1020 Submarine medicine

RC1030-1160 Transportation medicine

Including automotive, aviation, and space medicine

RC1200-1245 Sports medicine


Subclass RD


RD1-811 Surgery

RD1-31.7 General works

RD32-33.9 Operative surgery. Technique of surgical operations

RD49-52 Surgical therapeutics. Preoperative and postoperative care

RD57 Surgical pathology

RD58 Reparative processes after operations (Physiological)

RD59 Surgical shock. Traumatic shock

RD63-76 Operating rooms and theaters. Instruments, apparatus, and


RD78.3-87.3 Anesthesiology

RD91-91.5 Asepsis and antisepsis. Sterilization (Operative)

RD92-97.8 Emergency surgery. Wounds and injuries

RD98-98.4 Surgical complications

RD99-99.35 Surgical nursing

RD101-104 Fractures (General)

RD118-120.5 Plastic surgery. Reparative surgery

RD120.6-129.8 Transplantation of organs, tissues, etc.

RD130 Prosthesis. Artificial organs

RD137-145 Surgery in childhood, adolescence, pregnancy, old age

RD151-498 Military and naval surgery

RD520-599.5 Surgery by region, system, or organ

RD651-678 Neoplasms. Tumors. Oncology

RD680-688 Diseases of the locomotor system (Surgical treatment)

RD701-811 Orthopedic surgery


RD792-811 Physical rehabilitation


Subclass RE


RE1-994 Ophthalmology

RE75-79 Examination. Diagnosis

RE80-87 Eye surgery

RE88 Ophthalmic nursing

RE89 Eye banks

RE91-912 Particular diseases of the eye

RE918-921 Color vision tests, charts, etc.

RE925-939 Refraction and errors of refraction and accommodation

RE939.2-981 Optometry. Opticians. Eyeglasses

RE986-988 Artificial eyes and other prostheses

RE991-992 Ocular therapeutics


Subclass RF


RF1-547 Otorhinolaryngology

RF110-320 Otology. Diseases of the ear

RF341-437 Rhinology. Diseases of the nose, accessory sinuses, and nasopharynx

RF460-547 Laryngology. Diseases of the throat


Subclass RG


RG1-991 Gynecology and obstetrics

RG104-104.7 Operative gynecology

RG133-137.6 Conception. Artificial insemination. Contraception

RG138 Sterilization of women

RG159-208 Functional and systemic disorders. Endocrine gynecology

RG211-483 Abnormalities and diseases of the female genital organs

RG484-485 Urogynecology and obstetric urology. Urogynecologic surgery

RG491-499 Diseases of the breast

RG500-991 Obstetrics

RG551-591 Pregnancy

RG600-650 The embryo and fetus

RG648 Spontaneous abortion. Miscarriage

RG651-721 Labor. Parturition

RG725-791 Obstetric operations. Operative obstetrics

RG801-871 Puerperal state

RG940-991 Maternal care. Prenatal care services


Subclass RJ


RJ1-570 Pediatrics

RJ47.3-47.4 Genetic aspects

RJ50-51 Examination. Diagnosis

RJ52-53 Therapeutics

RJ59-60 Infant and neonatal morbidity and mortality

RJ91 Supposed prenatal influence. Prenatal culture. Stirpiculture


RJ101-103 Child health. Child health services

RJ125-145 Physiology of children and adolescents

RJ206-235 Nutrition and feeding of children and adolescents

RJ240 Immunization of children (General)

RJ242-243 Hospital care

RJ245-247 Nursing of children. Pediatric nursing

RJ250-250.3 Premature infants

RJ251-325 Newborn infants

Including physiology, care, treatment, diseases

RJ370-550 Diseases of children and adolescents

RJ499-507 Mental disorders. Child psychiatry


Subclass RK


RK1-715 Dentistry

RK58-59.3 Practice of dentistry. Dental economics

RK60.7-60.8 Preventive dentistry

RK280 Oral and dental anatomy and physiology

RK301-493 Oral and dental medicine. Pathology. Diseases

RK501-519 Operative dentistry. Restorative dentistry

RK520-528 Orthodontics

RK529-535 Oral surgery

RK641-667 Prosthetic dentistry. Prosthodontics


Subclass RL


RL1-803 Dermatology

RL87-94 Care and hygiene

RL95 Pathological anatomy

RL110-120 Therapeutics

RL130-169 Diseases of the glands, hair, nails

RL201-331 Hyperemias, inflammations, and infections of the skin

RL391-489 Atrophies. Hypertrophies

RL675 Chronic ulcer of the skin. Bedsores

RL701-751 Diseases due to psychosomatic and nerve disorders.


RL760-785 Diseases due to parasites

RL790 Pigmentations. Albinism

RL793 Congenital disorders of the skin. Nevi. Moles


Subclass RM


RM1-950 Therapeutics. Pharmacology

RM138 Drug prescribing

RM139 Prescription writing

RM146-146.7 Misuse of therapeutic drugs. Medication errors

RM147-180 Administration of drugs and other therapeutic agents

RM182-190 Other therapeutic procedures

Including acupuncture, pneumatic aspiration, spinal

puncture, pericardial puncture


RM214-258 Diet therapy. Dietary cookbooks

RM259 Vitamin therapy

RM260-263 Chemotherapy

RM265-267 Antibiotic therapy. Antibiotics

RM270-282 Immunotherapy. Serotherapy

RM283-298 Endocrinotherapy. Organotherapy

RM300-666 Drugs and their actions

RM671-671.5 Nonprescription drugs. Patent medicines

RM695-893 Physical medicine. Physical therapy

Including massage, exercise, occupational therapy,

hydrotherapy, phototherapy, radiotherapy,

thermotherapy, electrotherapy

RM930-931 Rehabilitation therapy

RM950 Rehabilitation technology


Subclass RS


RS1-441 Pharmacy and materia medica

RS125-131.9 Formularies. Collected prescriptions

RS139-141.9 Pharmacopoeias

RS151.2-151.9 Dispensatories

RS153-441 Materia medica

RS160-167 Pharmacognosy. Pharmaceutical substances (Plant, animal, and


RS189-190 Assay methods. Standardization. Analysis

RS192-199 Pharmaceutical technology

RS200-201 Pharmaceutical dosage forms

RS250-252 Commercial preparations. Patent medicines

RS355-356 Pharmaceutical supplies

RS400-431 Pharmaceutical chemistry

RS441 Microscopical examination of drugs


Subclass RT


RT1-120 Nursing

RT89-120 Specialties in nursing


Subclass RV


RV1-431 Botanic, Thomsonian, and eclectic medicine


Subclass RX


RX1-681 Homeopathy

RX211-581 Diseases, treatment, etc.

RX601-675 Materia medica and therapeutics


Subclass RZ


RZ201-999 Other systems of medicine


RZ201-275 Chiropractic

RZ301-397.5 Osteopathy

RZ399 Osteo-magnetics, neuropathy, etc., A-Z

RZ400-408 Mental healing

RZ409.7-999 Miscellaneous systems and treatments

Including magnetotherapy, mesmerism, naturopathy,

organomic medicine, phrenology, radiesthesia

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