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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