Classification 2021 Winter Edition

Worldwide source of medical classification resources

Canceled Class Numbers (Cumulative List)

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The National Library of Medicine cancels classification numbers from its schedules for a variety of reasons - most often classification numbers are realigned to better reflect their domain and improve collocation of materials on related concepts.

Since NLM does not reclassify titles when classification numbers change, materials on like subjects may not be shelved together. For example, if a user wishes to find all materials on the pharmacology of hallucinogens, titles cataloged before 1978 are shelved under QV 109 and titles cataloged 1978 and later are found under QV 77.7.

The table of canceled class numbers below lists numbers canceled from 1978 through the current year, the approximate cancellation date, and the new class number for each concept at the time of cancellation. New concepts and terms may have been introduced since the cancellation. The index should always be checked before assigning the classification number.

Note: This list does not include numbers which were, for a very brief time, used to subdivide materials by publication date.

Canceled
Number

Year
Canceled

Subject

Now
Classed in

Human Anatomy

QS 530

2014

Experimental histology

Various numbers

QS 539

1994

Handbooks [Histology]

QS 529

QS 639

1994

Handbooks [Embryology]

QS 629

QS 642

2014

Twinning. Multiple embryo production

WQ 235

Physiology

QT 39

1994

Handbooks [Physiology]

QT 29

QT 162.E4

2014

Electrolytes

Various numbers

QT 162.G7

2020 Summer Edition

Gravitation

WD 720-752

QT 230

2014

Lighting. Air. Sunlight. Living space

QT 162.L5

Biochemistry. Cell Biology and Genetics

QU 4

2017 Summer Edition

General works [Biochemistry. Cell Biology and Genetics]

QU 34

QU 195

2020 Summer Edition

Other factors associated with B vitamins

QU 187-194

Pharmacology

QV 32.5

1981

Discussion of law, Jurisprudence, (Table G)

QV 33

QV 32.6

1981

General coverage (Not Table G)

QV 33.1

QV 34

2012

Experimental pharmacology (General)

QV 20.5

QV 67

1978

Bitters. Carminatives. Adsorbents

QV 66

QV 86

1978

Tranquilizing agents (General)

QV 77.9

QV 93

1978

Morphine substitutes, e.g., Meperidine

QV 92

QV 108

1978

Antidepressive agents

QV 77.5

QV 109

1978

Hallucinogens

QV 77.7

QV 115

2006

Synthetic local anesthetics

QV 113

QV 235

2012

Dyes

QV 240

QV 618

2012

Irritant poisons

Not applicable

QV 667

2012

Systemic poisons. Paralysants

Not applicable

QV 743

1978

Ancient and medieval remedies

QV 11; QV 11.1

QV 767

2002

Herbs

QV 766

QV 770.1

2005

Medicinal Plants (Not Table G)

QV 766

QV 787

2012

Tablets

QV 786.5.T3

QV 790

1978

Pharmaceutical supplies

QV 26; QV 772

QV 832

1978

Laws, etc. [Packaging]

QV 32

Microbiology. Immunology

QW 115

2006

Actinobacteria

QW 125

QW 118

2006

Corynebacterum

QW 125.5.C5

QW 120

2006

Propionibacteriaceae

QW 125.5.P7

QW 128

2019 summer edition

Bacteroidetes

QW 50

QW 130

1978

Caryophanales

[Number never
used at NLM]

QW 145

2019 summer edition

Phototrophic bacteria

QW 131

QW 149

2004

Rickettsiales and chlamydiales

QW 150; QW 152

QW 153

2006

Sheathed bacteria. Budding or
appendaged bacteria

QW 133

QW 164

2016

Vertebrate viruses

QW 160

QW 165.5.P2

2019 summer edition

Papillomaviridae

QW 166

QW 167

1994

Oncolytic viruses

QW 160

QW 168.5.A7

2019 summer edition

Arboviruses

QW 160

QW 168.5.R6

1994

RNA rodent viruses

QW 168

QW 169

2016

Vertebrate viruses, unclassified

QW 160

QW 180.5.M9

2005

Myxomycetes

QX 50

QW 190

2019 summer edition

Bacterial and fungal spores

QW 51; QW 180

QW 660

2019 summer edition

Bacteriolysis

QW 52

QW 730

2019 summer edition

Virulence. Invasiveness

QW 42

Parasitology

QX 50

2019 summer edition

Unicellular eukaryota (General or not elsewhere classified)

QW 200-260

QX 55

2019 summer edition

Amoebozoa

QW 225-230

QX 70

2019 summer edition

Diplomonadida. Trichomonadida. Trypanosomatina

QW 235, QW 250, QW 243

QX 123

2019 summer edition

Apicomplexa

QW 208-214

QX 135

2019 summer edition

Plasmodium

QW 214

QX 140

2019 summer edition

Toxoplasma

QW 212

QX 151

2019 summer edition

Ciliophora

QW 217-220

QX 190

1978

Toxoplasma, et al.

QX 140

QX 195

2010

Cnidaria

Not applicable

QX 207

2019 summer edition

Trichuroidea

QX 203

QX 248

2019 summer edition

Trichostrongyloidea

QX 243

QX 271

2019 summer edition

Oxyuroidea

QX 203

QX 465

1978

Centipedes. Millipedes

QX 460

QX 469

2019 summer edition

Scorpions

QL 548.7-.72

QX 471

2019 summer edition

Spiders

QL 458.4-.42

QX 483

2019 summer edition

Trombiculidae

QX 475

QX 650

2019 summer edition

Insect vectors

QX 500

Clinical Pathology

QY 19

2015

Schools and colleges

QZ 19

QY 35

2016

Molding and casting of anatomic models.
Moulages

QS 26; QS 26.5

QY 105

1978

Animal inoculation

QY 100; SF 757.2

QY 143

2016

Bile pigments

QY 140

QY 147

2016

Function tests

QY 140

QY 275

2021 Winter Edition

Syphilis serodiagnosis

WC 160.5

QY 485

1978

Drugs [clinical analysis of drugs
in blood]

[Number never
used at NLM]

Pathology

QZ 45

2015

Developmental defects

Various numbers

QZ 55

2020 Summer Edition

Trauma (Physical)

WO 700

QZ 57

2014

Physical agents

Various numbers

QZ 65

2019 summer edition

Bacteria. Fungi. Viruses (General) [Pathogenicity]

With topic in QW

QZ 85

2019 summer edition

Animal parasites [Pathogenicity]

QX 199-735

QZ 109

2016

Vitamin deficiencies

QZ 105

QZ 190

2016

Local disorders of growth

n/a

QZ 320

1978

Tumors derived from developmental
faults

QZ 310

QZ 330

1978

Tumors derived from neural elements

QZ 310

QZ 350

2016

Leukemia. Lymphoma. Hematologic neoplasms

WH 250; WH 525

General Medicine. Health Professions

W 39

1994

Handbooks [Health Professions]

W 49

W 94

2002

Government services

[Number not
used at NLM]

W 780

2020 Winter Edition

Examination of the living

W 775

W 822

2020 Winter Edition

Destruction and attempted destruction of the human body

W 800-867

Practice of Medicine

WB 107

2020 Summer Edition

Wilderness medicine

WD 680

WB 116

2020 Summer Edition

Military medicine 

WB 900-939

WB 289

1994

Diagnostic use of ultrasonics

WN 208

WB 375

1978

Thoracentesis. Pericardial puncture

[Number never
used at NLM]

Communicable Diseases

WC 169

1978

Gummatous lesions

WC 165

WC 405

1978

Rat-bite fever (Sodoku)

WC 390

WC 525

1978

Psittacosis [Ornithosis]

WC 660

WC 593

2007

Cat-scratch disease

WC 640

WC 825

1978

Cestode infections

WC 830

Medicine in Selected Environments

WD 100

2020 Summer Edition

[Nutrition Disorders] General works

QU 242

WD 101

2020 Summer Edition

[Nutrition Disorders] Resource guides

QU 39

WD 105

2020 Summer Edition

Deficiency diseases (General or not elsewhere classified)

QU 246

WD 110

2020 Summer Edition

Vitamin A deficiency

QU 167

WD 120

2020 Summer Edition

Vitamin B deficiency

QU 187-194

WD 122

2020 Summer Edition

Thiamine deficiency

QU 189

WD 124

2020 Summer Edition

Riboflavin deficiency

QU 191

WD 126

2020 Summer Edition

Pellagra

QU 187

WD 140

2020 Summer Edition

Ascorbic acid deficiency (e.g., Scurvy

QU 210

WD 145

2020 Summer Edition

Vitamin D deficiency

QU 173

WD 150

2020 Summer Edition

Vitamin E deficiency

QU 179

WD 155

2020 Summer Edition

Vitamin K deficiency

QU 181

WD 175

2020 Summer Edition

Celiac disease. Sprue

WI 471

WD 200

2020 Summer Edition

General works

QU 260

WD 200.1

2020 Summer Edition

Handbooks. Resource guides

QU 39

WD 200.5

2020 Summer Edition

Specific diseases or groups of diseases not classified elsewhere, A-Z

QU 260.5

WD 200.5.C2

2020 Summer Edition

Calcium metabolism disorders

QU 260.5.C2

WD 200.5.G6

2020 Summer Edition

Glucose metabolism disorders 

QU 260.5.G6

WD 200.5.H5

2020 Summer Edition

Hyperammonemia

QU 260

WD 200.5.H8

2020 Summer Edition

Lipid metabolism disorders

QU 260.5.L5

WD 200.5.H9

2020 Summer Edition

Hyperprolactinemia

WK 550

WD 200.5.I7

2020 Summer Edition

Iron metabolism disorders

QU 260.5.I7

WD 200.5.M2

2020 Summer Edition

Malabsorption syndromes

WI 470

WD 200.5.M6

2020 Summer Edition

Mitochondrial diseases

QU 260.5.M6

WD 200.5.P4

2020 Summer Edition

Phosphorus metabolism disorders

QU 260.5.P4

WD 200.5.P7

2017 summer edition

Protein-losing enteropathies

WI 418

WD 205

2020 Summer Edition

Inborn errors of metabolism (General)

QU 265

WD 205.5

2020 Summer Edition

Specific errors or groups of errors not elsewhere classified, A-Z

QU 265.5

WD 205.5.A5

2020 Summer Edition

Amino acid metabolism

QU 265.5.A5

WD 205.5.A6

2020 Summer Edition

Amyloidosis

QU 260.5.A5

WD 205.5.C2

2020 Summer Edition

Carbohydrate metabolism

QU 265.5.C3

WD 205.5.H9

2020 Summer Edition

Hyperbilirubinemia, Hereditary

QU 265

WD 205.5.L5

2020 Summer Edition

Lipid metabolism

QU 265.5.L5

WD 205.5.M3

2020 Summer Edition

Metal metabolism (General)

QU 265

WD 205.5.M4

2020 Summer Edition

Minerals

QU 265

WD 205.5.P2

2020 Summer Edition

Paralyses, Familial periodic

QU 265

WD 205.5.P6

2020 Summer Edition

Porphyrias

QU 260.5.P6

WD 205.5.P8

2020 Summer Edition

Purine-pyrimidine metabolism

QU 265.5.P8

WD 205.5.X2

2020 Summer Edition

Xanthomatosis

QU 260.5.L5

WD 210

2020 Summer Edition

Overweight. Obesity

QU 248

WD 212

2020 Summer Edition

Popular works

With particular topic

WD 214

2020 Summer Edition

Adiposis dolorosa. Lipomatosis. Lipodystrophy

QU 260.5.L5

WD 220

2020 Summer Edition

Water-electrolyte imbalance. Acid-base imbalance

QU 270-274

WD 222

2020 Summer Edition

Acidosis

QU 274

WD 226

2020 Summer Edition

Alkalosis

QU 274

WD 300

2019 summer edition

[Immunologic and Collagen Diseases. Hypersensitivity] General works

QW 740; QW 900

WD 301

2019 summer edition

[Immunologic and Collagen Diseases. Hypersensitivity] Handbooks. Resource guides

With topic in form number 39

WD 305

2019 summer edition

Autoimmune diseases (General)

QW 545

WD 308

2019 summer edition

Immune complex disease. Immunologic deficiency syndromes (General or not elsewhere classified)

QW 608; QW 740

WD 310

2019 summer edition

Food hypersensitivity

QW 904

WD 320

2019 summer edition

Drug hypersensitivity

QW 906

WD 330

2019 summer edition

Serum sickness

QW 608

WD 375

2020 Summer Edition

Collagen diseases and other connective tissue diseases (General)

QZ 192

WD 380

2020 Summer Edition

Systemic lupus erythematosus

QZ 194

WD 400

2019 summer edition

[Animal poisons] General works

QW 630.5.V4

WD 401

2019 summer edition

[Animal poisons] Handbooks. Resource guides

With topic in form number 39

WD 405

2019 summer edition

Marine forms

QW 630.5.V4

WD 410

2019 summer edition

Reptiles

QW 630.5.V4

WD 420

2019 summer edition

Spiders. Scorpions. Centipedes. Leeches

QW 630.5.V4

WD 430

2019 summer edition

Insects

QW 630.5.V4

WD 500

2019 summer edition

[Plant poisons] General works

QV 762; WA 700

WD 501

2019 summer edition

[Plant poisons] Handbooks. Resource guides

With topic in form number 39

WD 505

2019 summer edition

Ergotism

WA 700

WD 515

2019 summer edition

Favism

WA 700

WD 520

2019 summer edition

Mushroom poisoning

WA 700

WD 530

2019 summer edition

Milk sickness

WA 700

WD 600

2020 Summer Edition

[Disorders and Injuries of Environmental Origin] General works

Various numbers

WD 601

2020 Summer Edition

Handbooks. Resource guides

None

WD 602

2020 Summer Edition

Electric injuries

WO 840

WD 605

2020 Summer Edition

Non-ionizing radiation injuries (General)

QT 162.U4

WD 610

2020 Summer Edition

Heat stress disorders

QT 150

WD 630

2020 Summer Edition

Motion sickness

QT 162.M6

WD 640

2020 Summer Edition

Vibration disorders (General) 

QT 162.V4

WD 650

2020 Summer Edition

High air pressure. Submarine medicine

WD 850

WD 655

2020 Summer Edition

Hypoxia

WD 800-860

WD 670

2020 Summer Edition

Hypothermia. Cold injury

QT 160; WO 705

WD 715

2020 Summer Edition

Hypoxia

WD 710

WD 745

2020 Summer Edition

Aviation dentistry

None

Respiratory System

WF 815

1978

Subdiaphragmatic abscess [Subphrenic
abscess]

WI 575

Cardiovascular System

WG 110

2015

Experimental studies

WG 20

WG 530

2014

Frostbite. Immersion foot

WD 670; WE 880

WG 595.I6

1994

Innominate artery

WG 595.B72

WG 625.I6

1994

Innominate vein

WG 625.B7

WH Hemic and Lymphatic Systems

WH 314

2020 Summer Edition

Purpura (General) 

WH 322

WH 315

2020 Summer Edition

Thrombocytopenic purpura

WH 322

WH 320

2020 Summer Edition

Non-thrombopenic purpuras 

WH 322

Digestive System

WI 113

2018 Summer Edition

[Digestive System] Popular works

With topic

WI 150

2017 Summer Edition

Functional disorders

WI 143

WI 704

2017 Summer Edition

Liver function in food metabolism

WI 702

WI 940

2017 Summer Edition

Umbilical region

WE 757

Endocrine System

WK 187

2004

Synthetic hormones

WK 150-190, etc.

WK 375

1978

Carotid body.

WL 102.9

WK 757

2004

Synthetic substitutes for cortical hormones

WK 755

Nervous System

WL 30

2011

Administration of services

Various numbers

Psychiatry

WM 58

1978

Psychiatric social work

WM 30.5

WM 145.5.C3

2011

Cattell personality factor questionnaire

WM 145.5.M6

WM 145.5.S9

2002

Szondi test

WM 145.5.P8

WM 145.5.R8

2005

Rosenzweig picture-frustration study

WM 145.5.P8

WM 190.5.I6

2017 Summer Edition

Impulse control disorders. Gambling. Fire setting behavior

WM 192

WM 202

2011

Functional

Not applicable

WM 210

1978

Personality disorders [Constitutional
psychopathic personality

WM 190

WM 612

1994

Masturbation

HQ 447;

WM 615

1994

Homosexuality

HQ 75-76.8;
WM 611

Radiology. Diagnostic Imaging

WN 300

2017 Summer Edition

General works [Radium]

WN 440, etc.

WN 340

2017 Summer Edition

Therapeutic use [Radium]

WN 440, etc.

WN 415

2017 Summer Edition

Biological aspects of nuclear medicine and atomic energy (General)

QC

WN 420

2017 Summer Edition

Radioisotopes. Radioactive elements

WN 440, etc.

WN 630

2017 Summer Edition

Injurious effects on plant life (related to human ecology)

QK 757

Surgery. Wounds and Injuries

WO 34

1981

Malpractice

WO 33;
WO 33.1

WO 75

2018 Summer Edition

[Surgery] Popular works (General)

With topic

WO 140

2020 Summer Edition

Surgical diseases (General)

WO 500

WO 198

 

2020 Summer Edition

Electrosurgery. Cautery. Laser and electrocoagulation (General)

WO 508; WO 504; WO 511

WO 250

2020 Summer Edition

Asphyxia. Methods of resuscitation 

WO 720; WB 106; WO 245

WO 290

2020 Summer Edition

Rectal

WO 275

WO 295

1978

Basal Anesthesia

WO 234

WO 297

 

2020 Summer Edition

Muscle relaxants and tranquilizing agents in conjunction with anesthesia and analgesia

QV 140; QV 77.9

WO 375

2020 Summer Edition

Diagnostic and therapeutic anesthetic procedures

WO 320; QV 81

WO 515

2020 Summer Edition

Regenerative medicine

QT 110

WO 640

2020 Summer Edition

Prosthesis in plastic surgery

WO 162

Gynecology

WP 175

1978

Urethrocele. Cytocele. Rectocele

WP 180;
WP 250

WP 930

1978

Radiation [Breast. Therapy]

WP 870

Obstetrics

WQ 410

1978

Preparation manipulation [Obstetrical
Surgery]

WQ 415

WQ 435

2002

Embryotomy

WQ 440

Pediatrics

WS 105.5.H2

2018 Summer Edition

Disabled child (Psychological problems)

WS 106-107

WS 107.5.B4

2018 Summer Edition

Biochemistry. Genetics

WS 107

WS 107.5.F6

2018 Summer Edition

Foster home care

WS 105.5.A8

WS 107.5.I4

2018 Summer Edition

Institutionalization

WS 105.5.H7

WS 350.8.D2

2018 Summer Edition

Deception

WS 105.5.S6

WS 350.8.I3

2018 Summer Edition

Identity Crisis

WS 350.8.P3

WS 360

2018 Summer Edition

Pediatric gynecology (General)

WS 320-321

Dentistry. Oral Surgery

WU 39

1994

Handbooks [Dentistry]

WU 49

Otolaryngology

WV 324

1978

Nasal fossae. Turbinates

WV 301

Hospital and other Health Facilities

WX 221

1978

X-ray services [Radiology Department,
Hospital]

WN 27-28

Ophthalmology

WW 113

2014

Hygiene. Eye protective devices

WW 26

Nursing

WY 39

1994

Handbooks [Nursing]

WY 49

WY 300

2010

Nursing by country (Table G)

WY 100

History of Medicine. Medical Miscellany

WZ 29

1994

Handbooks [History of Medicine]

WZ 39

WZ 332

2009

Anniversaries and special events

[Number never
used at NLM]

19th Century Schedule Class Numbers Canceled

Canceled Number

Year

Class Name

Now Classed in

WBM

2020 summer edition

Military medicine

WDE

WBN

2020 summer edition

Naval medicine

WDF

WDA

2020 Summer edition

Deficiency diseases. Metabolic diseases 

QUA

WDB

2019 summer edition

Hypersensitivity

QWA

WDC

2019 summer edition

Animal poisons. Plant poisons

QWB; QVB