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NLM Classification 2020: Worldwide source of medical library classification



Classify here works on specific mental disorders of childhood, adolescence, or old age unless specifically instructed to do otherwise.

  • Classify material on forensic psychiatry in W 740.
  • Classify general works on child psychiatry in WS 350.
  • Classify general works on adolescent psychiatry in WS 463.
  • Classify general works on geriatric psychiatry in WT 150.
  • Classify works on psychiatric nursing in general and on specific psychiatric diseases in WY 160.


  WM 1-110 Reference Works. General Works
  WM 140-197 Mental Disorders. Behavioral Symptoms
  WM 200-220 Schizophrenia Spectrum and Other Psychotic Disorders
  WM 270-295 Substance-Related Disorders and Behaviors
  WM 300-308 Intellectual Disability
  WM 400-460.7 Therapies
  WM 475-605 Other Disorders
  WM 607-611 Sexual Dysfunctions
  WM 617-620.5 Gender Identity. Sexual Behavior

Reference Works. General Works

WM 1
Organizations. Societies (General or not elsewhere classified) (Cutter from name of organization or society) (Table G)
(Used for both monographs and serials)
Includes membership lists issued serially or separately. Classify directories in WM 22. Classify annual reports, journals, etc., in W1. For academies and institutes, see WM 23-24.
WM 5
Collected works by several authors
WM 7
Collected works by individual authors
WM 9
Addresses. Essays. Lectures
WM 11
History (Table G)
WM 11.1
General coverage (Not Table G)
WM 13
Dictionaries. Encyclopedias
(Used for both monographs and serials)
WM 15
Classification. Terminology
(Used for both monographs and serials)
WM 16
Tables. Statistics. Surveys (Table G)
(Used for both monographs and serials)
WM 16.1
General coverage (Not Table G)
(Used for both monographs and serials)
WM 17
Atlases. Pictorial works
WM 18
Classify here works about education.
WM 18.2
Educational materials
(Used for both monographs and serials)
Classify here educational materials, e.g., outlines, questions and answers, programmed instruction, computer-assisted instruction, etc., regardless of format. Classify textbooks, regardless of format, by subject.
WM 19
Schools, departments, and faculties of psychiatry (Table G)
(Used for both monographs and serials)
Include here works on the history of schools. Classify courses of study, catalogs, etc., in W 19.5.
WM 19.1
General coverage (Not Table G)
(Used for both monographs and serials)
WM 19.5
Graduate and continuing education in psychiatry (including fellowships, internships, residencies, etc.)
WM 20
Research (General)
Classify here works about research in general. Classify works about research on a particular subject by subject.
WM 21
Mental health careers and professions. Types of practice. Peer review. Ethics
Classify works for and about psychiatric aides in WY 160.
WM 21.5
Allied health personnel. Allied health occupations
WM 22
Directories (Table G)
(Used for both monographs and serials)
WM 22.1
General coverage (Not Table G)
(Used for both monographs and serials)
WM 23
Collective laboratories, academies, institutes, etc.
WM 24
Individual laboratories, academies, institutes, etc. (Cutter form name of institution)
WM 25
Experimental psychiatric techniques
WM 26
Equipment and supplies
Classify catalogs in W 26.
WM 26.5
Informatics. Electronic data processing. Computers (General)
Classify works on use for special subject by subject.
WM 27
Collective hospitals, clinics, dispensaries, etc. (Table G)
Classify works limited to psychiatric hospitals for children in WS 27-28.
WM 27.1
General coverage (Not Table G)
WM 28
Individual hospitals, clinics, dispensaries, etc. (Cutter from name of hospital) (Table G)
WM 28.5
Collective museums, exhibitions, etc.
WM 28.6
Individual museums, exhibitions, etc. (Cutter from name of museum, etc.) (Table G)
WM 29
Community mental health centers. Rehabilitation centers. Treatment facilities and programs, etc. (Table G)
WM 29.1
General coverage (Not Table G)
WM 29.5
Patients. Attitude and compliance. Satisfaction
WM 30
Mental health services (Table G)
Cf. WM 401 for general works on crisis intervention; WA 305 for special population groups.
WM 30.1
General coverage (Not Table G)
WM 30.2
Administration of services and health personnel
WM 30.5
Psychiatric social work
WM 30.6
Community psychiatry. Community mental health services (General) (Table G)
WM 30.61
General coverage (Not Table G)
WM 31
Socioeconomic and environmental factors in mental illness
WM 31.5
Preventive measures in psychiatry
WM 32
Laws (Table G)
(Used for both monographs and serials)
(e.g., Commitment)
Cf. W 740 Forensic psychiatry.
WM 32.1
General coverage (Not Table G)
(Used for both monographs and serials)
Include international law.
WM 33
Discussion of law (Table G)
(Used for both monographs and serials)
WM 33.1
General coverage (Not Table G)
(Used for both monographs and serials)
WM 34
Handbooks. Resource guides
(Used for both monographs and serials)
WM 35
Practices in the care of the mentally ill
Classify here works on ward attendance, restraints, and techniques in home care, etc. Cf. WY 160 Psychiatric nursing.
WM 40
Case reports (General)
Classify here case books, biographies, and autobiographies of the mentally ill. Classify case histories limited to one disease with the disease. Classify biographies of mentally ill health professionals in WZ 100. Classify works on famous persons in WZ 313. Classify symbolic case reports in WM 49.
WM 49
Art and literature as related to psychiatry. Symbolic case reports
(e.g., Electra, Hamlet, Oedipus, Don Juan, etc.)
WM 55
Psychological counseling
[WM 58]
[This number not used]
Classify psychiatry social work in WM 30.5.
WM 61
Pastoral care
WM 62
Interpersonal relations of mental health professionals. Attitude
Classify here works on relations with patients and other professionals.
WM 64
Referral and consultation (General)
WM 75
Popular works (General)
Classify here works on mental health or mental disorders in general. Classify works on specific disorders with the disorder.
WM 90
Psychophysiologic disorders. Psychosomatic medicine (General)
Classify here works on the profession. Classify general works on psychophysiologic sex disorders in WM 611.
WM 100
General works
Classify works on specialty and on the specialty and diseases here. Classify works on diseases alone in WM 140.
WM 101
Mental health (General)
Classify popular works in WM 75. Classify works on the mental health of special population groups in WA 305.
WM 102
Biological psychiatry. Neuropsychiatry
WM 105
Clinical psychology
Classify works on counseling in WM 55.
WM 110
Military psychiatry

Mental Disorders. Behavioral Symptoms

WM 140
Mental disorders. Behavioral symptoms (General)
Classify here works on behavioral symptoms for which there are no classification numbers for related disorders. Classify specific symptoms with related disorders, e.g., Anxiety with anxiety disorders; Depression with depressive disorder. Classify general works on mental disorders of special population groups in WA 305.
WM 141
Psychiatric examination. Diagnosis
WM 143
Psychological interview
WM 145
Psychological tests (General or not elsewhere classified)
Classify works on intelligence tests in BF 431-432.5.
WM 145.5
Specific tests, A-Z
WM 145.5.B4
Bender-Gestalt test
[WM 145.5.C3]
[This number not used]
Classify works on Cattell personality factor questionnaire in WM 145.5.M6.
WM 145.5.I5
Ink blot tests
WM 145.5.M6
Personality inventory
WM 145.5.N4
Neuropsychological tests
WM 145.5.P8
Projective techniques
WM 145.5.R7
Rorschach test
[WM 145.5.R8]
[This number not used]
Classify Rosenzweig picture-frustration study in WM 145.5.P8
[WM 145.5.S9]
[This number not used]
Classify Szondi test in WM 145.5.P8
WM 145.5.T3
Thematic apperception test
WM 145.5.W9
Word association tests
WM 165
Self-injurious behavior. Dangerous behavior
WM 167
Psychological aspects of survivors and survivorship
Classify specific symptoms with related disorders, e.g., Post-traumatic stress with post-traumatic stress disorders in WM 172.5; Depression with depressive disorder in WM 171.5. Classify works on HIV survivors in WC 503.7. Classify works on cancer survivors in QZ 260. Classify works on atomic bomb survivors in WN 610.
WM 168
Neurodevelopmental disorders (General or not elsewhere classified)
Classify works on children only in WS 350.7. Classify works on autistic disorders in adults in WM 203.5
WM 169
Attention deficit and disruptive behavior disorders
Classify works on children only in WS 350.8.A8.
WM 170
Neurotic disorders
WM 171
Affective symptoms. Mood disorders
WM 171.5
Depression. Depressive disorder
WM 171.7
Bipolar disorder
WM 172
Anxiety. Anxiety disorders (General or not elsewhere classified)
WM 172.4
Psychological stress
WM 172.5
Stress disorders
Classify works on combat disorders in WM 184.
WM 173
WM 173.5
Somatoform disorders (General or not elsewhere classified)
WM 173.6
Dissociative disorders
WM 173.7
Amnesia and other memory disorders
WM 174
Neurasthenia. Mental fatigue
WM 175
Feeding and eating disorders
Classify here eating disorders regardless of age group. Classify works on nutrition disorders of children in WS 115-132.
WM 176
Obsessive-compulsive disorder. Compulsive behavior. Obsessive behavior
WM 178
Phobic disorders. Hypochondriasis. Sick role. Factitious disorders
Classify works on sick role associated with a particular disease with the disease.
WM 184
Combat disorders
WM 188
Sleep disorders and associated conditions
Classify here material on the psychological aspects of sleep disorders. Include popular works. Cf. WL 108 Physiology of sleep and sleep disorders.
WM 190
Personality disorders (General or not elsewhere classified)
WM 190.5
Special topics, A-Z
WM 190.5.A2
Antisocial personality disorder
WM 190.5.B5
Borderline personality disorder
WM 190.5.C5
Compulsive personality disorder
WM 190.5.D3
Dependent personality disorder. Codependency
[WM 190.5.I6]
[This number not used]
Classify works on disruptive, impulse control, and conduct disorders in WM 192.
WM 190.5.P2
Paranoid personality disorder
WM 190.5.P3
Passive-aggressive personality disorder
WM 190.5.S3
Schizoid personality disorder
WM 190.5.S4
Schizotypal personality disorder
WM 190.5.S8
Stereotyped behavior
WM 192
Disruptive, impulse control, and conduct disorders
WM 193
Defense mechanisms
Classify works on defense mechanisms in children in WS 350.8.D3.
WM 193.5
Special topics, A-Z
WM 193.5.A2
Acting out
WM 193.5.D3
WM 193.5.D5
WM 193.5.P3
Perceptual defense
WM 193.5.P7
WM 193.5.R1
WM 193.5.R2
WM 193.5.R4
WM 193.5.S8
Sublimation. Fantasy
WM 197
Psychomotor disorders (General or not elsewhere classified)
Classify the neurological aspects of psychomotor disorders in WL 390.

Schizophrenia Spectrum and Other Psychotic Disorders

WM 200
Psychotic disorders (General or not elsewhere classified)
[WM 202]
[This number not used]
WM 203
WM 203.5
Pervasive child development disorders
Classify here works on the adult alone. Classify works dealing with autistic disorder in both children and adults or in children alone at WS 350.8.P4.
WM 204
Neurocognitive disorders. Perceptual disorders
WM 205
Paranoid disorders
WM 207
Psychotic affective disorders
Classify works on affective symptoms in WM 171.
[WM 210]
[This number not used]
Classify works on antisocial personality in WM 190.5.A2.
WM 220
Classify works on Alzheimer disease in WT 155.

Substance-Related Disorders and Behaviors

WM 270
Substance-related disorders (General or not elsewhere classified)
WM 273
Alcohol drinking
Classify works on social and cultural aspects of alcohol drinking in HV 5006-5722. Classify works on traffic accidents associated with alcohol consumption in WA 275.
WM 274
Alcohol-related disorders (General or not elsewhere classified)
WM 275
Amphetamine-related disorders
WM 276
Marijuana use. Marijuana abuse
Classify works on use of medical marijuana in WB 925. Classify works on legalization of marijuana in QV 732-733.
WM 280
Cocaine-related disorders
WM 282
Narcotic-related disorders
WM 284
Opioid-related disorders
WM 286
Opium dependence. Morphine dependence
WM 288
Heroin dependence
WM 290
Tobacco use. Tobacco use disorder
WM 295
Smoking (General or not elsewhere classified)

Intellectual Disability

WM 300
Intellectual disability
Classify works on intellectual disability of children in WS 107-107.5. Classify works on education of intellectually disabled children in LC 4601-4640.4. Classify works on education of intellectually disabled adults in LC 4815-4815.5.
WM 302
Case studies. Biographical accounts
WM 304
Diagnosis. Evaluation. Prognosis
WM 307
Special issues, A-Z
WM 307.C6
WM 307.M5
Mental disorders
WM 307.S3
Sexual behavior
WM 307.S6
Social problems (General)
WM 308
Rehabilitation and training (General)


WM 400
Therapy of mental disorders (General or not elsewhere classified)
Cf. WL 370 Psychosurgery.
WM 401
Emergency psychiatric services. Crisis intervention
Classify here works on interventions for victims of rape and other crimes. Classify works on community mental health programs in WM 30.
WM 402
Drug therapy
WM 405
Physical therapy (General or not elsewhere classified)
(e.g., Induced hyperthermia)
WM 410
Convulsive therapy. Insulin shock therapy
WM 412
Electroconvulsive therapy. Electronarcosis
WM 415
WM 420
Psychotherapy (General or not elsewhere classified)
Classify works on psychotherapy in childhood in WS 350.2, in adolescence in WS 466, and in old age in WT 150.
WM 420.5
Special types, A-Z
WM 420.5.A2
Abreaction. Catharsis
WM 420.5.E3
Emotion-focused therapy
WM 420.5.G3
Gestalt therapy
WM 420.5.I3
WM 420.5.I4
Interpersonal psychotherapy
WM 420.5.N3
Narrative therapy
WM 420.5.N4
Neurolinguistic programming
WM 420.5.N8
Person-centered psychotherapy
WM 420.5.P3
Personal construct therapy
WM 420.5.P5
Psychotherapy, Brief
WM 420.5.P7
Psychotherapy, Multiple
WM 420.5.P75
Psychotherapy, Psychodynamic
WM 420.5.P8
Psychotherapy, Rational-Emotive
WM 425
Behavior therapy
WM 425.5
Special types, A-Z
WM 425.5.A5
Anger management therapy
WM 425.5.A7
Applied behavior analysis
WM 425.5.A9
Aversive therapy
WM 425.5.B6
Biofeedback (Psychology)
Classify general works on biofeedback in WL 103.3.
WM 425.5.C6
Cognitive behavioral therapy
WM 425.5.D4
Psychologic desensitization. Implosive therapy
WM 425.5.R3
Relaxation therapy
WM 426
Self-help groups
WM 427
Spiritual and religious therapy
Cf. WB 885 for general works.
WM 428
Socioenvironmental therapy
WM 430
Group psychotherapy
WM 430.5
Special types, A-Z
WM 430.5.F2
Family therapy
WM 430.5.H2
WM 430.5.M3
Marital therapy
WM 430.5.P8
WM 430.5.S3
Sensitivity training groups. Encounter groups
Cf. HM 1086 for general sociological works.
WM 440
Milieu therapy. Therapeutic community
WM 445
Residential treatment (General)
WM 450
Activity therapy. Sensory art therapies
WM 450.5
Special types, A-Z
WM 450.5.A6
Animal assisted therapy
WM 450.5.A8
Art therapy
WM 450.5.B5
WM 450.5.D2
Dance therapy
WM 450.5.M8
Music therapy
WM 450.5.O2
Occupational therapy
WM 450.5.P5
WM 450.5.P7
Play therapy
Cf. WS 350.4 for play therapy with children.
WM 450.5.R4
Recreation therapy
Classify general works on recreation therapy in WB 556.
WM 450.5.V5
WM 450.5.V6
Virtual reality exposure therapy
WM 450.5.W9
WM 460
WM 460.2
Psychoanalytic theory (General or not elsewhere classified)
WM 460.5
Special topics associated with psychoanalysis, psychoanalytic theory, therapy or interpretation, A-Z
WM 460.5.B7
Bonding, Human-Pet
WM 460.5.C5
WM 460.5.C7
WM 460.5.D8
Dreams. Symbolism
WM 460.5.E3
Ego. Self
WM 460.5.E8
Existentialism. Logotherapy
WM 460.5.E9
Extraversion. Introversion
WM 460.5.F8
Free association
WM 460.5.F9
Freudian theory
WM 460.5.I4
WM 460.5.I5
WM 460.5.J9
Jungian theory
WM 460.5.L2
WM 460.5.M5
WM 460.5.M6
WM 460.5.O2
Object attachment
WM 460.5.P3
WM 460.5.P5
Pleasure-pain principle
WM 460.5.P7
Political systems
WM 460.5.R2
WM 460.5.R3
Religion. Church
WM 460.5.S3
WM 460.5.S8
Superego. Morals
WM 460.5.T7
Transactional analysis
WM 460.5.U6
Unconscious. Id
WM 460.5.W6
WM 460.6
Psychoanalytic therapy
WM 460.7
Psychoanalytic interpretation

Other Disorders

WM 475
Communication disorders. Speech-language pathology
Classify works on communication disorders of neurologic origins in WL 340.2.
WM 475.3
Speech therapy. Language therapy
Cf. WL 340.3 for therapy of disorders of neurologic origin.
WM 475.5
Classify works on aphasia of neurologic origin in WL 340.5.
WM 475.6
Classify works on dyslexia of neurologic origin in WL 340.6.
WM 475.7
WM 600
Aggression. Violence
Cf. WS 350.8.A4 for works about children; cf. WS 470.A4 for works about adolescents.
WM 605
Criminal psychology and psychiatry

Sexual Dysfunctions

WM 607
WM 610
Paraphilic disorders
WM 611
Psychological sexual dysfunctions (General or not elsewhere classified)
Cf. WJ 712 Disorders of sex development; WJ 709 Male physiological sexual dysfunction; WP 610 Female physiological sexual dysfunction.
[WM 612]
[This number not used]
Classify masturbation in WM 620.
[WM 615]
[This number not used]
Classify homosexuality in WM 620.5.H6.

Gender Identity. Sexual Behavior

WM 617
Gender identity. Transsexualism. Transgender persons
WM 620
Sexual behavior. Sexual health (General or not elsewhere classified)
Cf. WS 105.5.S4 Child; WS 462.5.S4 Adolescent
WM 620.5
Specific topics, A-Z
WM 620.5.B5
Bisexuality. Bisexual persons
WM 620.5.H4
Heterosexuality. Heterosexual persons
WM 620.5.H6
Homosexuality. Homosexual persons