Classification-Index

Classification 2025 Summer Edition

Worldwide source of medical classification resources

Class Index

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Out-of-Pocket Spending See Health Expenditures

Out-patients See Outpatients

Outbreaks See Disease Outbreaks

Outcome and Process Assessment See Outcome and Process Assessment, Health Care

Outcome and Process Assessment (Health Care) See Outcome and Process Assessment, Health Care

Outcome and Process Assessment, Health Care W 84.4

Of particular treatments, by subject

Outcome, Pregnancy See Pregnancy Outcome

Outcomes, Pregnancy See Pregnancy Outcome

Outer Ear See Ear, External

Outer Membrane Lipoproteins, Bacterial See Bacterial Outer Membrane Proteins

Outer Membrane Proteins, Bacterial See Bacterial Outer Membrane Proteins

Outlet Impingement See Shoulder Impingement Syndrome

Outlet Impingement Syndrome See Shoulder Impingement Syndrome

Outline

Anesthesiology

WO 218.2

Embryology

QS 618.2

Forensic medicine and dentistry

W 618.2

Histology

QS 518.2

Immunology

QW 518.2

Military medicine

WD 918.2

Naval medicine

WD 818.2

(Form number 18.2 in any NLM schedule where applicable)

Outlines See Outline

Outpatient Care See Ambulatory Care

Outpatient Clinic See Ambulatory Care Facilities

Outpatient Clinics See Ambulatory Care Facilities

Outpatient Clinics, Hospital WX 205

Specialty hospitals (Form numbers 27-28 in any NLM schedule where applicable)

See also Ambulatory Care

Outpatient Commitment See Commitment of Persons with Psychiatric Disorders

Outpatient Health Services See Ambulatory Care

Outpatient Services See Ambulatory Care

Outpatient Surgery See Ambulatory Surgical Procedures

Outpatients WX 205

Patient with a particular disease, with the disease

See also Ambulatory Care

Outsourced Services

In medicine (General)

W 74

Other specific topics, by subject, in economics number where available

See also Contract Services

Outsourcing See Outsourced Services

Ova See Ovum

Ovalbumin QU 55.4

Ovarian Cancer See Ovarian Neoplasms

Ovarian Carcinoma See Ovarian Neoplasms

Ovarian Cycle See Menstrual Cycle

Ovarian Cysts WP 322

Ovarian Diseases WP 320

Ovarian Follicle WP 320

See also Ovum

Ovarian Follicles See Ovarian Follicle

Ovarian Function Tests WP 540

Ovarian Inhibin See Inhibins

Ovarian Neoplasms WP 322

Ovarian Stimulation See Ovulation Induction

Ovariectomy WP 320

Ovaries See Ovary

Ovary

General

WP 320

Ovarian function

WP 540

See also Ovariectomy

See also Corpus Luteum

See also Oophoritis

See also Ovarian Follicle

Ovary Cancer See Ovarian Neoplasms

Ovary Neoplasms See Ovarian Neoplasms

Over Medicalization See Medicalization

Over Pathologization See Medicalization

Over Prescribing See Inappropriate Prescribing

Over-Medicalization See Medicalization

Over-Pathologization See Medicalization

Over-the-Counter Drug See Nonprescription Drugs