Classification 2025 Summer Edition
Worldwide source of medical classification resources×
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.
Class Index
...
...
See also Sexually Transmitted Diseases
See Arenaviridae
Diseases
SF 997.5.R4
Scientific
Q 179.9 - Q 180.6
(Form number 20 or 20.5 in any NLM schedule where applicable)
Fields outside the NLM area, in appropriate LC number
See also Ethics, Research
See also Information Services
See also Systems Analysis
See also Biomedical Research
See also Dental Research
See also Nursing Research
Science
Q 180.A1
(Form number 20-20.5 in any NLM schedule where applicable)
See also Epidemiologic Research Design
Medical
Scientific (General)
Q 149.A-Z
Directories
Q 145
See also names of fields in which research is done
General
Special topics by subject
(Form number 20 or 20.5 in any NLM schedule where applicable)
See also Human Experimentation
Science
Q 180 - Q 180.5
(Form number 20-20.5 in any NLM schedule where applicable)