291U00000X — Clinical Medical Laboratory
291U00000X is the NUCC provider taxonomy code for Clinical Medical Laboratory (organizations). 18,553 providers in our latest NPPES snapshot list it as their primary taxonomy.
| Taxonomy code | 291U00000X |
|---|---|
| Display name | Clinical Medical Laboratory |
| Grouping | Laboratories |
| Classification | Clinical Medical Laboratory |
| Section | Non-Individual |
| Directory | Clinical Medical Laboratory provider directory |
Definition
(1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology.
Definition from the NUCC Health Care Provider Taxonomy code set.
Related taxonomy codes
Frequently asked questions
What does taxonomy code 291U00000X mean?
Where is the taxonomy code used?
How do I find providers with taxonomy 291U00000X?
Source: CMS NPPES (public data). Snapshot 2026-07-09.