291900000X
Clinical Medical Laboratory Taxonomy Code 291U00000X
291U00000X
Level II - Classification
22,760Registered providers
69Medicare specialty
26.0NUCC version
56States & territories
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.
Code Details for 291U00000X
About Taxonomy Code 291U00000X
The taxonomy code 291U00000X identifies Clinical Medical Laboratory within the Laboratories provider grouping. It is a Level II — Classification code, which names a provider's occupation or service within the broader provider grouping.
NPI records show 22,760 registered providers whose primary or secondary taxonomy is this code. Of these, 21,886 (96%) are registered as organizations and 874 (4%) as individual providers. The states with the most clinical medical laboratory providers are Texas (3,155), California (2,227), Florida (1,587). For Medicare enrollment, it crosswalks to specialty code 69 (Clinical Laboratory).
Taxonomy codes are self-selected by the provider based on their education and training; they describe the provider's type and specialty, not the specific services rendered.
Provider Composition & Statistics
22,760Total providers
21,886Organizations 96%
874Individuals 4%
579Female
295Male
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-08-09T00:00:00.
View all 22,760 providersClinical Medical Laboratory Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
All states (nationwide)
22,760
Alabama295Alaska29American Samoa1Arizona494Arkansas135California2,227Colorado515Connecticut155Delaware31District Of Columbia31Florida1,587Georgia703Guam1Hawaii69Idaho99Illinois1,224Indiana322Iowa111Kansas188Kentucky419Louisiana341Maine34Mariana Islands2Maryland529Massachusetts282Michigan503Minnesota182Mississippi221Missouri339Montana58Nebraska88Nevada160New Hampshire50New Jersey408New Mexico83New York496North Carolina803North Dakota61Ohio614Oklahoma234Oregon202Pennsylvania531Puerto Rico1,533Rhode Island24South Carolina248South Dakota47Tennessee328Texas3,155Utah143Vermont26Virgin Islands14Virginia444Washington458West Virginia281Wisconsin254Wyoming72
Frequently Asked Questions
291U00000X questionsNPPES lists 22,760 registered providers with this taxonomy code (Clinical Medical Laboratory).
Both. About 96% of these providers are registered as organizations and 4% as individuals.
It crosswalks to Medicare specialty code 69 (Clinical Laboratory).
It is a Level II - Classification code in the NUCC Health Care Provider Taxonomy set.
Use the "Providers by state" directory on this page to open the list of clinical medical laboratory providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 26.0. Provider counts from NPPES. See nucc.org.
