291900000X
Physiological Laboratory Taxonomy Code 293D00000X
293D00000X
Level II - Classification
2,267Registered providers
47Medicare specialty
25.1NUCC version
52States & territories
Definition
A laboratory that operates independently of a hospital and physician's office to furnish physiological diagnostic services (e.g. EEG's , EKG's, scans, etc.). Facilities offering ONLY physiological services are not certified as independent laboratories. If an independent laboratory offers physiological services IN ADDITION to clinical laboratory services, they are surveyed only for compliance with the clinical laboratory regulations because there are no health and safety regulations for physiological services.
Code Details for 293D00000X
About Taxonomy Code 293D00000X
The taxonomy code 293D00000X identifies Physiological 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 2,267 registered providers whose primary or secondary taxonomy is this code. Of these, 2,228 (98%) are registered as organizations and 39 (2%) as individual providers. The states with the most physiological laboratory providers are Texas (476), California (296), Florida (189). For Medicare enrollment, it crosswalks to specialty code 47 (Independent Diagnostic Testing Facility (IDTF)).
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
2,267Total providers
2,228Organizations 98%
39Individuals 2%
14Female
25Male
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-06-21T00:00:00.
View all 2,267 providersPhysiological Laboratory Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
All states (nationwide)
2,267
Alabama30Arizona46Arkansas20California296Colorado53Connecticut12Delaware1District Of Columbia5Florida189Georgia58Hawaii7Idaho10Illinois67Indiana38Iowa8Kansas10Kentucky21Louisiana38Maine18Mariana Islands1Maryland39Massachusetts29Michigan35Minnesota9Mississippi30Missouri32Montana5Nebraska3Nevada20New Hampshire3New Jersey64New Mexico13New York89North Carolina79North Dakota3Ohio47Oklahoma41Oregon20Pennsylvania44Puerto Rico30Rhode Island3South Carolina41South Dakota4Tennessee37Texas476Utah22Vermont1Virginia27Washington38West Virginia4Wisconsin13Wyoming6
Frequently Asked Questions
293D00000X questionsNPPES lists 2,267 registered providers with this taxonomy code (Physiological Laboratory).
Both. About 98% of these providers are registered as organizations and 2% as individuals.
It crosswalks to Medicare specialty code 47 (Independent Diagnostic Testing Facility (IDTF)).
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 physiological laboratory providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 25.1. Provider counts from NPPES. See nucc.org.
