Laboratories / 293D00000X
Non-Individual · classification · Medicare specialty 47
293D00000X Physiological Laboratory
293D00000X is the taxonomy code for Physiological Laboratory, in the NUCC group “Laboratories”. It is a code for organizations — the kind used on a Type 2 NPI. Medicare maps it to specialty 47, Independent Diagnostic Testing Facility (IDTF), under which 0 practitioners are enrolled.
- 1Taxonomy code 293D00000X
- 2Level Classification
- 3Medicare specialty 47 Independent Diagnostic Testing Facility (IDTF)
- 4Codes in this group 4
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.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 293D00000X sits
- Group: Laboratories — code 4 of 4 in the group
- Classification: Physiological Laboratory 293D00000X
Physiological Laboratory has no specializations, so 293D00000X is the only code for it. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 293D00000X to Medicare specialty 47 (Independent Diagnostic Testing Facility (IDTF)). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 0 practitioners are enrolled under it nationally.
Related codes
No other codes share the classification Physiological Laboratory. The rest of Laboratories is on the group page.
History of 293D00000X
NUCC's notes record no dated changes for 293D00000X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.
Similar codes in other groups
If 293D00000X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 207KI0005X Clinical & Laboratory Immunology (Allergy & Immunology) Physician (Allopathic & Osteopathic Physicians)
- 207NI0002X Clinical & Laboratory Dermatological Immunology Physician (Allopathic & Osteopathic Physicians)
- 207RI0001X Clinical & Laboratory Immunology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians)
- 207ZP0105X Clinical Pathology/Laboratory Medicine Physician (Allopathic & Osteopathic Physicians)
- 2080I0007X Pediatric Clinical & Laboratory Immunology Physician (Allopathic & Osteopathic Physicians)
- 126900000X Dental Laboratory Technician (Dental Providers)
Find providers with 293D00000X
Using 293D00000X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.