Physiological Laboratory: NPI taxonomy code 293D00000X
Taxonomy code 293D00000X is Physiological Laboratory, in the Laboratories group.
1,890 active NPIs list it as their primary specialty (<0.1% of all).
| Code | 293D00000X |
|---|---|
| Group | Laboratories |
| Classification | Physiological Laboratory |
| Used for | organizations (the code is in NUCC's Non-Individual section) |
| Active NPIs, primary specialty | 1,890 (22 individuals, 1,868 organizations) |
What NUCC says: 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. (excerpt of the NUCC 26.1 definition)
Find Physiological Laboratory providers
Search the registry for providers listing Physiological Laboratory. Pick a state to narrow it down.
Where they are
| State | Active NPIs | Share |
|---|---|---|
| Texas | 383 | 20.3% |
| California | 268 | 14.2% |
| Florida | 152 | 8.0% |
| New York | 79 | 4.2% |
| New Jersey | 61 | 3.2% |
| Illinois | 53 | 2.8% |
| Ohio | 47 | 2.5% |
| Colorado | 47 | 2.5% |
| Georgia | 43 | 2.3% |
| Arizona | 41 | 2.2% |
Top states by practice location, from the NPPES file of September 13, 2026.
Specialty definitions are from the NUCC Health Care Provider Taxonomy (version 26.1). Which code to use on a claim depends on your NPPES record and your payer. See taxonomy codes explained.