Laboratories / 291900000X
Non-Individual · classification · Medicare specialty B4[14]
291900000X Military Clinical Medical Laboratory
291900000X is the taxonomy code for Military Clinical Medical 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 B4[14], Rural Health Clinic, under which 0 practitioners are enrolled.
- 1Taxonomy code 291900000X
- 2Level Classification
- 3Medicare specialty B4[14] Rural Health Clinic
- 4Codes in this group 4
Definition
A Department of Defense (DoD) medical clinical reference laboratory not associated with a DoD Hospital or DoD Clinic. An example is the Armed Forces Institute of Pathology.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 291900000X sits
- Group: Laboratories — code 3 of 4 in the group
- Classification: Military Clinical Medical Laboratory 291900000X
Military Clinical Medical Laboratory has no specializations, so 291900000X 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 291900000X to Medicare specialty B4[14] (Rural Health Clinic). 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 Military Clinical Medical Laboratory. The rest of Laboratories is on the group page.
History of 291900000X
291900000X was added to the code set in 2005.
- 2005-01-01 — new
Similar codes in other groups
If 291900000X 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)
- 208U00000X Clinical Pharmacology Physician (Allopathic & Osteopathic Physicians)
- 207NI0002X Clinical & Laboratory Dermatological Immunology Physician (Allopathic & Osteopathic Physicians)
- 207PE0004X Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians)
- 207PT0002X Medical Toxicology (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians)
- 202C00000X Independent Medical Examiner Physician (Allopathic & Osteopathic Physicians)
Find providers with 291900000X
Using 291900000X
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.