Suppliers / 335U00000X
Non-Individual · classification · Medicare specialty B4[14]
335U00000X Organ Procurement Organization
335U00000X is the taxonomy code for Organ Procurement Organization, in the NUCC group “Suppliers”. 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 335U00000X
- 2Level Classification
- 3Medicare specialty B4[14] Rural Health Clinic
- 4Codes in this group 31
Definition
A federally designated organization that works with hospital personnel in retrieval of organs for transplantation. The federal government designates an OPO's service area and the hospitals with which an OPO is to establish working relationships.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 335U00000X sits
- Group: Suppliers — code 18 of 31 in the group
- Classification: Organ Procurement Organization 335U00000X
Organ Procurement Organization has no specializations, so 335U00000X 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 335U00000X 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 Organ Procurement Organization. The rest of Suppliers is on the group page.
History of 335U00000X
NUCC's notes record no dated changes for 335U00000X. 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 335U00000X 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:
- 1835S0206X Solid Organ Transplant Pharmacist (Pharmacy Service Providers)
- 251T00000X PACE Provider Organization (Agencies)
- 302F00000X Exclusive Provider Organization (Managed Care Organizations)
- 302R00000X Health Maintenance Organization (Managed Care Organizations)
- 305R00000X Preferred Provider Organization (Managed Care Organizations)
Find providers with 335U00000X
Using 335U00000X
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.