Agencies / 251B00000X
Non-Individual · classification
251B00000X Case Management Agency
251B00000X is the taxonomy code for Case Management, in the NUCC group “Agencies”. It is a code for organizations — the kind used on a Type 2 NPI. It has no entry in the CMS Medicare taxonomy crosswalk.
- 1Taxonomy code 251B00000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 15
Definition
An organization that is responsible for providing case management services. The agency provides services which assist an individual in gaining access to needed medical, social, educational, and/or other services. Case management services may be used to locate, coordinate, and monitor necessary appropriate services. It may be used to encourage the use of cost-effective medical care by referrals to appropriate providers and to discourage over utilization of costly services. Case management may also serve to provide necessary coordination of non-medical services such as vocational rehabilitation, education, employment, when the services provided enable the individual to function at the highest level.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 251B00000X sits
- Group: Agencies — code 1 of 15 in the group
- Classification: Case Management 251B00000X
Case Management has no specializations, so 251B00000X is the only code for it. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
251B00000X has no entry in the CMS Medicare Provider and Supplier Taxonomy Crosswalk. That usually means Medicare does not enroll this kind of provider under its own specialty — organizations of this type enroll, if at all, under a facility or supplier type rather than a practitioner specialty.
Related codes
No other codes share the classification Case Management. The rest of Agencies is on the group page.
History of 251B00000X
NUCC's earliest recorded change to 251B00000X is from 2006 (definition modified).
- 2006-07-01 — definition modified
Similar codes in other groups
If 251B00000X 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:
- 133VN1201X Obesity and Weight Management Nutrition Registered Dietitian (Dietary & Nutritional Service Providers)
- 152WC0802X Corneal and Contact Management Optometrist (Eye and Vision Services Providers)
- 163WC0400X Case Management Registered Nurse (Nursing Service Providers)
- 163WP0000X Pain Management Registered Nurse (Nursing Service Providers)
- 171M00000X Case Manager/Care Coordinator (Other Service Providers)
- 1744P3200X Prosthetics Case Management (Other Service Providers)
Find providers with 251B00000X
Using 251B00000X
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). Checked 2026-10-24. Methodology.