NPI Portal NPI Lookup & Verification

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Eleanor Tannis

Specialist in Oakland, CA · enumerated 2010.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1033436803

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Registry record

Entity type Individual (Type 1)
Name Eleanor Tannis
Sex Female
Practice address 1422 Harrison St, Oakland, CA, 94612
Phone (510) 809-1780
Fax (570) 893-1642
Enumeration date May 3, 2010
Last updated in NPPES May 3, 2010

Taxonomy & licenses

174400000X Specialist Other Service Providers Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Eleanor Tannis?
Eleanor Tannis is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-03.