Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joann Callorina Dominguez, MD

Hospitalist Physician in Oakland, CA · enumerated 2006.

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

National Provider Identifier

1811003809

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Registry record

Entity type Individual (Type 1)

Name Joann Callorina Dominguez

Credential MD

Sex Female

Practice address 350 Hawthorne Ave, Room 2346, Oakland, CA, 94609

Phone (510) 869-6883

Fax (510) 869-6888

Enumeration date Aug 22, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 16698 (NV) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A117117 (CA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License A117117 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
A117117	Other	CA	STATE LICENSE

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 Joann Dominguez?

Joann Dominguez is registered in NPPES with the primary taxonomy of Hospitalist Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.