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Dr. Margaret Elizabeth Francisco, O.D.

Optometrist in Castro Valley, CA · enumerated 2017.

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

National Provider Identifier

1801337431

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Registry record

Entity type Individual (Type 1)
Name Dr. Margaret Elizabeth Francisco
Credential O.D.
Sex Female
Practice address 4041 E Castro Valley Blvd, Castro Valley, CA, 94552
Phone (510) 881-8343
Fax (510) 881-8501
Enumeration date Mar 15, 2017
Last updated in NPPES May 21, 2024

Taxonomy & licenses

152WV0400X Vision Therapy Optometrist Eye and Vision Services Providers · License 33815TLG (CA) Secondary
152W00000X Optometrist Eye and Vision Services Providers · License 33815TLG (CA) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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 Margaret Francisco?
Margaret Francisco is registered in NPPES with the primary taxonomy of Optometrist. 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 2024-05-21.