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Fred S Marcus, M.D. A Professional Corporation

Internal Medicine Physician in Redwood City, CA · enumerated 2007 · authorized official Fred Marcus, Owner.

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

National Provider Identifier

1669518189

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Registry record

Entity type Organization (Type 2)
Legal business name Fred S Marcus, M.D. A Professional Corporation
Practice address 2940 Whipple Ave, Suite B, Redwood City, CA, 94062
Phone (650) 216-8300
Fax (650) 216-8400
Enumeration date Jan 30, 2007
Last updated in NPPES Jul 2, 2008

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Fred Marcus
Title Owner
Phone (650) 216-8300

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

Who is the authorized official for Fred S Marcus, M.D. A Professional Corporation?
NPPES lists Fred Marcus (Owner) as the authorized official for this organization.
What is the NPI number for Fred S Marcus, M.D. A Professional Corporation?
The NPI for Fred S Marcus, M.D. A Professional Corporation is 1669518189, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-02.