Fred S Marcus, M.D. a Professional Corporation
NPI 1669518189 · Internal Medicine Physician · Redwood City, CA
Fred S Marcus, M.D. a Professional Corporation is a Internal Medicine Physician organization in Redwood City, CA (NPI 1669518189).
Provider details
- NPI number
- 1669518189
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Fred Marcus, Owner(650) 216-8300
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Medical Oncology Physician207RX0202X
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-30
- Last updated
- 2008-07-02
Frequently asked questions
- What is Fred S Marcus, M.D. a Professional Corporation's NPI number?
- Fred S Marcus, M.D. a Professional Corporation's National Provider Identifier (NPI) is 1669518189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Fred S Marcus, M.D. a Professional Corporation?
- Fred S Marcus, M.D. a Professional Corporation is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Fred S Marcus, M.D. a Professional Corporation located?
- Fred S Marcus, M.D. a Professional Corporation's practice location on file with NPPES is 2940 Whipple Ave, Redwood City, CA 94062-2857.
- What is Fred S Marcus, M.D. a Professional Corporation's phone number?
- The practice phone number listed in the NPPES registry for Fred S Marcus, M.D. a Professional Corporation is (650) 216-8300.
- Who is the authorized official for Fred S Marcus, M.D. a Professional Corporation?
- The authorized official listed on Fred S Marcus, M.D. a Professional Corporation's NPPES record is Fred Marcus, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Fred S Marcus, M.D. a Professional Corporation's NPI active?
- Yes — Fred S Marcus, M.D. a Professional Corporation's NPI (1669518189) is active in the NPPES registry as of the last update on 2008-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.