Robert Spencer, M.D.
NPI 1477758993 · Emergency Medicine Physician · San Mateo, CA
Robert Spencer, M.D. is a Emergency Medicine Physician provider in San Mateo, CA (NPI 1477758993).
Provider details
- NPI number
- 1477758993
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G20456 (CA)
Specialties & taxonomies
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
- 2007-06-15
- Last updated
- 2008-03-06
Frequently asked questions
- What is Robert Spencer's NPI number?
- Robert Spencer's National Provider Identifier (NPI) is 1477758993, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Spencer's specialty?
- Robert Spencer is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Spencer located?
- Robert Spencer's practice location on file with NPPES is 222 W 39th Ave, San Mateo, CA 94403-4364.
- What is Robert Spencer's phone number?
- The practice phone number listed in the NPPES registry for Robert Spencer is (650) 573-2671.
- Is Robert Spencer's NPI active?
- Yes — Robert Spencer's NPI (1477758993) is active in the NPPES registry as of the last update on 2008-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.