County of San Mateo
NPI 1346271814 · Emergency Medicine Physician · San Mateo, CA
County of San Mateo is a Emergency Medicine Physician organization in San Mateo, CA (NPI 1346271814).
Provider details
- NPI number
- 1346271814
- Entity type
- Organization
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Parent organization
- County of San Mateo
- Organization subpart
- Yes
- Authorized official
- Mark Spiro, M.D Vpo(510) 350-2777
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
- 2006-07-05
- Last updated
- 2008-07-22
Frequently asked questions
- What is County of San Mateo's NPI number?
- County of San Mateo's National Provider Identifier (NPI) is 1346271814, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is County of San Mateo?
- County of San Mateo is classified in the NPPES registry as Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is County of San Mateo located?
- County of San Mateo's practice location on file with NPPES is 222 W 39th Ave, San Mateo, CA 94403.
- What is County of San Mateo's phone number?
- The practice phone number listed in the NPPES registry for County of San Mateo is (650) 573-2671.
- Who is the authorized official for County of San Mateo?
- The authorized official listed on County of San Mateo's NPPES record is Mark Spiro, M.D Vpo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is County of San Mateo's NPI active?
- Yes — County of San Mateo's NPI (1346271814) is active in the NPPES registry as of the last update on 2008-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.