COUNTY OF SAN MATEO
NPI 1336239052
Clinic/Center - Medical Specialty in Menlo Park, CA
About County Of San Mateo NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
COUNTY OF SAN MATEO (NPI 1336239052), doing business as San Mateo Medical Center, is a healthcare organization registered as a medical specialty in Menlo Park, California and active in the NPI registry since October 2006. The organization lists Jennifer Papa, Chief Financial Officer, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
County Of San Mateo is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
593Medicare enrollment records show 593 clinicians reassign Medicare billing to County Of San Mateo, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 185 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 52
Nearest to this location (20)
See all 593Stanford, CA 94305
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is County Of San Mateo's NPI number?
The NPI number for County Of San Mateo is 1336239052. It was assigned to this organization in the NPPES registry on October 13, 2006. The provider is doing business as San Mateo Medical Center.
Where is County Of San Mateo located?
County Of San Mateo is located at 795 Willow Rd, Menlo Park, CA 94025. The listed phone number is (650) 599-3890.
What is County Of San Mateo's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Medical Specialty, with taxonomy code 261QM2500X.
Is County Of San Mateo enrolled in Medicare?
Yes. County Of San Mateo is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through County Of San Mateo?
According to the CMS Revalidation Reassignment List (October 2026 release), 593 clinicians in 52 Medicare specialties reassign their Medicare billing to County Of San Mateo. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Psychiatry (89), Nurse Practitioner (82) and Internal Medicine (59). Of these, 1 practice at this address and 185 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for County Of San Mateo was last updated on October 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# County Of San Mateo · NPI 1336239052
Medical Specialty organization in Menlo Park, California. Organization record, active in the CMS NPPES registry since October 13, 2006.
## Identity
- **NPI:** 1336239052 (Entity type: Organization)
- **Enumerated:** October 13, 2006
- **Primary specialty:** Clinic/Center - Medical Specialty · taxonomy 261QM2500X
- **Also known as:** San Mateo Medical Center (Doing Business As)
- **Organization subpart:** Yes (part of County Of San Mateo)
- **Authorized official:** Jennifer Papa, CHIEF FINANCIAL OFFICER
## Practice location
- **Address:** 795 WILLOW RD, Menlo Park, CA 94025-2539
- **Phone:** (650) 599-3890
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 593 clinicians in 52 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Psychiatry (89), Nurse Practitioner (82), Internal Medicine (59); 1 practice at this address and 185 within 10 miles; [full list](https://npiprofile.com/npi/1336239052/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 16, 2025
- **Other identifiers:** Other ZZZ085052 (CA); Medicaid GR0028885 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1336239052) · Data from the CMS NPPES public registry.