COUNTY OF SAN MATEO
NPI 1255400909
Clinic/Center - Multi-Specialty in Daly City, 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 1255400909), doing business as San Mateo Medical Center, is a healthcare organization registered as a multi-specialty in Daly City, California and active in the NPI registry since November 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, 17 practice at this address and 153 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 593Source: 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 1255400909. It was assigned to this organization in the NPPES registry on November 7, 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 380 90th St, Daly City, CA 94015. The listed phone number is (650) 573-2222.
What is County Of San Mateo's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.
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, 17 practice at this address and 153 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 15, 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 1255400909
Multi-Specialty organization in Daly City, California. Organization record, active in the CMS NPPES registry since November 7, 2006.
## Identity
- **NPI:** 1255400909 (Entity type: Organization)
- **Enumerated:** November 7, 2006
- **Primary specialty:** Clinic/Center - Multi-Specialty · taxonomy 261QM1300X
- **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:** 380 90TH ST, Daly City, CA 94015-1807
- **Phone:** (650) 573-2222
## 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); 17 practice at this address and 153 within 10 miles; [full list](https://npiprofile.com/npi/1255400909/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 15, 2025
- **Other identifiers:** Medicaid GR0028882 (CA); Other ZZZ805642 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1255400909) · Data from the CMS NPPES public registry.