CITY & COUNTY OF SAN FRANCISCO
NPI 1053351916
Clinic/Center - Primary Care in San Francisco, CA
About City & County Of San Francisco NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CITY & COUNTY OF SAN FRANCISCO (NPI 1053351916), doing business as Maria X Martinez Health Resource Center, is a healthcare organization registered as a primary care in San Francisco, California and active in the NPI registry since June 2006. The organization lists Timothy Arnold, Deputy Director, Pfs, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
City & County Of San Francisco is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
1,561Medicare enrollment records show 1,561 clinicians reassign Medicare billing to City & County Of San Francisco, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 1,216 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 58
Nearest to this location (20)
See all 1,561San Francisco, CA 94102
San Francisco, CA 94102
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 City & County Of San Francisco's NPI number?
The NPI number for City & County Of San Francisco is 1053351916. It was assigned to this organization in the NPPES registry on June 8, 2006. The provider is doing business as Maria X Martinez Health Resource Center.
Where is City & County Of San Francisco located?
City & County Of San Francisco is located at 555 Stevenson St, San Francisco, CA 94103. The listed phone number is (628) 217-5800.
What is City & County Of San Francisco's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.
Is City & County Of San Francisco enrolled in Medicare?
Yes. City & County Of San Francisco is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through City & County Of San Francisco?
According to the CMS Revalidation Reassignment List (October 2026 release), 1,561 clinicians in 58 Medicare specialties reassign their Medicare billing to City & County Of San Francisco. 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 Nurse Practitioner (232), Internal Medicine (192) and Family Practice (136). Of these, 1 practice at this address and 1,216 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 City & County Of San Francisco was last updated on July 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# City & County Of San Francisco · NPI 1053351916
Primary Care organization in San Francisco, California. Organization record, active in the CMS NPPES registry since June 8, 2006.
## Identity
- **NPI:** 1053351916 (Entity type: Organization)
- **Enumerated:** June 8, 2006
- **Primary specialty:** Clinic/Center - Primary Care · taxonomy 261QP2300X
- **Also known as:** Maria X Martinez Health Resource Center (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Timothy Arnold, DEPUTY DIRECTOR, PFS
## Practice location
- **Address:** 555 STEVENSON ST, San Francisco, CA 94103-1606
- **Phone:** (628) 217-5800
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1,561 clinicians in 58 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (232), Internal Medicine (192), Family Practice (136); 1 practice at this address and 1,216 within 10 miles; [full list](https://npiprofile.com/npi/1053351916/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 1, 2025
- **Other identifiers:** Medicaid FHC70465F (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1053351916) · Data from the CMS NPPES public registry.