WEST BAY NEPHROLOGY ASSOCIATES
NPI 1336117829
Internal Medicine - Nephrology in Daly City, CA
About West Bay Nephrology Associates NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WEST BAY NEPHROLOGY ASSOCIATES (NPI 1336117829) is a healthcare organization registered as a nephrology in Daly City, California and active in the NPI registry since March 2006. The organization lists Robert R Tseng, Nephrologist, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 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)
West Bay Nephrology Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
16Medicare enrollment records show 16 clinicians reassign Medicare billing to West Bay Nephrology Associates, which bills Medicare for the services they deliver. Of these, 7 practice at this address and 11 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 6
Clinicians, nearest first (16)
San Jose, CA 95128
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 West Bay Nephrology Associates's NPI number?
The NPI number for West Bay Nephrology Associates is 1336117829. It was assigned to this organization in the NPPES registry on March 9, 2006.
Where is West Bay Nephrology Associates located?
West Bay Nephrology Associates is located at 1498 Southgate Ave Suite 102, Daly City, CA 94015. The listed phone number is (650) 755-4492.
What is West Bay Nephrology Associates's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is West Bay Nephrology Associates enrolled in Medicare?
Yes. West Bay Nephrology Associates is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through West Bay Nephrology Associates?
According to the CMS Revalidation Reassignment List (October 2026 release), 16 clinicians in 6 Medicare specialties reassign their Medicare billing to West Bay Nephrology Associates. 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 Nephrology (6), Diagnostic Radiology (5) and Interventional Radiology (2). Of these, 7 practice at this address and 11 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 West Bay Nephrology Associates was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.
# West Bay Nephrology Associates · NPI 1336117829
Nephrology organization in Daly City, California. Organization record, active in the CMS NPPES registry since March 9, 2006.
## Identity
- **NPI:** 1336117829 (Entity type: Organization)
- **Enumerated:** March 9, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **Organization subpart:** No
- **Authorized official:** Robert Tseng, NEPHROLOGIST
## Practice location
- **Address:** 1498 SOUTHGATE AVE, SUITE 102, Daly City, CA 94015
- **Phone:** (650) 755-4492 · **Fax:** (650) 755-4466
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 16 clinicians in 6 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nephrology (6), Diagnostic Radiology (5), Interventional Radiology (2); 7 practice at this address and 11 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 22, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1336117829) · Data from the CMS NPPES public registry.