WILLIAM FAN FNP-C
NPI 1548833510
Nurse Practitioner - Family in Mountain View, CA
About William Fan Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM FAN FNP-C (NPI 1548833510) is an individual family provider in Mountain View, California, licensed in California (95016247) and active in the NPI registry since July 2021. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William Fan Fnp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show William Fan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cerritos, CA 90703
- Reassigned Medicare billing, California enrollment
- 235 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94040 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MOUNTAIN VIEW, CA 94040
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 William Fan's NPI number?
The NPI number for William Fan is 1548833510. It was assigned to this individual provider in the NPPES registry on July 19, 2021.
Where is William Fan located?
William Fan practices at 701 E El Camino Real, Mountain View, CA 94040. The listed phone number is (650) 734-7808.
What is William Fan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is William Fan enrolled in Medicare?
Yes. William Fan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for William Fan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Fan reassigns Medicare benefits to Albion Medical Partners Of California West P C (Cerritos, CA). The 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 William Fan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for William Fan was last updated on September 29, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# William Fan, FNP-C · NPI 1548833510
Family physician in Mountain View, California. Individual provider, active in the CMS NPPES registry since July 19, 2021.
## Identity
- **NPI:** 1548833510 (Entity type: Individual)
- **Enumerated:** July 19, 2021
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 95016247 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 701 E EL CAMINO REAL, Mountain View, CA 94040-2833
- **Phone:** (650) 734-7808
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Albion Medical Partners Of California West P C (NPI 1073110607, Cerritos, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 29, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1548833510) · Data from the CMS NPPES public registry.