BENJAMIN WEIZER CHANG
NPI 1952780652
Nurse Practitioner in Fremont, CA
About Benjamin Weizer Chang NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BENJAMIN WEIZER CHANG (NPI 1952780652) is an individual nurse practitioner in Fremont, California, licensed in California (95002080) and active in the NPI registry since May 2015. He is enrolled in Medicare PECOS and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Benjamin Weizer Chang is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Benjamin Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94538 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 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FREMONT, CA 94538
FREMONT, CA 94538
FREMONT, CA 94538
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 Benjamin Chang's NPI number?
The NPI number for Benjamin Chang is 1952780652. It was assigned to this individual provider in the NPPES registry on May 27, 2015. The provider is also known as Ben W. Chang Msn, Aprn, Np-C.
Where is Benjamin Chang located?
Benjamin Chang practices at 39180 Farwell Dr, Fremont, CA 94538. The listed phone number is (510) 585-2545.
What is Benjamin Chang's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Benjamin Chang enrolled in Medicare?
Yes. Benjamin Chang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Benjamin Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Benjamin Chang reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, 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 Benjamin Chang'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 Benjamin Chang was last updated on May 27, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Benjamin Weizer Chang · NPI 1952780652
Nurse Practitioner physician in Fremont, California. Individual provider, active in the CMS NPPES registry since May 27, 2015.
## Identity
- **NPI:** 1952780652 (Entity type: Individual)
- **Enumerated:** May 27, 2015
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 95002080 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 39180 FARWELL DR, Fremont, CA 94538-1000
- **Phone:** (510) 585-2545
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** May 27, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1952780652) · Data from the CMS NPPES public registry.