RAY RUI ZHANG MD, PHD
NPI 1417418856
Nuclear Medicine in Stanford, CA
About Ray Rui Zhang Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RAY RUI ZHANG MD, PHD (NPI 1417418856) is an individual nuclear medicine provider in Stanford, California, licensed in California (A182515) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of University Of Wisconsin School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ray Rui Zhang Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
7Medicare enrollment records show Ray Zhang reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
San Jose, CA 95124
- Reassigned Medicare billing, California and Hawaii enrollments
- 181 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, Hawaii enrollment
- 45 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California and Hawaii enrollments
- 129 clinicians in this Medicare group
Stockton, CA 95204
- Reassigned Medicare billing, California enrollment
- 110 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
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 94305 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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Ray Zhang's NPI number?
The NPI number for Ray Zhang is 1417418856. It was assigned to this individual provider in the NPPES registry on March 28, 2019.
Where is Ray Zhang located?
Ray Zhang practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Ray Zhang's specialty?
The primary specialty registered for this NPI is Nuclear Medicine with taxonomy code 207U00000X.
Is Ray Zhang enrolled in Medicare?
Yes. Ray Zhang is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ray Zhang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ray Zhang reassigns Medicare benefits to 7 organizations: Stanford Health Care (Stanford, CA), Lpch Medical Group Div Of Lucile (Palo Alto, CA), Bay Imaging Consultants Medical Group Inc (San Jose, CA), Magnetic Imaging Affiliates, LLC (Oakland, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and 2 more organizations, listed in the Medicare section above. Each 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 Ray Zhang'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 Ray Zhang was last updated on March 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.