SANDRA GRAYBEAL WAI M.D.
NPI 1164667002
Pediatrics - Neonatal-Perinatal Medicine in Oakland, CA
About Sandra Graybeal Wai M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SANDRA GRAYBEAL WAI M.D. (NPI 1164667002) is an individual neonatal-perinatal medicine provider in Oakland, California, licensed in California (A106062) and active in the NPI registry since December 2008. She is enrolled in Medicare PECOS.
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 (PECOS)
Sandra Graybeal Wai M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Sandra Wai reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 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.
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.
OAKLAND, CA 94609
OAKLAND, CA 94609
OAKLAND, CA 94609
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 Sandra Wai's NPI number?
The NPI number for Sandra Wai is 1164667002. It was assigned to this individual provider in the NPPES registry on December 6, 2008. The provider is also known as Sandra Louise Graybeal MD.
Where is Sandra Wai located?
Sandra Wai practices at 747 52nd St, Oakland, CA 94609. The listed phone number is (510) 428-3000.
What is Sandra Wai's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.
Is Sandra Wai enrolled in Medicare?
Yes. Sandra Wai is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Sandra Wai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Wai reassigns Medicare benefits to 3 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Ucsf Pediatrics Associates (San Francisco, CA). 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 Sandra Wai'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 Sandra Wai was last updated on January 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Sandra Graybeal Wai, M.D. · NPI 1164667002
Neonatal-Perinatal Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since December 6, 2008.
## Identity
- **NPI:** 1164667002 (Entity type: Individual)
- **Enumerated:** December 6, 2008
- **Primary specialty:** Pediatrics - Neonatal-Perinatal Medicine · taxonomy 2080N0001X
- **State license:** A106062 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 747 52ND ST, Oakland, CA 94609-1809
- **Phone:** (510) 428-3000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 6, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1164667002) · Data from the CMS NPPES public registry.