GRAY R. WILLIAMS DPM
NPI 1750455028
Podiatrist in Vallejo, CA
About Gray R. Williams Dpm NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRAY R. WILLIAMS DPM (NPI 1750455028) is an individual podiatrist in Vallejo, California, licensed in California (E4081) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Barry University School Of Podiatric Medicine (1995).
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 and accepts Medicare assignment
Gray R. Williams Dpm 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 Gray Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Vallejo, CA 94589
- Reassigned Medicare billing, California enrollment
- 20,078 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 94589 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.
VALLEJO, CA 94589
VALLEJO, CA 94589
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 Gray Williams's NPI number?
The NPI number for Gray Williams is 1750455028. It was assigned to this individual provider in the NPPES registry on November 20, 2006.
Where is Gray Williams located?
Gray Williams practices at 975 Sereno Dr, Vallejo, CA 94589. The listed phone number is (707) 651-1000.
What is Gray Williams's specialty?
The primary specialty registered for this NPI is Podiatrist with taxonomy code 213E00000X.
Is Gray Williams enrolled in Medicare?
Yes. Gray Williams 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 Gray Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gray Williams reassigns Medicare benefits to Permanente Medical Group Inc (Vallejo, 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 Gray Williams'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 Gray Williams was last updated on December 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Gray R. Williams, DPM · NPI 1750455028
Podiatrist provider in Vallejo, California. Individual provider, active in the CMS NPPES registry since November 20, 2006.
## Identity
- **NPI:** 1750455028 (Entity type: Individual)
- **Enumerated:** November 20, 2006
- **Primary specialty:** Podiatrist · taxonomy 213E00000X
- **State license:** E4081 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 975 SERENO DR, Vallejo, CA 94589-2441
- **Phone:** (707) 651-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Barry University School Of Podiatric Medicine, class of 1995
## Record status
- **NPPES last updated:** December 6, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1750455028) · Data from the CMS NPPES public registry.