MR. TREY'VONNE MARSEILLE WILLIAMS-SEYMORE RN
NPI 1417615774
Nurse Practitioner - Psychiatric/Mental Health in San Leandro, CA
About Mr. Trey'vonne Marseille Williams-seymore Rn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. TREY'VONNE MARSEILLE WILLIAMS-SEYMORE RN (NPI 1417615774) is an individual psychiatric/mental health provider in San Leandro, California, licensed in Florida (APRN11051545) and active in the NPI registry since December 2021.
NPPES Registry Identity
Specialties & Licenses
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.
SAN LEANDRO, CA 94578
SAN LEANDRO, CA 94578
CASTRO VALLEY, CA 94578
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 Trey'vonne Williams-seymore's NPI number?
The NPI number for Trey'vonne Williams-seymore is 1417615774. It was assigned to this individual provider in the NPPES registry on December 3, 2021.
Where is Trey'vonne Williams-seymore located?
Trey'vonne Williams-seymore practices at 2050 Fairmont Dr, San Leandro, CA 94578. The listed phone number is (425) 240-2943.
What is Trey'vonne Williams-seymore's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
When was this NPI record last updated?
The NPPES record for Trey'vonne Williams-seymore was last updated on October 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days 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.
# Mr. Trey'vonne Marseille Williams-Seymore, RN · NPI 1417615774
Psychiatric/Mental Health physician in San Leandro, California. Individual provider, active in the CMS NPPES registry since December 3, 2021.
## Identity
- **NPI:** 1417615774 (Entity type: Individual)
- **Enumerated:** December 3, 2021
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** APRN11051545 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 2050 FAIRMONT DR, San Leandro, CA 94578-1001
- **Phone:** (425) 240-2943
## Record status
- **NPPES last updated:** October 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1417615774) · Data from the CMS NPPES public registry.