TOSHIA ANN YAMAGUCHI M.D.
NPI 1932558715
Psychiatry & Neurology - Psychiatry in Riverside, CA
About Toshia Ann Yamaguchi M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TOSHIA ANN YAMAGUCHI M.D. (NPI 1932558715) is an individual psychiatry provider in Riverside, California, licensed in California (A150914) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS and is a graduate of Creighton University School Of Medicine (2016).
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
Toshia Ann Yamaguchi M.d. 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 Toshia Ann Yamaguchi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Riverside, CA 92501
- Reassigned Medicare billing, California enrollment
- 60 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 92503 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.
RIVERSIDE, CA 92503
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 Toshia Ann Yamaguchi's NPI number?
The NPI number for Toshia Ann Yamaguchi is 1932558715. It was assigned to this individual provider in the NPPES registry on June 13, 2016.
Where is Toshia Ann Yamaguchi located?
Toshia Ann Yamaguchi practices at 4095 County Circle Dr, Riverside, CA 92503. The listed phone number is (951) 358-4500.
What is Toshia Ann Yamaguchi's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Toshia Ann Yamaguchi enrolled in Medicare?
Yes. Toshia Ann Yamaguchi 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 Toshia Ann Yamaguchi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Toshia Ann Yamaguchi reassigns Medicare benefits to Regents Of The University Of California (Riverside, 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 Toshia Ann Yamaguchi'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 Toshia Ann Yamaguchi was last updated on February 10, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Toshia Ann Yamaguchi, M.D. · NPI 1932558715
Psychiatry physician in Riverside, California. Individual provider, active in the CMS NPPES registry since June 13, 2016.
## Identity
- **NPI:** 1932558715 (Entity type: Individual)
- **Enumerated:** June 13, 2016
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** A150914 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4095 COUNTY CIRCLE DR, Riverside, CA 92503-3410
- **Phone:** (951) 358-4500
## 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:** Regents Of The University Of California (NPI 1811255060, Riverside, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Creighton University School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** February 10, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1932558715) · Data from the CMS NPPES public registry.