THOMAS REY YAMAMOTO MD
NPI 1083633457
Obstetrics & Gynecology in Arcadia, CA
About Thomas Rey Yamamoto Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS REY YAMAMOTO MD (NPI 1083633457) is an individual obstetrics & gynecology provider in Arcadia, California, licensed in California (G66872) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Thomas Rey Yamamoto Md 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 Thomas Yamamoto reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90015
- Reassigned Medicare billing, California enrollment
- 2,052 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 91006 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.
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 Thomas Yamamoto's NPI number?
The NPI number for Thomas Yamamoto is 1083633457. It was assigned to this individual provider in the NPPES registry on July 18, 2006.
Where is Thomas Yamamoto located?
Thomas Yamamoto practices at 450 E Huntington Dr, Arcadia, CA 91006. The listed phone number is (626) 462-1884.
What is Thomas Yamamoto's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Thomas Yamamoto enrolled in Medicare?
Yes. Thomas Yamamoto 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 Thomas Yamamoto's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Yamamoto reassigns Medicare benefits to Healthcare Partners Affiliates Medical Group (Los Angeles, 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 Thomas Yamamoto'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 Thomas Yamamoto was last updated on March 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Thomas Rey Yamamoto, MD · NPI 1083633457
Obstetrics & Gynecology physician in Arcadia, California. Individual provider, active in the CMS NPPES registry since July 18, 2006.
## Identity
- **NPI:** 1083633457 (Entity type: Individual)
- **Enumerated:** July 18, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** G66872 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 450 E HUNTINGTON DR, Arcadia, CA 91006-3748
- **Phone:** (626) 462-1884
## 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:** Healthcare Partners Affiliates Medical Group (NPI 1659312593, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** March 27, 2026
- **Other identifiers:** Medicaid 00G668720 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1083633457) · Data from the CMS NPPES public registry.