Thomas Rey Yamamoto, MD

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

G66872 Issued in CA

Practice address

450 E Huntington Dr
Arcadia, CA 91006-3748

Phone

(626) 462-1884

NPI assigned

Jul 18, 2006

Last updated

Mar 27, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Obstetrics/Gynecology

Education

University of California, San Diego School of Medicine, 1988

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Healthcare Partners Affiliates Medical GroupGroup PAC ID 7315842002, 775 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: thomasyamamoto@hcpca.allscriptsdirect.net
• Direct secure messaging: tyamamoto207688@westdirect.optum.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593
  Medicare reassignment Care Compare group NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD
• Ahmc San Gabriel Valley Medical

  dba AHMC San Gabriel Valley Medical Center

  • Skilled Nursing Facility
  • San Gabriel, CA
  • NPI 1710174818
  NPD (past)
• Dignity Community Care

  dba California Hospital Medical Center - Los Angeles

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1114081056
  NPD (past)
• Pasadena Hospital Association, LTD.

  dba Huntington Hospital

  • Psychiatric Hospital Unit
  • Pasadena, CA
  • NPI 1437121142
  NPD (past)
• Memorial Medical Group Inc

  • Durable Medical Equipment & Medical Supplies
  • Phoenix, AZ
  • NPI 1255523643
  NPD (past)
• Methodist Health, Inc.

  dba Deaconess Henderson Hospital Providers

  • Hospitalist Physician
  • Henderson, KY
  • NPI 1679718100
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1153180800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774569600000",
    "number": "1083633457",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380",
            "telephone_number": "702-579-3203"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "450 E HUNTINGTON DR",
            "city": "ARCADIA",
            "state": "CA",
            "postal_code": "910063748",
            "telephone_number": "626-462-1884"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "YAMAMOTO",
        "first_name": "THOMAS",
        "middle_name": "REY",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-18",
        "last_updated": "2026-03-27",
        "certification_date": "2026-03-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "CA",
            "license": "G66872",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G668720",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Juan Xu, L.AC
• Jun Xu, M.D.
• Ya-Wen Cheng
• Nardin Yacoub
• Alan H Yamada, MD
• Yihan Yan, PHARMD
• Amber Yang
• Cassie Yang, D.D.S
• Cherie Yang, SLP
• Chia Hao Yang, PT

• Obstetrics & Gynecology Physician in Arcadia, CA
• Providers in Arcadia, CA by specialty
• Obstetrics & Gynecology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 27, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.