Individual provider Active NPI

Seiya Tokunaga, DO

  • Internal Medicine Physician
  • Oxnard, CA
National Provider Identifier
1629572334
Registry record updated Nov 7, 2021
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
20A17872 Issued in CA
Practice address
1600 N Rose Ave
Oxnard, CA 93030-3722
Phone
(805) 988-2505
Fax
(805) 988-2502
NPI assigned
Mar 19, 2018
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 7, 2021

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Internal Medicine Physician 207R00000X 20A17872 CA Primary

Addresses

Primary practice location

1600 N Rose Ave
Oxnard, CA 93030-3722

Mailing address

1600 N Rose Ave
Oxnard, CA 93030-3722
Phone (805) 988-2500

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20210806000891 CA Practitioner - HospitalistPractitioner - Internal Medicine 6901200377 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
HospitalistAlso: Internal Medicine
Education
Other, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Socal HospitalistsGroup PAC ID 3274047816, 30 clinicians

Practice addresses (Care Compare)

1050 Linden Ave
Long Beach, CA 90813-3321
Phone (562) 491-9469

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
20A17872CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Socal Hospitalists Internal Medicine CurrentSince May 25, 2025 Accepting new patients
Prohealth Partners, a Medical Group Internal Medicine Current Accepting new patients
Inpatient Specialists of California, PC Internal Medicine CurrentSince Jul 15, 2021 Accepting new patients

Locations

2309 Antonio Ave
Camarillo, CA 93010
Phone (805) 389-5655

1050 Linden Ave
Long Beach, CA 90813
Phone (562) 491-9000

File 54567
Los Angeles, CA 90074
Phone (310) 491-9060

21163 Newport Coast Dr
Newport Coast, CA 92657
Phone (800) 578-5145

1600 N Rose Ave
Oxnard, CA 93030
Phone (805) 988-2500

Organizations & group practices 3

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

Hospital & facility affiliations 1

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1521417600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1636243200000",
    "number": "1629572334",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1600 N ROSE AVE",
            "city": "OXNARD",
            "state": "CA",
            "postal_code": "930303722",
            "telephone_number": "805-988-2500"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1600 N ROSE AVE",
            "city": "OXNARD",
            "state": "CA",
            "postal_code": "930303722",
            "telephone_number": "805-988-2505",
            "fax_number": "805-988-2502"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TOKUNAGA",
        "first_name": "SEIYA",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-03-19",
        "last_updated": "2021-11-07",
        "certification_date": "2021-11-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "20A17872",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Oxnard, CA

Sources for this page

Verify at the official NPI Registry.