Individual provider Active NPI

Gregory H. Shimizu, MD

  • Internal Medicine Physician
  • Fontana, CA
National Provider Identifier
1154492130
Registry record updated Sep 23, 2008
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
G67137 Issued in CA
Practice address
9961 Sierra Ave
Fontana, CA 92335-6720
Phone
(909) 427-3910
NPI assigned
Nov 13, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 23, 2008

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X G67137 CA Primary

Addresses

Primary practice location

9961 Sierra Ave
Fontana, CA 92335-6720

Mailing address

9961 Sierra Ave
Fontana, CA 92335-6720
Phone (909) 427-3910

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
I20081212000392 CA Practitioner - Internal Medicine 5395806038 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
George Washington University School of Medicine, 1988
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Temecula Valley Hospitalist Medical Group IncGroup PAC ID 8224252630, 26 clinicians

Practice addresses (Care Compare)

31700 Temecula Pkwy
Temecula, CA 92592-5896
Phone (951) 331-2200

Hospital & facility affiliations

  • Temecula Valley Hospital Hospital, Temecula, CA, CCN 050775

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
67137CAMDSocial Worker
G67137CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Temecula Valley Hospitalist Medical Group, Inc. Internal Medicine CurrentSince Dec 29, 2025 Accepting new patients
Alertive Healthcare Medical Group PC Internal Medicine PastSince Jul 28, 2024 Accepting new patients

Locations

31700 Temecula Pkwy
Temecula, CA 92592
Phone (951) 303-8939

Organizations & group practices 2

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": "1163376000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1222128000000",
    "number": "1154492130",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9961 SIERRA AVE",
            "city": "FONTANA",
            "state": "CA",
            "postal_code": "923356720",
            "telephone_number": "909-427-3910"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9961 SIERRA AVE",
            "city": "FONTANA",
            "state": "CA",
            "postal_code": "923356720",
            "telephone_number": "909-427-3910"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SHIMIZU",
        "first_name": "GREGORY",
        "middle_name": "H.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-11-13",
        "last_updated": "2008-09-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G67137",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Fontana, CA

Sources for this page

Verify at the official NPI Registry.