NPIMap

Individual provider Active NPI

Gary Thomas Underhill, MD

  • Family Medicine Physician
  • Dayton, WA
National Provider Identifier
1851375265
Registry record updated Mar 3, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
MD00037711 Issued in WA
Practice address
1012 S 3Rd St
Dayton, WA 99328
Phone
(509) 382-2531
Fax
(509) 382-3205
NPI assigned
Nov 30, 2005
Last updated
Mar 3, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 3, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X MD00037711 WA
Emergency Medicine Physician 207P00000X MD0037711 WA
Family Medicine Physician 207Q00000X MD00037711 WA Primary

Addresses

Primary practice location

1012 S 3Rd St
Dayton, WA 99328

Mailing address

1012 S 3Rd St
Dayton, WA 99328
Phone (509) 382-2531

Other identifiers 1

IdentifierTypeStateIssuer
1020580MedicaidWA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20070827000624 WA Practitioner - Emergency Medicine 1850483470 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
Loma Linda University School of Medicine, 1996
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1012 S 3Rd St
Dayton, WA 99328-1606
Phone (509) 382-2531

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MD0037711WAMDEmergency Medicine Physician
MD00037711WAMDFamily Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Washington Emergency Physician Partners, PLLC Emergency Medicine CurrentSince May 2, 2022 Accepting new patients
Columbia County Hospital District CurrentSince Sep 14, 2017 Accepting new patients
Columbia County Hospital District CurrentSince Sep 14, 2017 Accepting new patients
Washington Emergency Physician Partners PLLC Emergency Medicine CurrentSince May 2, 2022 Accepting new patients
Sound Physicians Emergency Medicine of Washington PLLC Emergency Medicine CurrentSince Apr 1, 2025 Accepting new patients

Locations

1012 S 3rd St
Dayton, WA 99328
Phone (509) 382-2531

3810 Plaza Way
Kennewick, WA 99338
Phone (509) 221-7000

2000 Hospital Dr
Sedro Woolley, WA 98284
Phone (360) 856-6021

Organizations & group practices 5

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.

Hospital & facility affiliations 3

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": "1133308800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1740960000000",
    "number": "1851375265",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1012 S 3RD ST",
            "city": "DAYTON",
            "state": "WA",
            "postal_code": "99328",
            "telephone_number": "509-382-2531",
            "fax_number": "509-382-3205"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1012 S 3RD ST",
            "city": "DAYTON",
            "state": "WA",
            "postal_code": "99328",
            "telephone_number": "509-382-2531",
            "fax_number": "509-382-3205"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "UNDERHILL",
        "first_name": "GARY",
        "middle_name": "THOMAS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-11-30",
        "last_updated": "2025-03-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "WA",
            "license": "MD00037711",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "WA",
            "license": "MD0037711",
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WA",
            "license": "MD00037711",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1020580",
            "state": "WA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Dayton, WA

Sources for this page

Verify at the official NPI Registry.