NPIMap

Individual provider Active NPI

Gia L Hemmen, MD

  • Family Medicine Physician
  • Redmond, WA
National Provider Identifier
1205858123
Registry record updated Feb 24, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
MD00035217 Issued in WA
Practice address
18100 NE Union Hill Rd Ste 200
Redmond, WA 98052-3330
Phone
(206) 320-5190
Fax
(206) 320-5191
NPI assigned
Jul 24, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 24, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Adult Medicine Physician 207QA0505X MD00035217 WA
Family Medicine Physician 207Q00000X MD00035217 WA Primary

Addresses

Primary practice location

18100 NE Union Hill Rd Ste 200
Redmond, WA 98052-3330

Mailing address

PO Box 25608
Salt Lake City, UT 84125-0608
Phone (206) 320-4476

Other identifiers 1

IdentifierTypeStateIssuer
1043248MedicaidWA

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
I20040930000071 WA Practitioner - Family Practice 1951370527 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Family Practice
Education
University of Washington School of Medicine, 1995
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Swedish Health ServicesGroup PAC ID 9537072814, 384 clinicians

Practice addresses (Care Compare)

18100 NE Union Hill Rd
Suite 200
Redmond, WA 98052-3330
Phone (206) 320-5190

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of skin lesions1-10
Removal or shaving of skin growth1-10

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Swedish Health Services Family Medicine CurrentSince Sep 8, 2025 Accepting new patients
Swedish Health Services CurrentSince Sep 8, 2025 Accepting new patients
Valley Medical Group-Renton Family Medicine CurrentSince May 15, 2010 Accepting new patients
Swedish Health Services Family Medicine Current Accepting new patients

Locations

16850 SE 272nd St
Covington, WA 98042
Phone (253) 395-1960

16850 SE 272nd St
Ste 100
Covington, WA 98042
Phone (253) 395-1971

13020 Meridian Ave S
Everett, WA 98208
Phone (425) 357-3700

24920 104th Ave SE
Kent, WA 98030
Phone (253) 395-1985

18100 NE Union Hill Rd
Ste 200
Redmond, WA 98052
Phone (206) 320-5190

4033 Talbot Rd S
Ste 570
Renton, WA 98055
Phone (425) 656-5400

1801 Lind Ave SW
Renton, WA 98057

3600 Lind Ave SW
Ste 100
Renton, WA 98057

2450 33rd Ave W
Ste 100
Seattle, WA 98199
Phone (206) 320-3364

Interoperability endpoints

  • Direct secure messaging: ghemmen4029809@wm.providencedirect.org

Organizations & group practices 4

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 6

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": "1153699200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771891200000",
    "number": "1205858123",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 25608",
            "city": "SALT LAKE CITY",
            "state": "UT",
            "postal_code": "841250608",
            "telephone_number": "206-320-4476"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18100 NE UNION HILL RD STE 200",
            "city": "REDMOND",
            "state": "WA",
            "postal_code": "980523330",
            "telephone_number": "206-320-5190",
            "fax_number": "206-320-5191"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HEMMEN",
        "first_name": "GIA",
        "middle_name": "L",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-07-24",
        "last_updated": "2026-02-24",
        "certification_date": "2026-02-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207QA0505X",
            "taxonomy_group": "",
            "desc": "Family Medicine, Adult Medicine",
            "state": "WA",
            "license": "MD00035217",
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WA",
            "license": "MD00035217",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1043248",
            "state": "WA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Redmond, WA

Sources for this page

Verify at the official NPI Registry.