Alex Kosloff, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD60331130 Issued in WA

Practice address

1930 Post Aly
Seattle, WA 98101-1074

Phone

(206) 728-4143

Fax

(206) 956-1018

NPI assigned

Apr 26, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in WA

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

Internal Medicine

Education

Saint Louis University School of Medicine, 1980

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Grays Harbor Community HospitalGroup PAC ID 3577462365, 91 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Harbors Home Health / Hospice Home health agency, Hoquiam, WA, CCN 507020
• Assured Home Health and Hospice Home health agency, Centralia, WA, CCN 507042
• Grays Harbor Community Hospital Hospital, Aberdeen, WA, CCN 500031

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Grays Harbor Community Hospital

  • General Acute Care Hospital
  • Aberdeen, WA
  • NPI 1154378859
  Medicare reassignment Care Compare group NPD
• Community Health Center of Snohomish County

  • Federally Qualified Health Center (FQHC)
  • Everett, WA
  • NPI 1730136367
  Medicare reassignment NPD
• Community Health Center of Snohomish County

  • Federally Qualified Health Center (FQHC)
  • Everett, WA
  • NPI 1023830346
  NPD
• Grays Harbor Community Hospital

  dba GHCH Hoquiam Clinic

  • Rural Health Clinic/Center
  • Hoquiam, WA
  • NPI 1376028373
  NPD
• Grays Harbor Community Hospital

  dba GHCH Westport Clinic

  • Clinic/Center
  • Westport, WA
  • NPI 1497510333
  NPD
• Northeast Arkansas Clinic, PA

  dba NEA Clinic

  • Multi-Specialty Clinic/Center
  • Jonesboro, AR
  • NPI 1376517177
  NPD (past)

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

• Grays Harbor Community Hospital

  • General Acute Care Hospital
  • Aberdeen, WA
  • NPI 1154378859
  Care Compare affiliation
• Harbors Home Health & Hospice

  • Home Health Agency
  • Hoquiam, WA
  • NPI 1699777276
  Care Compare affiliation
• Northwest Healthcare Alliance, Inc.

  dba Assured Home Health & Hospice

  • Home Health Agency
  • Centralia, WA
  • NPI 1154397305
  Care Compare affiliation

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

{
    "created_epoch": "1146009600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788307200000",
    "number": "1598722597",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1200 12TH AVE S STE 901",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981442712"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1930 POST ALY",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981011074",
            "telephone_number": "206-728-4143",
            "fax_number": "206-956-1018"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "6500 Hospital Dr",
            "address_purpose": "LOCATION",
            "city": "Hannibal",
            "state": "MO",
            "postal_code": "634016890",
            "country_code": "US",
            "telephone_number": "573-629-3419",
            "fax_number": "573-629-3416",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1006 N H St",
            "address_purpose": "LOCATION",
            "city": "Aberdeen",
            "state": "WA",
            "postal_code": "985202521",
            "country_code": "US",
            "telephone_number": "360-537-6496",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KOSLOFF",
        "first_name": "ALEX",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-04-26",
        "last_updated": "2026-09-02",
        "certification_date": "2026-09-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WA",
            "license": "MD60331130",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "AR",
            "license": "E-4604",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1598722597",
            "state": "MO"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• David John Kosins, PH.D.
• Natalie Koskela-Staples, PHD
• Victoria Esther Koski-Karell, MD, PHD
• Chloe Koski, MD
• Lindsey Koski, DPT
• Elizabeth Jane Kosloff, LICSW
• Angie Kosnoski
• Cameron Kossen
• Madeline Kossik
• Amanda Rhea Kost, MD

• Internal Medicine Physician in Seattle, WA
• Providers in Seattle, WA by specialty
• Internal Medicine Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 2, 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.