Nathan Mercer, MD

Primary specialty

Hospitalist PhysicianTaxonomy code 208M00000X

License

MD61552788 Issued in WA

Practice address

925 Seneca St
Seattle, WA 98101-2742

Phone

(206) 625-7373

NPI assigned

Feb 19, 2018

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

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: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hospitalist

Education

University of Toledo College of Medicine, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Virginia Mason Medical CenterGroup PAC ID 9830002617, 867 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Virginia Mason Medical Center Hospital, Seattle, WA, CCN 500005
• Kittitas Valley Community Hospital Hospital, Ellensburg, WA, CCN 501333
• Grays Harbor Community Hospital Hospital, Aberdeen, WA, CCN 500031
• Highline Medical Center Hospital, Burien, WA, CCN 500011
• St Michael Medical Center Hospital, Silverdale, WA, CCN 500039

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.

• Virginia Mason Medical Center

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1801851258
  Medicare reassignment Care Compare group NPD
• Virginia Mason Medical Center

  • Internal Medicine Physician
  • Seattle, WA
  • NPI 1194889071
  NPD
• Virginia Mason Medical Center

  • Interventional Cardiology Physician
  • Tacoma, WA
  • NPI 1821711953
  NPD

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

• Commonspirit Washington Community Care

  • General Acute Care Hospital
  • Silverdale, WA
  • NPI 1518912609
  Care Compare affiliation
• Grays Harbor Community Hospital

  • General Acute Care Hospital
  • Aberdeen, WA
  • NPI 1154378859
  Care Compare affiliation
• Highline Medical Center

  • General Acute Care Hospital
  • Burien, WA
  • NPI 1558333682
  Care Compare affiliation
• Kittitas County Public Hospital Dist 1

  • Critical Access Hospital
  • Ellensburg, WA
  • NPI 1356375307
  Care Compare affiliation
• Virginia Mason Medical Center

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1801851258
  Care Compare affiliation

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

{
    "created_epoch": "1518998400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754524800000",
    "number": "1497255178",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 741515",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900741515",
            "telephone_number": "206-625-7373"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "925 SENECA ST",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981012742",
            "telephone_number": "206-625-7373"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "9040 Jackson Ave",
            "address_purpose": "LOCATION",
            "city": "Joint Base Lewis McChord",
            "state": "WA",
            "postal_code": "984310001",
            "country_code": "US",
            "telephone_number": "253-968-2462",
            "fax_number": "253-968-2972",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MERCER",
        "first_name": "NATHAN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-02-19",
        "last_updated": "2025-08-07",
        "certification_date": "2025-08-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "WA",
            "license": "MD61552788",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "VA",
            "license": "0101267697",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mary Ann Moreno Mercado
• Janssen Merced, RRT
• Freeman John Mercer, MA 60280484
• Loraine G Mercer, AUD
• Nancy J Mercer, ND
• Rebecca Mercer
• Laura W. Merchant, LICSW
• Leah Merchant
• Mythili Merchant, MS, LCGC
• Purva Suhas Merchant, B.D.S., M.S.

• Hospitalist Physician in Seattle, WA
• Providers in Seattle, WA by specialty
• Hospitalist Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 7, 2025; 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.