William Earl Maes, MD

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

MD61476823 Issued in WA

Practice address

9245 Rainier Ave S
Seattle, WA 98118-5569

Phone

(206) 722-8444

Fax

(206) 721-6310

NPI assigned

Mar 28, 2019

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

Electronic endpoints 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

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Neighborcare HealthGroup PAC ID 0143134205, 100 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Swedish Medical Center Hospital, Seattle, WA, CCN 500027
• Valley Medical Center Hospital, Renton, WA, CCN 500088

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.

• Neighborcare Health

  • Federally Qualified Health Center (FQHC)
  • Seattle, WA
  • NPI 1578593562
  Medicare reassignment Care Compare group NPD
• Neighborcare Health

  • Federally Qualified Health Center (FQHC)
  • Seattle, WA
  • NPI 1275187429
  NPD
• Neighborcare Health

  • Federally Qualified Health Center (FQHC)
  • Seattle, WA
  • NPI 1275567539
  NPD
• Neighborcare Health

  • Federally Qualified Health Center (FQHC)
  • Seattle, WA
  • NPI 1275808214

  Family Medicine

  NPD
• Swedish Health Services

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1306992151
  NPD (past)

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

• Public Hospital District 1 of King County

  • General Acute Care Hospital
  • Renton, WA
  • NPI 1649209230
  Care Compare affiliation
• Swedish Health Services

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1306992151
  Care Compare affiliation
• Valley Medical Group-Renton

  • General Acute Care Hospital
  • Renton, WA
  • NPI 1619209574
  Care Compare affiliation

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

{
    "created_epoch": "1553731200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773705600000",
    "number": "1114488525",
    "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",
            "telephone_number": "920-737-3656"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9245 RAINIER AVE S",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981185569",
            "telephone_number": "206-722-8444",
            "fax_number": "206-721-6310"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "975 Sereno Dr",
            "address_2": "Family Medicine Department",
            "address_purpose": "LOCATION",
            "city": "Vallejo",
            "state": "CA",
            "postal_code": "945892441",
            "country_code": "US",
            "telephone_number": "707-651-4071",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MAES",
        "first_name": "WILLIAM",
        "middle_name": "EARL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-03-28",
        "last_updated": "2026-03-17",
        "certification_date": "2026-03-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WA",
            "license": "MD61476823",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "SOAP",
            "endpointTypeDescription": "SOAP URL",
            "endpoint": "https://careepicwest.kp.org:14430/Interconnect-prodcalgateway/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/ncalceq",
            "affiliation": "N",
            "endpointDescription": "Carequality",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "975 Sereno Dr",
            "address_2": "Family Medicine Department",
            "city": "Vallejo",
            "state": "CA",
            "country_code": "US",
            "postal_code": "945892441",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Christopher Y. Maeda, M.D.
• Mark Maeda, PHARMD
• Stephanie Akiko Maeda, DO
• Janine Ruth Maenza
• Conor Patrick Maertens Holland, CPHT
• Angela Jules Maestas
• Ramoncita Raquel Maestas, MD
• Tina M Maestas, RN BSN
• Hannah Julia Diocares Maestro, RN, BSN
• Sharon Jane Maffett, RC

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 17, 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.