Tiffany Lynn Mathias Fielder, MD

Primary specialty

Pain Medicine PhysicianTaxonomy code 208VP0000X

License

61496551 Issued in WA

Practice address

4027 Hoyt Ave
Everett, WA 98201-4920

Phone

(206) 860-5414

NPI assigned

Jun 3, 2016

Sex

Female

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

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CA, WA2 enrollments

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 2

Specialty

Pain ManagementAlso: Emergency Medicine

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Rapid Care Enterprises, Inc.Group PAC ID 4789964040, 2 clinicians

Practice addresses (Care Compare)

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.

• Rapid Care Enterprises, Inc

  • Urgent Care Clinic/Center
  • Perris, CA
  • NPI 1023560604
  Medicare reassignment Care Compare group NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Baldwin Park, CA
  • NPI 1770515280
  Medicare reassignment NPD
• Optum Care Washington PLLC

  • Multi-Specialty Clinic/Center
  • Everett, WA
  • NPI 1831186766
  Medicare reassignment
• The Polyclinic PLLC

  • Audiologist
  • Seattle, WA
  • NPI 1174594634
  Medicare reassignment
• Optum Care Washington PLLC

  • Durable Medical Equipment & Medical Supplies
  • Marysville, WA
  • NPI 1194428425
  NPD
• Optum Care Washington PLLC

  • Ambulatory Surgical Clinic/Center
  • Arlington, WA
  • NPI 1366154304
  NPD
• The Polyclinic PLLC

  • Durable Medical Equipment & Medical Supplies
  • Tacoma, WA
  • NPI 1831411487
  NPD
• Rapid Care Enterprises, Inc

  • Urgent Care Clinic/Center
  • Banning, CA
  • NPI 1588339360
  NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Bellflower, CA
  • NPI 1043242555
  NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Santa Clarita, CA
  • NPI 1316409410
  NPD

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

{
    "created_epoch": "1464912000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776643200000",
    "number": "1891144580",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 5127",
            "city": "EVERETT",
            "state": "WA",
            "postal_code": "982065127",
            "telephone_number": "206-860-5414"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4027 HOYT AVE",
            "city": "EVERETT",
            "state": "WA",
            "postal_code": "982014920",
            "telephone_number": "206-860-5414"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MATHIAS FIELDER",
        "first_name": "TIFFANY",
        "middle_name": "LYNN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2016-06-03",
        "last_updated": "2026-04-20",
        "certification_date": "2026-04-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208VP0014X",
            "taxonomy_group": "",
            "desc": "Pain Medicine, Interventional Pain Medicine",
            "state": "CA",
            "license": "A161559",
            "primary": false
        },
        {
            "code": "208VP0000X",
            "taxonomy_group": "",
            "desc": "Pain Medicine, Pain Medicine",
            "state": "WA",
            "license": "61496551",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICAL LIC",
            "identifier": "A161559",
            "state": "CA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "SOAP",
            "endpointTypeDescription": "SOAP URL",
            "endpoint": "https://careepicwest.kp.org:14430/Interconnect-prodcalgateway/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/scalceq",
            "affiliation": "Y",
            "endpointDescription": "Carequality",
            "affiliationName": "Southern California Permanente Medical Group",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "9333 Imperial Hwy",
            "city": "Downey",
            "state": "CA",
            "country_code": "US",
            "postal_code": "902422812",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Aleza Matayoshi, MD
• Michael George Mathern, M.S.
• Kimberley Ann Mathers
• Lee Matheson
• Carly Denise Mathews
• Stephen John Mathias, MA, RC
• John F Matista, PA-C
• Heidi Matlack
• Karl Frederic Matous, IDC
• Samantha Annette Matras

• Pain Medicine Physician in Everett, WA
• Providers in Everett, WA by specialty
• Pain Medicine Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 20, 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.