Individual provider Active NPI

Michael Ashton Theobald, M.D.

  • Specialist
  • Edmonds, WA
National Provider Identifier
1821047556
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
SpecialistTaxonomy code 174400000X
License
MD00011020 Issued in WA
Practice address
21601 76TH Ave W
Edmonds, WA 98026-7507
Phone
(425) 640-4000
NPI assigned
May 9, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Specialist 174400000X MD00011020 WA Primary

Addresses

Primary practice location

21601 76TH Ave W
Edmonds, WA 98026-7507

Mailing address

12042 6TH Ave NW
Seattle, WA 98177-4521
Phone (206) 361-8408

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MD00011020WAMDSpecialist

Practice roles

OrganizationSpecialtyStatusNew patients
Public Hospital District 2 of Snohomish County Past Accepting new patients

Organizations & group practices 1

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.

NPI Registry JSON

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

{
    "created_epoch": "1147132800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1821047556",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12042 6TH AVE NW",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981774521",
            "telephone_number": "206-361-8408"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21601 76TH AVE W",
            "city": "EDMONDS",
            "state": "WA",
            "postal_code": "980267507",
            "telephone_number": "425-640-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "THEOBALD",
        "first_name": "MICHAEL",
        "middle_name": "ASHTON",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-09",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "WA",
            "license": "MD00011020",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Edmonds, WA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.