David Mitchell Thielen, DMD

Primary specialty

Public Health DentistryTaxonomy code 1223D0001X

License

1707 Issued in WY

Practice address

5081 East Second St
Casper, WY 82609

Phone

(307) 215-7337

NPI assigned

Jun 25, 2020

Last updated

Dec 4, 2025By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1593043200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1764806400000",
    "number": "1396362380",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5081 EAST SECOND ST",
            "city": "CASPER",
            "state": "WY",
            "postal_code": "82609",
            "telephone_number": "307-215-7337"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5081 EAST SECOND ST",
            "city": "CASPER",
            "state": "WY",
            "postal_code": "82609",
            "telephone_number": "307-215-7337"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "THIELEN",
        "first_name": "DAVID",
        "middle_name": "MITCHELL",
        "name_prefix": "Dr.",
        "credential": "DMD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2020-06-25",
        "last_updated": "2025-12-04",
        "certification_date": "2025-12-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223D0001X",
            "taxonomy_group": "",
            "desc": "Dentist, Dental Public Health",
            "state": "WY",
            "license": "1707",
            "primary": true
        },
        {
            "code": "1223G0001X",
            "taxonomy_group": "",
            "desc": "Dentist, General Practice",
            "state": "IA",
            "license": "DDS-09938",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "IA",
            "license": "RES-30593",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• The Shriver Therapy Group, Inc.
• The Space Within LLC
• Therapy Solutions, Inc.
• Margaret Thew
• Thielen Dental LLC
• Janet Ann Thies, LPC
• Angela C. Thomas
• Cynthia Guy Thomas, MSW, PCSW
• Debra Louise Thomas
• Heather Paige Thomas, MA, NCC, LPC

• Public Health Dentistry in Casper, WY
• Providers in Casper, WY by specialty
• Public Health Dentistry in Wyoming

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 4, 2025; 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.