Thomas A Oas, MD

Primary specialty

Occupational Medicine PhysicianTaxonomy code 2083X0100X

License

21058 Issued in MN

Practice address

710 Division St S
Northfield, MN 55057-2468

Phone

(507) 646-1494

NPI assigned

May 11, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1147305600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1104876010",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "710 DIVISION ST S",
            "city": "NORTHFIELD",
            "state": "MN",
            "postal_code": "550572468",
            "telephone_number": "507-646-1494"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "710 DIVISION ST S",
            "city": "NORTHFIELD",
            "state": "MN",
            "postal_code": "550572468",
            "telephone_number": "507-646-1494"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OAS",
        "first_name": "THOMAS",
        "middle_name": "A",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-11",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2083X0100X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Occupational Medicine",
            "state": "MN",
            "license": "21058",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Northfield School of Arts and Technology (Artech Charter School)
• Northfield Urgent Care LLC
• Nutrition Proportion
• Patrick William O'Neill, O.D.
• Madalyn Sue O'Reilly, OTR/L
• Old Growth Healing LLC (Old Growth Healing)
• Oliinc MGMT & Consulting LLC (MKR Medical)
• Sarah Jo Olin, MOTR/L
• Douglas V Olmanson, MD
• Daniel F Olsen, CRNA

• Occupational Medicine Physician in Northfield, MN
• Providers in Northfield, MN by specialty
• Occupational Medicine Physician in Minnesota

• 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.