Mark Thomas Ash, DDS

Primary specialty

Oral and Maxillofacial Surgery (Dentist)Taxonomy code 1223S0112X

License

D14360 Issued in MN

Practice address

3617 W Arrowhead Rd
Duluth, MN 55811-4132

Phone

(218) 722-8377

NPI assigned

May 18, 2020

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MN, WI2 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

Oral Surgery

Education

University of Michigan School of Dentistry, 2020

Medicare assignment

May accept Medicare assignment

Group practices

Northern Oral and Maxillofacial Surgeons PAGroup PAC ID 3072535863, shared by 2 NPIs, 7 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Essentia Health St Mary'S Medical Center Hospital, Duluth, MN, CCN 240002

Medicare enrollment (NPD)

Enrolled

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.

• Northern Oral & Maxillofacial Surgeons, PA

  • Oral and Maxillofacial Surgery (Dentist)
  • Duluth, MN
  • NPI 1457401820
  Medicare reassignment NPD
• Northern Oral & Maxillofacial Surgeons, PA

  • Oral and Maxillofacial Surgery (Dentist)
  • Superior, WI
  • NPI 1013068691
  Medicare reassignment NPD
• Northern Oral & Maxillofacial Surgeons, PA

  • Oral and Maxillofacial Surgery (Dentist)
  • Hibbing, MN
  • NPI 1588715163
  NPD

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

• St Marys Medical Center

  • General Acute Care Hospital
  • Duluth, MN
  • NPI 1457393035
  Care Compare affiliation
• St. Marys Medical Center

  • Air Ambulance
  • Duluth, MN
  • NPI 1841359478

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1589760000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755820800000",
    "number": "1164045738",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3617 W ARROWHEAD RD",
            "city": "DULUTH",
            "state": "MN",
            "postal_code": "558114132",
            "telephone_number": "630-843-1936"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3617 W ARROWHEAD RD",
            "city": "DULUTH",
            "state": "MN",
            "postal_code": "558114132",
            "telephone_number": "218-722-8377"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "515 Delaware St SE",
            "address_purpose": "LOCATION",
            "city": "Minneapolis",
            "state": "MN",
            "postal_code": "554550357",
            "country_code": "US",
            "telephone_number": "612-301-2233",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3899 Highway 73 Ste 5-6",
            "address_purpose": "LOCATION",
            "city": "Hibbing",
            "state": "MN",
            "postal_code": "557468348",
            "country_code": "US",
            "telephone_number": "218-293-0691",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "503 Belknap St",
            "address_purpose": "LOCATION",
            "city": "Superior",
            "state": "WI",
            "postal_code": "548802932",
            "country_code": "US",
            "telephone_number": "715-564-4081",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ASH",
        "first_name": "MARK",
        "middle_name": "THOMAS",
        "credential": "DDS",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2020-05-18",
        "last_updated": "2025-08-22",
        "certification_date": "2025-08-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223S0112X",
            "taxonomy_group": "",
            "desc": "Dentist, Oral and Maxillofacial Surgery",
            "state": "WI",
            "license": "6001917-15",
            "primary": false
        },
        {
            "code": "1223S0112X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Dentist, Oral and Maxillofacial Surgery",
            "state": "MN",
            "license": "D14360",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lisa Anne Arvold, M.D.
• Nils D Arvold, M.D.
• David Allen Arzouman, M.D.
• Michael Dean Asbell, MD
• Gregory Scott Ash, D.C.
• Susan Elizabeth Ash
• Alyssa Jean Ashburn, BCBA, LBA, QSP
• Rachel Gabrielle Ashford, LICSW
• Zayla Asquith-Heinz, LGSW
• Sarah Beth Astorga, M.D.

• Oral and Maxillofacial Surgery (Dentist) in Duluth, MN
• Providers in Duluth, MN by specialty
• Oral and Maxillofacial Surgery (Dentist) in Minnesota

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 22, 2025; 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.