Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mark Thomas Ash, DDS

Individual provider Oral and Maxillofacial Surgery (Dentist) · NPI 1164045738

Mark Thomas Ash, DDS is an Oral Surgery in Duluth, Minnesota. Graduated from University of Michigan School of Dentistry in 2020, 6 years ago. Practices with Northern Oral and Maxillofacial Surgeons PA, a 7-clinician group and works from 4 locations. Licensed in Minnesota and Wisconsin.

Years since qualifying
6
Trained at
University of Michigan School of Dentistry
Licensed in
MN, WI
In the registry since
2020
Specialties on file
2
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Practice location Address checks out

3617 W Arrowhead Rd
Duluth, MN 55811-4132
Phone: (218) 722-8377
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 3899 Highway 73 Ste 5-6, Hibbing, MN 55746-8348 — (218) 293-0691
  • 515 Delaware St Se, Minneapolis, MN 55455-0357 — (612) 301-2233
  • 503 Belknap St, Superior, WI 54880-2932 — (715) 564-4081

Specialties & licences

Oral and Maxillofacial Surgery (Dentist) (primary) Taxonomy 1223S0112X · Licence D14360 (MN)
Oral and Maxillofacial Surgery (Dentist) Taxonomy 1223S0112X · Licence 6001917-15 (WI)

Record details

NPI number1164045738
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedMay 18, 2020
Last updated in NPPESAugust 22, 2025
Certification dateAugust 22, 2025
Mailing address3617 W Arrowhead Rd, Duluth, MN 55811-4132

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORAL SURGERY
Medical schoolUNIVERSITY OF MICHIGAN SCHOOL OF DENTISTRY
Graduated 2020 (6 years in practice)
Group practice Northern Oral And Maxillofacial Surgeons Pa — 7 clinicians
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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