Quick answers
- Which hospitals does Mark T. Ash work at?
- Medicare's official clinician data lists Mark T. Ash at 1 hospital: Essentia Health St Mary's Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark T. Ash see patients?
- Medicare's clinician data lists 3 practice locations, including Duluth, MN, Hibbing, MN and Superior, WI. Call before your visit to confirm the address.
- What is Mark T. Ash's specialty?
- Medicare lists Oral Surgery as the primary specialty.
- Does Mark T. Ash accept Medicare assignment?
- Medicare's clinician data says Mark T. Ash may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Mark T. Ash?
- (218) 722-8377, as listed in official Medicare / NPI Registry data.
- What is Mark T. Ash's NPI number?
- 1164045738. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark T. Ash works
Medicare's Facility Affiliation Data lists Mark T. Ash at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Essentia Health St Mary's Medical CenterDuluth, MN · Acute Care Hospital · CCN 240002
Practice locations
Addresses where Mark T. Ash is enrolled with Medicare (CMS data updated 2026-10-02).
- 3617 W Arrowhead RdDuluth, MN 55811 (218) 722‑8377
- 3899 Hwy 73, Suite 6Hibbing, MN 55746 (218) 293‑0691
- 503 Belknap StSuperior, WI 54880 (715) 564‑4081
Group practices
Medicare enrollment lists Mark T. Ash as a member of this group (CMS data updated 2026-10-02).
- Northern Oral and Maxillofacial Surgeons PA6 clinicians in the group
Specialties
- Oral Surgeryprimary
Other oral surgeons in Minnesota
Clinicians with the same Medicare primary specialty in Minnesota — not a recommendation.
Clinician information
| Credential | DDS |
|---|---|
| Medical school | University Of Michigan School Of Dentistry |
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1164045738 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians