Mark Thomas Ash, DDS
Oral and Maxillofacial Surgery (Dentist) · Duluth, MN
Mark Thomas Ash, DDS is an oral and maxillofacial surgery (dentist) with a practice address in Duluth, Minnesota, and NPI 1164045738, issued on May 18, 2020. Check the license (Minnesota D14360, as entered in NPPES) with the Minnesota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Thomas Ash
- Credential
- DDS
- Primary taxonomy
- Oral and Maxillofacial Surgery (Dentist) 1223S0112X
- License numbers
- D14360 MN
6001917-15 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3617 W Arrowhead RD, Duluth, MN 55811
- Phone
- (218) 722-8377
- Enumerated
- May 18, 2020
- Record last updated
- Aug 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20250807001932); may accept Medicare assignment
- Medical or professional school
- University Of Michigan School Of Dentistry, 2020
- Entity
- Type 1 · individual
8 nearest oral and maxillofacial surgery (dentist) records → All 191 in Minnesota → Look up another NPI →
Also registered at 3617 W Arrowhead RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Babst, DDSOral and Maxillofacial Surgery (Dentist)1679623029
- Melanie Bluth, DDSOrthodontics and Dentofacial Orthopedics Dentistry1215598784
- Kirstin CarlsonOrthodontics and Dentofacial Orthopedics Dentistry1760716773
- Luke CarlsonOrthodontics and Dentofacial Orthopedics Dentistry1740514751
- Marty Espe, DDS, MDOral and Maxillofacial Surgery (Dentist)1760532139
- Benjamin Heggestad, D.D.S., MDOral & Maxillofacial Surgery (D.M.D.)1598146763
Verify Mark Thomas Ash in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Minnesota board licenses this profession
Search for license D14360Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average oral and maxillofacial surgery (dentist) in 2024
108 Medicare Part D claims for 42 beneficiaries, against an average of 406 among the 5,870 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Chlorhexidine Gluconate30 claims
- Oxycodone Hcl16 claims
- Amoxicillin-Clavulanate Potass12 claims
- Ondansetron Odt12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $264.69
7 payments; by number, the most common kind was food and beverage; the largest payer was DePuy Synthes Sales Inc. The 4,075 providers of this specialty with any payment received $1,077.58 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northern Oral And Maxillofacial Surgeons PADuluth, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Thomas Ash among 191 oral and maxillofacial surgery (dentist) records in Minnesota
Mark Thomas Ash, DDS is one of 191 oral and maxillofacial surgery (dentist) records with a practice address in Minnesota. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 84% of them.
- NPI issued2020 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 30% of these records are
- Graduated2020 · median 2008 among the 58 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223S0112X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Oral and Maxillofacial Surgery (Dentist) providers in Minnesota
There are 191 oral and maxillofacial surgery (dentist) records in Minnesota.
All 191 in Minnesota → Every provider in Duluth → Oral and Maxillofacial Surgery (Dentist) nationwide →
The 8 oral and maxillofacial surgery (dentist) records with the nearest ZIP codes
- Charles Babst, DDSDuluth, MN 558111679623029
- Marty Espe, DDS, MDDuluth, MN 558111760532139
- Peter Mayer, DDS,MDDuluth, MN 558111104976570
- Duncan Puffer, DDSDuluth, MN 558111073663449
- John Cornell, DDSDuluth, MN 558051801981444
- Paul Hodapp, DDSDuluth, MN 558051750475299
- Joby Jaberi, DDSDuluth, MN 558051407059009
- Eric Scotland, DDSDuluth, MN 558051679793244
Common questions
What is Mark Thomas Ash, DDS's NPI number?
Mark Thomas Ash, DDS's National Provider Identifier (NPI) is 1164045738, issued on May 18, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mark Thomas Ash, DDS located?
The NPPES record lists a practice address at 3617 W Arrowhead RD, Duluth, MN, 55811. Phone: (218) 722-8377. Providers update this record themselves, so call before visiting.
How can I verify Mark Thomas Ash, DDS's license?
NPPES lists Minnesota license number D14360, as entered by the provider. Search the Minnesota board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Thomas Ash, DDS prescribe under Medicare Part D?
In 2024, Mark Thomas Ash, DDS had 108 Medicare Part D claims for 42 beneficiaries; the average among oral and maxillofacial surgery (dentist) prescribers was 406. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.