MARK THOMAS ASH DDS
NPI 1164045738
Dentist - Oral and Maxillofacial Surgery in Duluth, MN

Q: What is Mark Ash's NPI number?

The NPI number for Mark Ash is 1164045738. It was assigned to this individual provider in the NPPES registry on May 18, 2020.

Q: What is Mark Ash's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.

Q: When was this NPI record last updated?

The NPPES record for Mark Ash was last updated on August 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 18, 2020PECOS Enrolled

3617 W ARROWHEAD RD, DULUTH, MN 55811(218) 722-8377 Get Directions Write a Review

NPPES record last updated: August 22, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 6, 2025, May 18, 2020 (2 updates tracked since 2020).

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About Mark Thomas Ash Dds NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK THOMAS ASH DDS (NPI 1164045738) is an individual oral and maxillofacial surgery provider in Duluth, Minnesota, licensed in Minnesota (D14360) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS, is affiliated with Essentia Health St Mary's Medical Center, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1164045738

Entity TypeIndividualMale

Primary Taxonomy1223S0112X

Provider Legal NameMARK THOMAS ASHCredential: DDS

Location Address3617 W ARROWHEAD RDDuluth, MN 55811-4132

Mailing Address3617 W Arrowhead RdDuluth, MN 55811-4132 · (630) 843-1936

Phone(218) 722-8377

Sole ProprietorYes

Medical School CMSUniversity Of Michigan School Of DentistryGraduated 2020

Enumeration DateMay 18, 2020

Last NPPES UpdateAugust 22, 20252 updates tracked since enumeration

NPPES CertifiedAugust 22, 2025

✔ NPI 1164045738 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Oral and Maxillofacial SurgeryDental Providers

Taxonomy Code1223S0112X

Licenses✔ Licensed in MN · D14360✔ Licensed in WI · 6001917-15

Definition

An oral and maxillofacial surgery dentist specialized in the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region.

3617 W ARROWHEAD RD, Duluth, MN 55811

Open in Google Maps ↗

Secondary Practice Locations 3

Location 1515 Delaware St SEMinneapolis, MN 55455-0357 · Phone (612) 301-2233

Location 23899 Highway 73 Ste 5-6Hibbing, MN 55746-8348 · Phone (218) 293-0691

Location 3503 Belknap StSuperior, WI 54880-2932 · Phone (715) 564-4081

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Delta Dental of Wisconsin, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Thomas Ash Dds is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1951727981

PECOS Enrollment IDI20250807001932, I20250822000663

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Essentia Health St Mary's Medical Center

Acute Care Hospitals · Duluth, MN

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number240002

Location402 East Second StreetDuluth, MN 55805 · St. Louis County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 55811 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$85.82 typical visit price

range $56.00 – $168.28

Typical copayment $21.45 (range $14.00 – $42.07)

Most-billed visit code 99203

Established Patient

$69.74 typical visit price

range $18.32 – $138.04

Typical copayment $17.43 (range $4.58 – $34.51)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 13

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DUNCAN R PUFFER DDS

Dentist (Oral and Maxillofacial Surgery)

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-8377

PETER J MAYER DDS,MD

Dentist (Oral and Maxillofacial Surgery)

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-8377

MELANIE ANN BLUTH DDS

Dentist (Orthodontics and Dentofacial Orthopedics)

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-4484

DR. TIMOTHY LEE MORSE D.D.S.

Dentist

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-8377

ARROWHEAD ORTHODONTICS PC

Dentist (Orthodontics and Dentofacial Orthopedics)

3617 W ARROWHEAD RD, SUITE 200
DULUTH, MN 55811

St. Louis County (218) 722-4484

NORTHERN ORAL & MAXILLOFACIAL SURGEONS, PA

Dentist (Oral and Maxillofacial Surgery)

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-8377

BRIEANNA LISE NEWTON DDS, MS

Dentist

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-4484

DR. BENJAMIN HEGGESTAD D.D.S., MD

Oral & Maxillofacial Surgery

3617 W ARROWHEAD RD
DULUTH, MN 55811

St. Louis County (218) 722-8377

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Ash's NPI number?

The NPI number for Mark Ash is 1164045738. It was assigned to this individual provider in the NPPES registry on May 18, 2020.

Where is Mark Ash located?

Mark Ash practices at 3617 W Arrowhead Rd, Duluth, MN 55811. The listed phone number is (218) 722-8377.

What is Mark Ash's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.

Is Mark Ash enrolled in Medicare?

Yes. Mark Ash is registered in the Medicare PECOS enrollment system.

What insurance does Mark Ash accept?

Health plans from Delta Dental of Wisconsin, Inc. list Mark Ash as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark Ash affiliated with any hospitals?

According to CMS data, Mark Ash is affiliated with Essentia Health St Mary's Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Ash was last updated on August 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.