Thomas Andrew Karn, DMD, MS
Endodontics · Plymouth, MN
Thomas Andrew Karn, DMD, MS is an endodontics with a practice address in Plymouth, Minnesota, and NPI 1578638946, issued on Nov 21, 2006. Check the license (Minnesota D11880, as entered in NPPES) with the Minnesota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thomas Andrew Karn
- Credential
- DMD, MS
- Primary taxonomy
- Endodontics 1223E0200X
- License number
- D11880 MN
Self-reported in NPPES; status is on the state search - Practice location
- 3401 Highway 169 N, Plymouth, MN 55441
- Phone
- (763) 559-0859
- Enumerated
- Nov 21, 2006
- Record last updated
- Dec 8, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (763) 559-4356
- Entity
- Type 1 · individual
8 nearest endodontics records → All 106 in Minnesota → Look up another NPI →
Also registered at 3401 Highway 169 N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Del Mastro, DMDEndodontics1659607653
- Mark Jensen, D.D.S.Endodontics1013082882
- Susan Penniston, DDSEndodontics1447323498
Verify Thomas Andrew Karn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Minnesota board licenses this profession
Search for license D11880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average endodontics in 2024
71 Medicare Part D claims for 62 beneficiaries, against an average of 121 among the 4,119 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin47 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: $10,000.00
1 payment: education; the largest payer was Sonendo Inc. The 2,057 providers of this specialty with any payment received $49,739.86 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.
Thomas Andrew Karn among 106 endodontics records in Minnesota
Thomas Andrew Karn, DMD, MS is one of 106 endodontics records with a practice address in Minnesota. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 52% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2015 · 81% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223E0200X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endodontics providers in Minnesota
There are 106 endodontics records in Minnesota.
All 106 in Minnesota → Every provider in Plymouth → Endodontics nationwide →
The 8 endodontics records with the nearest ZIP codes
- Alejandro Aguirre, D.D.S.,M.S.Plymouth, MN 554411609818186
- Matthew Del Mastro, DMDPlymouth, MN 554411659607653
- Mark Jensen, D.D.S.Plymouth, MN 554411013082882
- Susan Penniston, DDSPlymouth, MN 554411447323498
- Brent Rundquist, D.D.S. M.S.Plymouth, MN 554411083789572
- Mary Johnson, D.D.S.Edina, MN 554351033247432
- Levi Kinsey, DDS, MSEdina, MN 554351700975950
- Layton Mikkalson, DDSPlymouth, MN 554471497365134
Common questions
What is Thomas Andrew Karn, DMD, MS's NPI number?
Thomas Andrew Karn, DMD, MS's National Provider Identifier (NPI) is 1578638946, issued on Nov 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Andrew Karn, DMD, MS located?
The NPPES record lists a practice address at 3401 Highway 169 N, Plymouth, MN, 55441. Phone: (763) 559-0859. Providers update this record themselves, so call before visiting.
How can I verify Thomas Andrew Karn, DMD, MS's license?
NPPES lists Minnesota license number D11880, as entered by the provider. Search the Minnesota board that licenses this profession; the NPPES record confirms identity only.
How much does Thomas Andrew Karn, DMD, MS prescribe under Medicare Part D?
In 2024, Thomas Andrew Karn, DMD, MS had 71 Medicare Part D claims for 62 beneficiaries; the average among endodontics prescribers was 121. 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.