John Thore Duhn, DO
Family Medicine Physician · Grand Rapids, MI
John Thore Duhn, DO is a family medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1821043613, issued on May 23, 2006. Check the license (Michigan 5101015743, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- John Thore Duhn
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 5101015743 MI
Self-reported in NPPES; status is on the state search - Practice location
- 3355 Eagle Park Dr NE Ste 103, Grand Rapids, MI 49525
- Phone
- (616) 942-7400
- Enumerated
- May 23, 2006
- Record last updated
- Apr 23, 2024
- Medicare enrollment
- Enrolled (PECOS I20050209000292); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,013 in Michigan → Look up another NPI →
Also registered at 3355 Eagle Park Dr NE Ste 103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Davies, M.D.Internal Medicine Physician1376807933
- Rhiannon Freiberg, NPPhysician Assistant1801289459
- Michelle Gingrich, NP-CFamily Nurse Practitioner1356861801
- Jeffery Libra, M.D.Family Medicine Physician1619009826
- Nancy Marthakis, DOInternal Medicine Physician1780946236
- Chia-Hui Neilly, DNP, FNP-BC,PMHNP-BCFamily Nurse Practitioner1447744727
Verify John Thore Duhn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101015743Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average family medicine physician in 2024
1,187 Medicare Part D claims for 230 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 67 claims were for opioids.
Most prescribed
- Atorvastatin Calcium82 claims
- Levothyroxine Sodium68 claims
- Gabapentin47 claims
- Omeprazole44 claims
- Amlodipine Besylate40 claims
- Hydrocodone-Acetaminophen37 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: $15.47
1 payment: food and beverage; the largest payer was Scpharmaceuticals Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Vpa PCOkemos, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Thore Duhn among 6,013 family medicine physician records in Michigan
John Thore Duhn, DO is one of 6,013 family medicine physician records with a practice address in Michigan. 75% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 56% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2003 · median 2008 among the 3,493 with a school on file
- Record last updated2024 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
317 family medicine physician records list a practice address in Grand Rapids
They are 317 of the 18,005 NPPES records with a practice address in Grand Rapids, and 6,013 family medicine physician records in Michigan.
All 6,013 in Michigan → Every provider in Grand Rapids → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- William Ahrens, MDGrand Rapids, MI 495251417994088
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- Matthew Boutell, MDGrand Rapids, MI 495251043210818
- Jill Bultje, MDGrand Rapids, MI 495251568414241
- Mario Cesario, MDGrand Rapids, MI 495251124093679
- Diane Culik, MDGrand Rapids, MI 495251053378034
- Saleh Dyke, MDGrand Rapids, MI 495251477511145
- Paul Elsen, MDGrand Rapids, MI 495251073567178
Common questions
What is John Thore Duhn, DO's NPI number?
John Thore Duhn, DO's National Provider Identifier (NPI) is 1821043613, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Thore Duhn, DO located?
The NPPES record lists a practice address at 3355 Eagle Park Dr NE Ste 103, Grand Rapids, MI, 49525. Phone: (616) 942-7400. Providers update this record themselves, so call before visiting.
How can I verify John Thore Duhn, DO's license?
NPPES lists Michigan license number 5101015743, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Thore Duhn, DO prescribe under Medicare Part D?
In 2024, John Thore Duhn, DO had 1,187 Medicare Part D claims for 230 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.