Margret Duncan, MD
Family Medicine Physician · Holland, MI
Margret Duncan, MD is a family medicine physician with a practice address in Holland, Michigan, and NPI 1114940434, issued on Jul 26, 2006. Check the license (Michigan 4301070620, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Margret Duncan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4301070620 MI
Self-reported in NPPES; status is on the state search - Practice location
- 336 S River Ave, Holland, MI 49423
- Phone
- (616) 394-3788
- Enumerated
- Jul 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20041104000095); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,013 in Michigan → Look up another NPI →
Also registered at 336 S River Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Arendshorst, MDOphthalmology Physician1902009368
- Kristine Aulepp, DOFamily Medicine Physician1285655522
- David Bosscher, D.O.Family Medicine Physician1417950270
- Phyllis Dehaan, NPNurse Practitioner1669693446
- Kathryn Kabelman, PA-CPhysician Assistant1063749695
- Jean Martin, NPNurse Practitioner1023254604
Verify Margret Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301070620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average family medicine physician in 2024
3,677 Medicare Part D claims for 183 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 245 claims were for opioids.
Most prescribed
- Atorvastatin Calcium207 claims
- Levothyroxine Sodium124 claims
- Fluticasone Propionate89 claims
- Hydrocodone-Acetaminophen88 claims
- Lisinopril85 claims
- Metformin Hcl75 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: $25.46
1 payment: food and beverage; the largest payer was ConvaTec 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
- Holland Community Health CenterHolland, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margret Duncan among 6,013 family medicine physician records in Michigan
Margret Duncan, MD 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
- Graduated1997 · median 2008 among the 3,493 with a school on file
- Record last updated2007 · 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).
53 family medicine physician records list a practice address in Holland
They are 53 of the 2,124 NPPES records with a practice address in Holland, and 6,013 family medicine physician records in Michigan.
All 6,013 in Michigan → Every provider in Holland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kristine Aulepp, DOHolland, MI 494231285655522
- Kristin Baier, M.D.Holland, MI 494231316236987
- William Bonzelaar, M.D.032354Holland, MI 494231053374165
- David Bosscher, D.O.Holland, MI 494231417950270
- Peter Christensen, DOHolland, MI 494231720007834
- Jack Derks, MDHolland, MI 494231134144413
- Russell Dykstra, M.D.Holland, MI 494231225091333
- Courtney Erickson-Adams, M.D.Holland, MI 494231093943771
Common questions
What is Margret Duncan, MD's NPI number?
Margret Duncan, MD's National Provider Identifier (NPI) is 1114940434, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margret Duncan, MD located?
The NPPES record lists a practice address at 336 S River Ave, Holland, MI, 49423. Phone: (616) 394-3788. Providers update this record themselves, so call before visiting.
How can I verify Margret Duncan, MD's license?
NPPES lists Michigan license number 4301070620, 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 Margret Duncan, MD prescribe under Medicare Part D?
In 2024, Margret Duncan, MD had 3,677 Medicare Part D claims for 183 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.