Margaret L. Chen, MD
Internal Medicine Physician · Duluth, MN
Margaret L. Chen, MD is an internal medicine physician with a practice address in Duluth, Minnesota, and NPI 1578678272, issued on Aug 20, 2006. Check the license (Minnesota 62371, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Margaret L. Chen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 62371 MN
1578678272 MN
Self-reported in NPPES; status is on the state search - Practice location
- 400 E 3RD St, Duluth, MN 55805
- Phone
- (218) 786-8364
- Enumerated
- Aug 20, 2006
- Record last updated
- Jul 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170705002254); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,632 in Minnesota → Look up another NPI →
Also registered at 400 E 3RD St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret L. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 62371Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average internal medicine physician in 2024
461 Medicare Part D claims for 161 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium32 claims
- Pantoprazole Sodium30 claims
- Metoprolol Succinate18 claims
- Clopidogrel15 claims
- Furosemide15 claims
- Prednisone15 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.
Bills Medicare through 2 group practices
- St Josephs Medical CenterBrainerd, MN
- The Duluth Clinic LtdVirginia, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret L. Chen among 2,632 internal medicine physician records in Minnesota
Margaret L. Chen, MD is one of 2,632 internal medicine physician records with a practice address in Minnesota. 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2003 · median 2008 among the 1,700 with a school on file
- Record last updated2019 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
63 internal medicine physician records list a practice address in Duluth
They are 63 of the 4,084 NPPES records with a practice address in Duluth, and 2,632 internal medicine physician records in Minnesota.
All 2,632 in Minnesota → Every provider in Duluth → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Arvold, M.D.Duluth, MN 558051790735504
- Robert BomanDuluth, MN 558051912943317
- Christine DepenthalDuluth, MN 558051366553067
- Josefino DiazDuluth, MN 558051891723599
- Peter Good, MDDuluth, MN 558051417913500
- Okechukwu IwuDuluth, MN 558051740356351
- Melanie JohnsonDuluth, MN 558051528132495
- Krisa Keute, MDDuluth, MN 558051629052477
Common questions
What is Margaret L. Chen, MD's NPI number?
Margaret L. Chen, MD's National Provider Identifier (NPI) is 1578678272, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret L. Chen, MD located?
The NPPES record lists a practice address at 400 E 3RD St, Duluth, MN, 55805. Phone: (218) 786-8364. Providers update this record themselves, so call before visiting.
How can I verify Margaret L. Chen, MD's license?
NPPES lists Minnesota license number 62371, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret L. Chen, MD prescribe under Medicare Part D?
In 2024, Margaret L. Chen, MD had 461 Medicare Part D claims for 161 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.