Keith Hershel Peterson, MD
Internal Medicine Physician · Duluth, MN
Keith Hershel Peterson, MD is an internal medicine physician with a practice address in Duluth, Minnesota, and NPI 1689718637, issued on Feb 15, 2007. Check the license (Minnesota 49588, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Keith Hershel Peterson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 49588 MN
62724-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 400 E 3RD St, Duluth, MN 55805
- Phone
- (218) 786-4020
- Enumerated
- Feb 15, 2007
- Record last updated
- Dec 2, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicaid ID
- 1689718637 MN
- Medicare enrollment
- Enrolled (PECOS I20080910000551); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 2004
- 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 Keith Hershel Peterson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 49588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
90 Medicare Part D claims for 32 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Trazodone Hcl13 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 one group practice
- The Duluth Clinic LtdDuluth, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Keith Hershel Peterson among 2,632 internal medicine physician records in Minnesota
Keith Hershel Peterson, 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 2007, is newer than 42% of them.
- NPI issued2007 · 42% of these records are older, 52% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2004 · median 2008 among the 1,700 with a school on file
- Record last updated2015 · 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
- Margaret Chen, MDDuluth, MN 558051578678272
- Christine DepenthalDuluth, MN 558051366553067
- Josefino DiazDuluth, MN 558051891723599
- Peter Good, MDDuluth, MN 558051417913500
- Okechukwu IwuDuluth, MN 558051740356351
- Melanie JohnsonDuluth, MN 558051528132495
Common questions
What is Keith Hershel Peterson, MD's NPI number?
Keith Hershel Peterson, MD's National Provider Identifier (NPI) is 1689718637, issued on Feb 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Keith Hershel Peterson, MD located?
The NPPES record lists a practice address at 400 E 3RD St, Duluth, MN, 55805. Phone: (218) 786-4020. Providers update this record themselves, so call before visiting.
How can I verify Keith Hershel Peterson, MD's license?
NPPES lists Minnesota license number 49588, 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 Keith Hershel Peterson, MD prescribe under Medicare Part D?
In 2024, Keith Hershel Peterson, MD had 90 Medicare Part D claims for 32 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.