Derek Conner Westman, DO
Internal Medicine Physician · Saint Joseph, MI
Derek Conner Westman, DO is an internal medicine physician with a practice address in Saint Joseph, Michigan, and NPI 1982283065, issued on Apr 6, 2021. Check the license (Michigan 5101027971, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Derek Conner Westman
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 5101027971 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1234 Napier Ave, Saint Joseph, MI 49085
- Phone
- (269) 982-4941
- Enumerated
- Apr 6, 2021
- Record last updated
- Aug 2, 2024
- Medicare enrollment
- Enrolled (PECOS I20240701000180); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1234 Napier Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Allen, MDCritical Care Medicine (Internal Medicine) Physician1073540647
Verify Derek Conner Westman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101027971Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
333 Medicare Part D claims for 97 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 13 claims were for opioids.
Most prescribed
- Albuterol Sulfate Hfa19 claims
- Pantoprazole Sodium15 claims
- Metformin Hcl14 claims
- Prednisone13 claims
- Amlodipine Besylate12 claims
- Atorvastatin Calcium11 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: $130.23
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Lakeland Medical PracticesSaint Joseph, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Conner Westman among 5,735 internal medicine physician records in Michigan
Derek Conner Westman, DO is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 83% of them.
- NPI issued2021 · 83% of these records are older, 13% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2021 · median 2006 among the 3,564 with a school on file
- Record last updated2024 · 54% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
49 internal medicine physician records list a practice address in Saint Joseph
They are 49 of the 1,038 NPPES records with a practice address in Saint Joseph, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Saint Joseph → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kathleen Andries, MDSt Joseph, MI 490851588623276
- Sharon Deskins, M.D.Saint Joseph, MI 490851275592537
- Samraja Emerson, MDSaint Joseph, MI 490851235165093
- John Froggatt, MDSaint Joseph, MI 490851588691091
- John Gosling, MDSaint Joseph, MI 490851851387302
- Ewanah Johnson, MDSaint Joseph, MI 490851841282456
- Hany Mesiha, MDSaint Joseph, MI 490851003034455
- Sherrell O'Donnell, D.O.Saint Joseph, MI 490851699771725
Common questions
What is Derek Conner Westman, DO's NPI number?
Derek Conner Westman, DO's National Provider Identifier (NPI) is 1982283065, issued on Apr 6, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Derek Conner Westman, DO located?
The NPPES record lists a practice address at 1234 Napier Ave, Saint Joseph, MI, 49085. Phone: (269) 982-4941. Providers update this record themselves, so call before visiting.
How can I verify Derek Conner Westman, DO's license?
NPPES lists Michigan license number 5101027971, 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 Derek Conner Westman, DO prescribe under Medicare Part D?
In 2024, Derek Conner Westman, DO had 333 Medicare Part D claims for 97 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.