Derek Einhorn, M.D.
Internal Medicine Physician · Novi, MI
Derek Einhorn, M.D. is an internal medicine physician with a practice address in Novi, Michigan, and NPI 1801855762, issued on Mar 20, 2006. Check the license on the Michigan Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Derek Einhorn
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 39475 Lewis Drive, Novi, MI 48377
- Phone
- (248) 374-0502
- Enumerated
- Mar 20, 2006
- Entity
- Type 1 · individual
Also registered at 39475 Lewis Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donald Fisher, DDSDentist1104993559
- Daniel Rosenberg, MDPediatrics Physician1629038526
Verify Derek Einhorn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
29% more Medicare Part D claims than the average internal medicine physician in 2024
3,601 Medicare Part D claims for 409 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 82 claims were for opioids.
Most prescribed
- Atorvastatin Calcium245 claims
- Losartan Potassium149 claims
- Levothyroxine Sodium134 claims
- Mounjaro117 claims
- Omeprazole107 claims
- Rosuvastatin Calcium100 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: $1,379.62
78 payments, mostly food and beverage; the largest payer was Lilly USA, LLC. The 65,274 providers of this specialty with any payment received $2,536.66 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.
One hospital or facility affiliation
- Vmd Primary Providers Eastern Michigan PCFarmington, MI
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
46 internal medicine physician records list a Novi practice address
They are 46 of the 7,641 NPPES records with a Novi practice address, and 6,589 internal medicine physician records in Michigan.
All 46 in Novi → All 6,589 in Michigan → Every provider in Novi →
Other internal medicine physician records in Michigan
- Keith Aaronson, MDAnn Arbor, MI1144305301
- Tomas Abalo, M.D.Iron Mountain, MI1336199975
- Ali Abbas, M.D.Pontiac, MI1972167526
- Hawazin Abbas, MDAuburn Hills, MI1699020677
- Imran Abbasi, D.O.Warren, MI1427409887
- Ramzi Abbasi, MDSaginaw, MI1164270005
- Saadat Abbasi, MDKalamazoo, MI1912005596
- Shahzaman Abbasi, MDLansing, MI1376512111
- Youssef Abbiss, D.O.Mount Clemens, MI1982991881
- Joseph Abbo, MDYpsilanti, MI1982136503
Common questions
What is Derek Einhorn, M.D.'s NPI number?
Derek Einhorn, M.D.'s National Provider Identifier (NPI) is 1801855762, issued on Mar 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Derek Einhorn, M.D. located?
The NPPES record lists a practice address at 39475 Lewis Drive, Novi, MI, 48377. Phone: (248) 374-0502. Providers update this record themselves, so call before visiting.
How can I verify Derek Einhorn, M.D.'s license?
Search the Michigan Board of Medicine at https://www.michigan.gov/lara/bureau-list/bpl/health/hp-lic-health-prof/medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Derek Einhorn, M.D. prescribe under Medicare Part D?
In 2024, Derek Einhorn, M.D. had 3,601 Medicare Part D claims for 409 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.