Michael J. Simpson, MD
Internal Medicine Physician · Troy, MI
Michael J. Simpson, MD is an internal medicine physician with a practice address in Troy, Michigan, and NPI 1245208321, issued on Mar 14, 2006. Check the license (Michigan 4301045180, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Michael J. Simpson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301045180 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4600 Investment Dr, Troy, MI 48098
- Phone
- (248) 267-5000
- Enumerated
- Mar 14, 2006
- Record last updated
- Feb 25, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (248) 267-5001
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 4600 Investment Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael J. Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301045180Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $32.72
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. 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.
Michael J. Simpson among 5,735 internal medicine physician records in Michigan
Michael J. Simpson, MD 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2008 · 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).
117 internal medicine physician records list a practice address in Troy
They are 117 of the 3,809 NPPES records with a practice address in Troy, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Troy → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rafael Barretto, D.O.Warren, MI 480981942202122
- Michelle Biddinger, MDTroy, MI 480981326015033
- John Bonema, MDTroy, MI 480981508833708
- Mudassir Daimee, M.D.Troy, MI 480981205838307
- James Henderson, MDTroy, MI 480981104895127
- Nadarajan Janakan, M.D.Troy, MI 480981134128812
- Michael Lumberg, MDTroy, MI 480981700853447
- Tony Nguyen, M.D.Troy, MI 480981396741567
Common questions
What is Michael J. Simpson, MD's NPI number?
Michael J. Simpson, MD's National Provider Identifier (NPI) is 1245208321, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Simpson, MD located?
The NPPES record lists a practice address at 4600 Investment Dr, Troy, MI, 48098. Phone: (248) 267-5000. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Simpson, MD's license?
NPPES lists Michigan license number 4301045180, 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.
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.