James C. Mackenzie, MD
Internal Medicine Physician · Troy, MI
James C. Mackenzie, MD is an internal medicine physician with a practice address in Troy, Michigan, and NPI 1548251168, issued on Nov 2, 2005. Check the license (Michigan 4301030901, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- James C. Mackenzie
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301030901 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1380 Coolidge Hwy, Troy, MI 48084
- Phone
- (248) 288-4000
- Enumerated
- Nov 2, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (248) 288-3900
- Medicare enrollment
- Enrolled (PECOS I20041013000970); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1971
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1380 Coolidge Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James C. Mackenzie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301030901Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average internal medicine physician in 2024
5,138 Medicare Part D claims for 395 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 272 claims were for opioids.
Most prescribed
- Atorvastatin Calcium378 claims
- Lisinopril297 claims
- Levothyroxine Sodium222 claims
- Amlodipine Besylate220 claims
- Metformin Hcl175 claims
- Omeprazole156 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: $113.94
1 payment: food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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.
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 117 in Troy → All 5,735 in Michigan → Every provider in Troy →
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- Youssef Abbiss, D.O.Mount Clemens, MI1982991881
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Common questions
What is James C. Mackenzie, MD's NPI number?
James C. Mackenzie, MD's National Provider Identifier (NPI) is 1548251168, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James C. Mackenzie, MD located?
The NPPES record lists a practice address at 1380 Coolidge Hwy, Troy, MI, 48084. Phone: (248) 288-4000. Providers update this record themselves, so call before visiting.
How can I verify James C. Mackenzie, MD's license?
NPPES lists Michigan license number 4301030901, 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 James C. Mackenzie, MD prescribe under Medicare Part D?
In 2024, James C. Mackenzie, MD had 5,138 Medicare Part D claims for 395 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.