James K. Mackay, MD
Hospitalist Physician · Kalamazoo, MI
James K. Mackay, MD is a hospitalist physician with a practice address in Kalamazoo, Michigan, and NPI 1982684320, issued on Jan 20, 2006. Check the license (Michigan 4301077948, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- James K. Mackay
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 4301077948 MI
Self-reported in NPPES; status is on the state search - Practice location
- 601 John St, Kalamazoo, MI 49007
- Phone
- (269) 341-8481
- Enumerated
- Jan 20, 2006
- Record last updated
- Nov 27, 2023
- Fax
- (269) 341-7781
- Medicaid ID
- 4787466 MI
- Medicare enrollment
- Enrolled (PECOS I20041124000307); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 272 in Michigan → Look up another NPI →
Also registered at 601 John St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James K. Mackay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301077948Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average hospitalist physician in 2024
514 Medicare Part D claims for 144 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Eliquis63 claims
- Atorvastatin Calcium62 claims
- Clopidogrel35 claims
- Metoprolol Succinate31 claims
- Amlodipine Besylate25 claims
- Metoprolol Tartrate21 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $29.94
2 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 7,324 providers of this specialty with any payment received $494.84 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 affiliation
- Bronson Methodist HospitalPortage, MI · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
James K. Mackay among 272 hospitalist physician records in Michigan
James K. Mackay, MD is one of 272 hospitalist physician records with a practice address in Michigan. 90% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 69% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 85% of these records are
- Graduated1999 · median 2009 among the 229 with a school on file
- Record last updated2023 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Michigan
There are 272 hospitalist physician records in Michigan.
All 272 in Michigan → Every provider in Kalamazoo → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Wajid Khan, MDKalamazoo, MI 490071649208448
- Rajeev Reddy Malireddy, MDKalamazoo, MI 490071467884775
- Camelia Merati, DOKalamazoo, MI 490071467474312
- Tamim Salman, MDKalamazoo, MI 490071508846940
- Monica Sciuca, MDKalamazoo, MI 490071730169335
- Shaza Zayzafoon-Mosier, MDKalamazoo, MI 490071255304358
- Harshita Agrawal, MDKalamazoo, MI 490081538853064
- Mohammad Shehadeh, MDBattle, MI 490171639223688
Common questions
What is James K. Mackay, MD's NPI number?
James K. Mackay, MD's National Provider Identifier (NPI) is 1982684320, issued on Jan 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James K. Mackay, MD located?
The NPPES record lists a practice address at 601 John St, Kalamazoo, MI, 49007. Phone: (269) 341-8481. Providers update this record themselves, so call before visiting.
How can I verify James K. Mackay, MD's license?
NPPES lists Michigan license number 4301077948, 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 K. Mackay, MD prescribe under Medicare Part D?
In 2024, James K. Mackay, MD had 514 Medicare Part D claims for 144 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is James K. Mackay, MD's MIPS final score?
The 2023 MIPS final score is 84.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.