Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark Adam Brown, MD

Individual provider Internal Medicine Physician · NPI 1790814820

Mark Adam Brown, MD practises Internal Medicine in Kalamazoo, Michigan. Qualified in 2003, 23 years ago. Practices with Osh Mi Physicians Group, PC, a 157-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
23
Licensed in
MI
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1663 S Westnedge Ave
Kalamazoo, MI 49008-1928
Phone: (269) 694-3001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 5500 Armstrong Rd, Battle Creek, MI 49037-7314 — (269) 966-5600
  • 2201 S Getty St, Muskegon, MI 49444-1207 — (231) 739-9315

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4301082967 (MI)

Record details

NPI number1790814820
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 5, 2007
Last updated in NPPESJune 26, 2024
Certification dateJune 26, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Osh Mi Physicians Group, Pc — 157 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients25
Services billed 49 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $18 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Osh Mi Physicians Group, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 157 clinicians in the practice; 12 are shown here.

Other providers in Kalamazoo