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

Jon Michael Carnahan, DO

Individual provider Hospitalist Physician · NPI 1568959609

Jon Michael Carnahan, DO practises Internal Medicine in Muskegon, Michigan. Graduated from Marian University College of Osteopathic Medicine in 2018, 8 years ago. Practices with Mercy Specialty Services, a 84-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
8
Trained at
Marian University College of Osteopathic Medicine
Licensed in
MI
In the registry since
2018
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1500 E Sherman Blvd
Muskegon, MI 49444-1849
Phone: (231) 672-3883
Fax: (231) 672-3973
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1675 Leahy St Ste 201a, Muskegon, MI 49442-5542 — (231) 672-7800

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 5101026325 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 5101026325 (MI)

Record details

NPI number1568959609
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 14, 2018
Last updated in NPPESApril 23, 2022
Certification dateApril 23, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHOSPITALIST
Medical schoolMARIAN UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2018 (8 years in practice)
Group practice Mercy Specialty Services — 84 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients192
Services billed 355 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 $55 3 payments · 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.

  • Mercy Health Lakeshore Campus Hospital · Shelby, MI
  • Trinity Health Muskegon Hospital Hospital · Muskegon, MI

Colleagues at Mercy Specialty Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 84 clinicians in the practice; 12 are shown here.

Other providers in Muskegon