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

Michael John Essenmacher, DO

Individual provider Internal Medicine Physician · NPI 1457845075

Michael John Essenmacher, DO practises Internal Medicine in Grand Rapids, Michigan. Graduated from Michigan State University College of Osteopathic Medicine in 2018, 8 years ago. Practices with Advantage Health/Saint Mary's Medical Group, a 494-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
8
Trained at
Michigan State University College of Osteopathic Medicine
Licensed in
MI
In the registry since
2018
Specialties on file
3
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

200 Jefferson Ave SE
Grand Rapids, MI 49503-4502
Phone: (616) 685-6919
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 5151012747 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 5101023957 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 5151012747 (MI)

Record details

NPI number1457845075
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 18, 2018
Last updated in NPPESApril 22, 2022
Certification dateApril 22, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2018 (8 years in practice)
Group practice Advantage Health/Saint Mary'S Medical Group — 494 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 patients208
Services billed 386 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Advantage Health/Saint Mary's Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 494 clinicians in the practice; 12 are shown here.

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