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

Dr. Michael John Trembowicz, DO

Individual provider Anesthesiology Physician · NPI 1366632457

Dr. Michael John Trembowicz, DO practises Anesthesiology in Grand Rapids, Michigan. Qualified in 2001, 25 years ago. Practices with Spectrum Health Primary Care Partners, a 2,303-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
25
Licensed in
MI
In the registry since
2007
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

100 Michigan St NE
Grand Rapids, MI 49503-2560
Phone: (616) 391-1510
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 5101017370 (MI)

Record details

NPI number1366632457
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 26, 2007
Last updated in NPPESFebruary 27, 2026
Certification dateFebruary 27, 2026

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Spectrum Health Primary Care Partners — 2303 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients90
Services billed 120 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. Those with a page here are linked.

  • Spectrum Health Hospital · Grand Rapids, MI · listed as Spectrum Health Hospital
  • Trinity Health Muskegon Hospital Hospital · Muskegon, MI

Colleagues at Spectrum Health Primary Care Partners

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2303 clinicians in the practice; 12 are shown here.

Other providers in Grand Rapids