Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Brian Trethowan, MD

Individual provider Critical Care Medicine (Anesthesiology) Physician · NPI 1386188761

Brian Trethowan, MD is an Anesthesiology in Grand Rapids, Michigan. Qualified in 1998, 28 years ago. Practices with Spectrum Health Primary Care Partners, a 2,303-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
28
Licensed in
MI
In the registry since
2016
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

100 Michigan St NE Ste 8861
Grand Rapids, MI 49503-2560
Phone: (616) 391-1774
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Critical Care Medicine (Anesthesiology) Physician (primary) Taxonomy 207LC0200X · Licence 4301111216 (MI)

Record details

NPI number1386188761
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 5, 2016
Last updated in NPPESMarch 2, 2021
Certification dateMarch 2, 2021
Mailing address100 Michigan St Ne, Mc 845, Grand Rapids, MI 49503-2560

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Spectrum Health Primary Care Partners — 2303 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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