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

Dr. Justin D Triemstra, MD

Individual provider Pediatrics Physician · NPI 1588002661

Dr. Justin D Triemstra, MD is a Pediatric Medicine in Grand Rapids, Michigan. Graduated from Loyola University of Chicago, Stritch School of Medicine in 2013, 13 years ago. Practices with Spectrum Health Primary Care Partners, a 2,303-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
13
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
MI
In the registry since
2013
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

275 Michigan St NE
Grand Rapids, MI 49503-2531
Phone: (616) 391-2123
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence 4301111989 (MI)

Record details

NPI number1588002661
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 11, 2013
Last updated in NPPESJune 17, 2025
Certification dateJune 17, 2025

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Spectrum Health Primary Care Partners — 2303 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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