Justin Triemstra, M.D.
NPI 1588002661 · Pediatrics Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Triemstra, M.D. is a Pediatrics Physician provider in Grand Rapids, MI (NPI 1588002661).
Provider details
- NPI number
- 1588002661
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301111989 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-11
- Last updated
- 2025-06-17
- Certified
- 2025-06-17
Frequently asked questions
- What is Justin Triemstra's NPI number?
- Justin Triemstra's National Provider Identifier (NPI) is 1588002661, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Triemstra's specialty?
- Justin Triemstra is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Triemstra located?
- Justin Triemstra's practice location on file with NPPES is 275 Michigan St Ne, Grand Rapids, MI 49503-2531.
- What is Justin Triemstra's phone number?
- The practice phone number listed in the NPPES registry for Justin Triemstra is (616) 391-2123.
- Does Justin Triemstra accept Medicare?
- Justin Triemstra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Triemstra's NPI active?
- Yes — Justin Triemstra's NPI (1588002661) is active in the NPPES registry as of the last update on 2025-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.