Trisha Zylstra, MD
NPI 1134223779 · Obstetrics & Gynecology Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Trisha Zylstra, MD is a Obstetrics & Gynecology Physician provider in Grand Rapids, MI (NPI 1134223779).
Provider details
- NPI number
- 1134223779
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301080272 (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
19 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 41 | 22 |
| Clobetasol Propionate | 23 | 13 |
| Metronidazole | 13 | — |
| Estradiolbrand: Estradiol (twice Weekly) | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-12
- Last updated
- 2020-02-24
- Certified
- 2020-02-24
Frequently asked questions
- What is Trisha Zylstra's NPI number?
- Trisha Zylstra's National Provider Identifier (NPI) is 1134223779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Trisha Zylstra's specialty?
- Trisha Zylstra is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Trisha Zylstra located?
- Trisha Zylstra's practice location on file with NPPES is 1471 E Beltline Ave Ne Ste 101, Grand Rapids, MI 49525-4548.
- What is Trisha Zylstra's phone number?
- The practice phone number listed in the NPPES registry for Trisha Zylstra is (616) 685-8600.
- Does Trisha Zylstra accept Medicare?
- Trisha Zylstra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Trisha Zylstra's NPI active?
- Yes — Trisha Zylstra's NPI (1134223779) is active in the NPPES registry as of the last update on 2020-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.