Peter Zadvinskis, M.D.
NPI 1043381353 · Rheumatology Physician · Grand Rapids, MI
Peter Zadvinskis, M.D. is a Rheumatology Physician provider in Grand Rapids, MI (NPI 1043381353).
Provider details
- NPI number
- 1043381353
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- PZ056351 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
307 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 275 | $126 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 32 | $58 |
Typical Medicare-allowed amounts for these services range $58–$126 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 921 | 268 |
| Methotrexate Sodiumbrand: Methotrexate | 771 | 205 |
| Hydroxychloroquine Sulfate | 703 | 195 |
| Tramadol Hcl | 148 | 25 |
| Meloxicam | 140 | 41 |
| Leflunomide | 133 | 37 |
| Sulfasalazine | 113 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$404 across 23 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-10
- Last updated
- 2025-04-25
- Certified
- 2025-04-25
Frequently asked questions
- What is Peter Zadvinskis's NPI number?
- Peter Zadvinskis's National Provider Identifier (NPI) is 1043381353, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Zadvinskis's specialty?
- Peter Zadvinskis is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Zadvinskis located?
- Peter Zadvinskis's practice location on file with NPPES is 3271 Clear Vista Ct Ne, Grand Rapids, MI 49525-9477.
- What is Peter Zadvinskis's phone number?
- The practice phone number listed in the NPPES registry for Peter Zadvinskis is (616) 267-7293.
- Is Peter Zadvinskis's NPI active?
- Yes — Peter Zadvinskis's NPI (1043381353) is active in the NPPES registry as of the last update on 2025-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.