Mary Vanderwerp, PA
NPI 1023416351 · Physician Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Vanderwerp, PA is a Physician Assistant provider in Grand Rapids, MI (NPI 1023416351).
Provider details
- NPI number
- 1023416351
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 5601007241 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 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
67 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 20 | $102 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 17 | $98 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 16 | $142 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 14 | $68 |
Typical Medicare-allowed amounts for these services range $68–$142 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 87 | 32 |
| Atorvastatin Calcium | 79 | 27 |
| Ticagrelorbrand: Brilinta | 65 | 21 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 49 | 18 |
| Nitroglycerin | 48 | 44 |
| Amlodipine Besylate | 41 | — |
| Carvedilol | 32 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$93 across 3 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
- 2014-12-19
- Last updated
- 2021-02-17
- Certified
- 2021-02-17
Frequently asked questions
- What is Mary Vanderwerp's NPI number?
- Mary Vanderwerp's National Provider Identifier (NPI) is 1023416351, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Vanderwerp's specialty?
- Mary Vanderwerp is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Vanderwerp located?
- Mary Vanderwerp's practice location on file with NPPES is 100 Michigan St Ne, Grand Rapids, MI 49503-2560.
- What is Mary Vanderwerp's phone number?
- The practice phone number listed in the NPPES registry for Mary Vanderwerp is (616) 391-3431.
- Does Mary Vanderwerp accept Medicare?
- Mary Vanderwerp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Vanderwerp's NPI active?
- Yes — Mary Vanderwerp's NPI (1023416351) is active in the NPPES registry as of the last update on 2021-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.