Holly Vanderwerff
NPI 1194195966 · Physician Assistant · Troy, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Vanderwerff is a Physician Assistant provider in Troy, MI (NPI 1194195966).
Provider details
- NPI number
- 1194195966
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 5601007515 (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
10 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
90 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 33 | $78 |
| Destruction of Skin Growth, 1-14 Growths17110 | 21 | $89 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 20 | $48 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 16 | $110 |
Typical Medicare-allowed amounts for these services range $48–$110 (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 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 143 | 94 |
| Triamcinolone Acetonide | 110 | 86 |
| Ammonium Lactate | 106 | 76 |
| Fluticasone Propionate | 99 | 84 |
| Mupirocin | 90 | 78 |
| Fluorouracil | 84 | 78 |
| Ciclopirox | 60 | 37 |
| Hydrocortisone | 55 | 51 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,872 across 72 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
- 2015-10-05
- Last updated
- 2015-10-05
Frequently asked questions
- What is Holly Vanderwerff's NPI number?
- Holly Vanderwerff's National Provider Identifier (NPI) is 1194195966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Vanderwerff's specialty?
- Holly Vanderwerff is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Holly Vanderwerff located?
- Holly Vanderwerff's practice location on file with NPPES is 4600 Investment Dr, Troy, MI 48098-6365.
- What is Holly Vanderwerff's phone number?
- The practice phone number listed in the NPPES registry for Holly Vanderwerff is (248) 267-5000.
- Does Holly Vanderwerff accept Medicare?
- Holly Vanderwerff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Vanderwerff's NPI active?
- Yes — Holly Vanderwerff's NPI (1194195966) is active in the NPPES registry as of the last update on 2015-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.