Holly Vanderwerff
Physician Assistant · Troy, MI
Holly Vanderwerff is a physician assistant with a practice address in Troy, Michigan, and NPI 1194195966, issued on Oct 5, 2015. Check the license (Michigan 5601007515, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Holly Vanderwerff
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 5601007515 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4600 Investment Dr, Troy, MI 48098
- Phone
- (248) 267-5000
- Enumerated
- Oct 5, 2015
- Record last updated
- Oct 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (248) 267-5001
- Medicare enrollment
- Enrolled (PECOS I20151030000977); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 6,989 in Michigan → Look up another NPI →
Also registered at 4600 Investment Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Holly Vanderwerff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 5601007515Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% more Medicare Part D claims than the average physician assistant in 2024
1,259 Medicare Part D claims for 590 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Clobetasol Propionate143 claims
- Triamcinolone Acetonide110 claims
- Ammonium Lactate106 claims
- Fluticasone Propionate99 claims
- Mupirocin90 claims
- Fluorouracil84 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,872.40
72 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Affiliated Troy Dermatologists, PLLCTroy, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Holly Vanderwerff among 6,989 physician assistant records in Michigan
Holly Vanderwerff is one of 6,989 physician assistant records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 45% of them.
- NPI issued2015 · 45% of these records are older, 52% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2015 · median 2017 among the 4,739 with a school on file
- Record last updated2015 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
237 physician assistant records list a practice address in Troy
They are 237 of the 3,809 NPPES records with a practice address in Troy, and 6,989 physician assistant records in Michigan.
All 6,989 in Michigan → Every provider in Troy → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kristy Armstrong, PATroy, MI 480981245601665
- Patrick Coulter, P.A.Troy, MI 480981710967179
- Magdalena DillonTroy, MI 480981225353287
- Slobodan Djordjevic, PA-CTroy, MI 480981790768802
- Jill Ellis, P.A.Troy, MI 480981720052483
- Diana Flaharty, PA-CTroy, MI 480981295244283
- Doru Lica, PATroy, MI 480981407037716
- Sarah Markiewicz, PATroy, MI 480981831436393
Common questions
What is Holly Vanderwerff's NPI number?
Holly Vanderwerff's National Provider Identifier (NPI) is 1194195966, issued on Oct 5, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Holly Vanderwerff located?
The NPPES record lists a practice address at 4600 Investment Dr, Troy, MI, 48098. Phone: (248) 267-5000. Providers update this record themselves, so call before visiting.
How can I verify Holly Vanderwerff's license?
NPPES lists Michigan license number 5601007515, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Holly Vanderwerff prescribe under Medicare Part D?
In 2024, Holly Vanderwerff had 1,259 Medicare Part D claims for 590 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.