Hilary Williamson
Physician Assistant · Dayton, OH
Hilary Williamson is a physician assistant with a practice address in Dayton, Ohio, and NPI 1174061667, issued on Feb 6, 2017. Check the license (Ohio 50.004989RX, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Hilary Williamson
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 50.004989RX OH
PA13231 TX
Self-reported in NPPES; status is on the state search - Practice location
- 30 E Apple St Ste 1480, Dayton, OH 45409
- Phone
- (937) 208-3220
- Enumerated
- Feb 6, 2017
- Record last updated
- Sep 5, 2024
- Fax
- (937) 208-3633
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 5,325 in Ohio → Look up another NPI →
Also registered at 30 E Apple St Ste 1480
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Hilary Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 50.004989RXCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average physician assistant in 2024
65 Medicare Part D claims for 15 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Metoprolol Tartrate16 claims
- Amlodipine Besylate11 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: $472.29
36 payments; by number, the most common kind was food and beverage; the largest payer was Atricure, 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.
Hilary Williamson among 5,325 physician assistant records in Ohio
Hilary Williamson is one of 5,325 physician assistant records with a practice address in Ohio. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 41% of them.
- NPI issued2017 · 41% of these records are older, 53% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2024 · 37% 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 Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
250 physician assistant records list a practice address in Dayton
They are 250 of the 12,431 NPPES records with a practice address in Dayton, and 5,325 physician assistant records in Ohio.
All 5,325 in Ohio → Every provider in Dayton → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Pramila Bharwani, PA-CDayton, OH 454091841295086
- Edward Chance, P.A.Dayton, OH 454091710071840
- Lisa Grow, PACDayton, OH 454091134217011
- Sean Haig, PADayton, OH 454091881760270
- Kelli Huesman, PADayton, OH 454091700817483
- Angela Kemp, PADayton, OH 454091366779266
- Gregory Kooyman, P.A.Dayton, OH 454091346334406
- Katherine Mattingly, PA-CDayton, OH 454091699774174
Common questions
What is Hilary Williamson's NPI number?
Hilary Williamson's National Provider Identifier (NPI) is 1174061667, issued on Feb 6, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Hilary Williamson located?
The NPPES record lists a practice address at 30 E Apple St Ste 1480, Dayton, OH, 45409. Phone: (937) 208-3220. Providers update this record themselves, so call before visiting.
How can I verify Hilary Williamson's license?
NPPES lists Ohio license number 50.004989RX, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does Hilary Williamson prescribe under Medicare Part D?
In 2024, Hilary Williamson had 65 Medicare Part D claims for 15 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.