Claire Williams, PA
Physician Assistant · Mason City, IA
Claire Williams, PA is a physician assistant with a practice address in Mason City, Iowa, and NPI 1629719737, issued on Apr 5, 2022. Check the license with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Claire Williams
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 1421 4TH St SW, Mason City, IA 50401
- Phone
- (641) 428-2080
- Enumerated
- Apr 5, 2022
- Record last updated
- Oct 18, 2024
- Medicare enrollment
- Enrolled (PECOS I20230830001969); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 1,525 in Iowa → Look up another NPI →
Also registered at 1421 4TH St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Yen Chen Liu, MDDermatology Physician1316269160
- Carrissa Riggs, PAPhysician Assistant1750913406
- Laura Thorson, PAPhysician Assistant1801459730
Verify Claire Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average physician assistant in 2024
517 Medicare Part D claims for 235 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Clobetasol Propionate63 claims
- Triamcinolone Acetonide63 claims
- Hydrocortisone59 claims
- Betamethasone Dipropionate33 claims
- Ketoconazole33 claims
- Metronidazole27 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: $336.60
6 payments; by number, the most common kind was food and beverage; the largest payer was Supernus Pharmaceuticals, 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 3 group practices
- Iowa Orthopaedic Center PCDes Moines, IA
- Mercyone UrgentcareMason City, IA
- North Iowa Mercy ClinicsMason City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Claire Williams among 1,525 physician assistant records in Iowa
Claire Williams, PA is one of 1,525 physician assistant records with a practice address in Iowa. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 76% of them.
- NPI issued2022 · 76% of these records are older, 17% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2023 · median 2017 among the 1,053 with a school on file
- Record last updated2024 · 41% 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 Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 physician assistant records list a practice address in Mason City
They are 34 of the 866 NPPES records with a practice address in Mason City, and 1,525 physician assistant records in Iowa.
All 1,525 in Iowa → Every provider in Mason City → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Luan Bargman, PAMason City, IA 504011073525010
- Donald Beitzel, P.A.Mason City, IA 504011518939982
- Gregory Blank, PAMason City, IA 504011831161736
- Chad Boyer, PA-CMason City, IA 504011265638829
- Steven Dunnick, PAMason City, IA 504011437143781
- Jean Eichmeier, PA-CMason City, IA 504011295746329
- Diane Frakes-Julius, PAMason City, IA 504011376641134
- Rachel Hupke, M.P.A.S. PA-CMason City, IA 504011992147391
Common questions
What is Claire Williams, PA's NPI number?
Claire Williams, PA's National Provider Identifier (NPI) is 1629719737, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Claire Williams, PA located?
The NPPES record lists a practice address at 1421 4TH St SW, Mason City, IA, 50401. Phone: (641) 428-2080. Providers update this record themselves, so call before visiting.
How can I verify Claire Williams, PA's license?
Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Claire Williams, PA prescribe under Medicare Part D?
In 2024, Claire Williams, PA had 517 Medicare Part D claims for 235 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.