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
- Entity
- Type 1 · individual
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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- Kimberly Larson, ARNPFamily Medicine Physician1689680183
- 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, mostly 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.
3 hospital and facility affiliations
- Iowa Orthopaedic Center PCDes Moines, IA
- Mercyone UrgentcareMason City, IA
- North Iowa Mercy ClinicsMason City, IA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
34 physician assistant records list a Mason City practice address
They are 34 of the 866 NPPES records with a Mason City practice address, and 1,525 physician assistant records in Iowa.
All 34 in Mason City → All 1,525 in Iowa → Every provider in Mason City →
Other physician assistant records in Iowa
- Fady AbawiDavenport, IA1861379224
- Steven AbdoCoralville, IA1780375576
- Leah Abebe, PACouncil Bluffs, IA1053941591
- Timothy Ackarman, PAForest City, IA1447368170
- Parker Acree, PA-CIowa City, IA1760251540
- Grace Adam, PA-CIowa City, IA1962150227
- Grace Adsem, PA-CAnkeny, IA1487456653
- Alexis Ahlberg, PA-CCedar Rapids, IA1396330288
- Madisen Ahlstrom, PA-CDavenport, IA1255021770
- Karen Ajram, PAIowa City, IA1598754442
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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.