Ruth L. Williams, PA-C
Physician Assistant · Saint Louis, MO
Ruth L. Williams, PA-C is a physician assistant with a practice address in Saint Louis, Missouri, and NPI 1952745903, issued on Apr 22, 2013. Check the license (Missouri 2022013795, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ruth L. Williams
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 2022013795 MO
085004642 IL
1774 NE
Self-reported in NPPES; status is on the state search - Practice location
- 625 S New Ballas RD, Saint Louis, MO 63141
- Phone
- (314) 251-0175
- Enumerated
- Apr 22, 2013
- Record last updated
- Mar 22, 2024
- Medicare enrollment
- Enrolled (PECOS I20230718003346); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 1,790 in Missouri → Look up another NPI →
Also registered at 625 S New Ballas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ruth L. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2022013795Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average physician assistant in 2024
102 Medicare Part D claims for 67 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Mercy Hospitals East CommunitiesSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ruth L. Williams among 1,790 physician assistant records in Missouri
Ruth L. Williams, PA-C is one of 1,790 physician assistant records with a practice address in Missouri. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 30% of them.
- NPI issued2013 · 30% of these records are older, 67% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2012 · median 2019 among the 1,250 with a school on file
- Record last updated2024 · 32% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
498 physician assistant records list a practice address in Saint Louis
They are 498 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,790 physician assistant records in Missouri.
All 1,790 in Missouri → Every provider in Saint Louis → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Christopher Berner, P.A.-CSaint Louis, MO 631411376674176
- Lindsey Blaha, PA-CSaint Louis, MO 631411609802123
- Heather Brinkman, PHY ASSIST CERTSaint Louis, MO 631411992718522
- Michelle BuschSaint Louis, MO 631411760585087
- Kara Cardinal, PASaint Louis, MO 631411619065331
- Amie Chang, P.A.Creve Coeur, MO 631411366557209
- Kara Harres, PASaint Louis, MO 631411306920277
- Shirley Haynes, PA-CSaint Louis, MO 631411225003551
Common questions
What is Ruth L. Williams, PA-C's NPI number?
Ruth L. Williams, PA-C's National Provider Identifier (NPI) is 1952745903, issued on Apr 22, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Ruth L. Williams, PA-C located?
The NPPES record lists a practice address at 625 S New Ballas RD, Saint Louis, MO, 63141. Phone: (314) 251-0175. Providers update this record themselves, so call before visiting.
How can I verify Ruth L. Williams, PA-C's license?
NPPES lists Missouri license number 2022013795, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Ruth L. Williams, PA-C prescribe under Medicare Part D?
In 2024, Ruth L. Williams, PA-C had 102 Medicare Part D claims for 67 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.