Erin E. Williams, PA
Medical Physician Assistant · Saint Marys, PA
Erin E. Williams, PA is a medical physician assistant with a practice address in Saint Marys, Pennsylvania, and NPI 1366822546, issued on Jun 3, 2015. Check the license with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Erin E. Williams
- Credential
- PA
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- Practice location
- 761 Johnsonburg RD, Saint Marys, PA 15857
- Phone
- (814) 788-8777
- Enumerated
- Jun 3, 2015
- Record last updated
- Oct 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150729007130); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,897 in Pennsylvania → Look up another NPI →
Also registered at 761 Johnsonburg RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- David Johe, MDOrthopaedic Surgery Physician1609889583
- Melanie Johnson, PA-CMedical Physician Assistant1831590363
- Steven Koch, MDObstetrics & Gynecology Physician1861401424
- Marsha LehmanFamily Nurse Practitioner1083497424
Verify Erin E. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania 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
3.1 times the Medicare Part D claims of the average medical physician assistant in 2024
3,536 Medicare Part D claims for 227 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 71 claims were for opioids.
Most prescribed
- Atorvastatin Calcium263 claims
- Lisinopril189 claims
- Metformin Hcl151 claims
- Levothyroxine Sodium139 claims
- Rosuvastatin Calcium137 claims
- Losartan Potassium95 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 96.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $266.15
15 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 16,165 providers of this specialty with any payment received $1,055.00 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 2 group practices
- Dubois Regional Medical CenterDu Bois, PA
- Elk Regional Health CenterJohnsonburg, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin E. Williams among 3,897 medical physician assistant records in Pennsylvania
Erin E. Williams, PA is one of 3,897 medical physician assistant records with a practice address in Pennsylvania. 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 2015, is newer than 54% of them.
- NPI issued2015 · 54% of these records are older, 41% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2015 among the 2,467 with a school on file
- Record last updated2020 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 medical physician assistant records list a practice address in Saint Marys
They are 8 of the 182 NPPES records with a practice address in Saint Marys, and 3,897 medical physician assistant records in Pennsylvania.
All 3,897 in Pennsylvania → Every provider in Saint Marys → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Anne Breindel, PA-CSaint Marys, PA 158571407858277
- Paul Clemens, PA-CSaint Marys, PA 158571518077999
- Kelly HaumesserSaint Marys, PA 158571326753336
- Michaela HerzingSaint Marys, PA 158571124976691
- Alexandra Housler, PA-CSaint Marys, PA 158571841740073
- Melanie Johnson, PA-CSaint Marys, PA 158571831590363
- Tammy Weis, PA-CSaint Marys, PA 158571437425261
- Jacki Depanfilis, PA-CRidgway, PA 158531245583665
Common questions
What is Erin E. Williams, PA's NPI number?
Erin E. Williams, PA's National Provider Identifier (NPI) is 1366822546, issued on Jun 3, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Erin E. Williams, PA located?
The NPPES record lists a practice address at 761 Johnsonburg RD, Saint Marys, PA, 15857. Phone: (814) 788-8777. Providers update this record themselves, so call before visiting.
How can I verify Erin E. Williams, PA's license?
Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Erin E. Williams, PA prescribe under Medicare Part D?
In 2024, Erin E. Williams, PA had 3,536 Medicare Part D claims for 227 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Erin E. Williams, PA's MIPS final score?
The 2023 MIPS final score is 96.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.