Natalie Louise McWilliams, PA-C
Medical Physician Assistant · Mars, PA
Natalie Louise McWilliams, PA-C is a medical physician assistant with a practice address in Mars, Pennsylvania, and NPI 1437751393, issued on Nov 14, 2020. Check the license (Pennsylvania MA061915, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Natalie Louise McWilliams
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- MA061915 PA
Self-reported in NPPES; status is on the state search - Practice location
- 123 Grand Ave, Mars, PA 16046
- Phone
- (724) 625-3171
- Enumerated
- Nov 14, 2020
- Record last updated
- Jun 11, 2026
- Medicare enrollment
- Enrolled (PECOS I20201211001795); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,897 in Pennsylvania → Look up another NPI →
Also registered at 123 Grand Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abigail Sprigler, PA-CPhysician Assistant1659004695
Verify Natalie Louise McWilliams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license MA061915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average medical physician assistant in 2024
796 Medicare Part D claims for 216 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 62 claims were for opioids.
Most prescribed
- Prednisone180 claims
- Methotrexate105 claims
- Hydroxychloroquine Sulfate62 claims
- Meloxicam47 claims
- Methylprednisolone44 claims
- Tramadol Hcl41 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): 77.5 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).
Bills Medicare through one group practice
- University OF Pittsburgh PhysiciansPittsburgh, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Natalie Louise McWilliams among 3,897 medical physician assistant records in Pennsylvania
Natalie Louise McWilliams, PA-C 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 2020, is newer than 76% of them.
- NPI issued2020 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2015 among the 2,467 with a school on file
- Record last updated2026 · 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).
3 medical physician assistant records list a practice address in Mars
They are 3 of the 164 NPPES records with a practice address in Mars, and 3,897 medical physician assistant records in Pennsylvania.
All 3,897 in Pennsylvania → Every provider in Mars → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Halee Onder, PA-CMars, PA 160461508851312
- Teresa West, PA-CSeven Fields, PA 160461821299652
- Megan White, PA-CMars, PA 160461285806463
- Erica Cress, PA-CHarrisville, PA 160381205262250
- Leslie Archer, PA-CValencia, PA 160591033194436
- Rebecca Shuster, PA-CZelienople, PA 160631528435906
- Jennifer Arnold, PA-CCranberry Township, PA 160661518007764
- Lisa Bartlett, PA-CCranberry Township, PA 160661255778585
Common questions
What is Natalie Louise McWilliams, PA-C's NPI number?
Natalie Louise McWilliams, PA-C's National Provider Identifier (NPI) is 1437751393, issued on Nov 14, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Natalie Louise McWilliams, PA-C located?
The NPPES record lists a practice address at 123 Grand Ave, Mars, PA, 16046. Phone: (724) 625-3171. Providers update this record themselves, so call before visiting.
How can I verify Natalie Louise McWilliams, PA-C's license?
NPPES lists Pennsylvania license number MA061915, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Natalie Louise McWilliams, PA-C prescribe under Medicare Part D?
In 2024, Natalie Louise McWilliams, PA-C had 796 Medicare Part D claims for 216 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Natalie Louise McWilliams, PA-C's MIPS final score?
The 2023 MIPS final score is 77.5 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.