Margaret Hennessey, PA
Medical Physician Assistant · Saint Louis, MO
Margaret Hennessey, PA is a medical physician assistant with a practice address in Saint Louis, Missouri, and NPI 1982116414, issued on Oct 24, 2017. Check the license with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Hennessey
- Credential
- PA
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- Practice location
- 3635 Vista Ave, Saint Louis, MO 63110
- Phone
- (314) 577-8000
- Enumerated
- Oct 24, 2017
- Record last updated
- Oct 24, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180208002786); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 317 in Missouri → Look up another NPI →
Also registered at 3635 Vista Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Hennessey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri 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
96% fewer Medicare Part D claims than the average medical physician assistant in 2024
41 Medicare Part D claims for 23 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
Most prescribed
- Meloxicam17 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): 81.6 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).
Bills Medicare through one group practice
- Ssm Health Care GroupSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Hennessey among 317 medical physician assistant records in Missouri
Margaret Hennessey, PA is one of 317 medical physician assistant records with a practice address in Missouri. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 58% of them.
- NPI issued2017 · 58% of these records are older, 38% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2017 · median 2016 among the 201 with a school on file
- Record last updated2017 · 43% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in Missouri
There are 317 medical physician assistant records in Missouri.
All 317 in Missouri → Every provider in Saint Louis → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Yaa Asare, PASaint Louis, MO 631101477988624
- Stefanie Brier, PASaint Louis, MO 631101417230426
- Karry Brim, PASaint Louis, MO 631101831498997
- Kacie Brooks, PASaint Louis, MO 631101316305741
- Elizabeth Darcangelis, PA CSt Louis, MO 631101093770141
- Catherine Gould, PASaint Louis, MO 631101295262582
- Courtney Hosto, PASaint Louis, MO 631101790914877
- Ryan Lueking, PASaint Louis, MO 631101518352772
Common questions
What is Margaret Hennessey, PA's NPI number?
Margaret Hennessey, PA's National Provider Identifier (NPI) is 1982116414, issued on Oct 24, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Hennessey, PA located?
The NPPES record lists a practice address at 3635 Vista Ave, Saint Louis, MO, 63110. Phone: (314) 577-8000. Providers update this record themselves, so call before visiting.
How can I verify Margaret Hennessey, PA's license?
Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Hennessey, PA prescribe under Medicare Part D?
In 2024, Margaret Hennessey, PA had 41 Medicare Part D claims for 23 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Margaret Hennessey, PA's MIPS final score?
The 2023 MIPS final score is 81.6 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.