Margaret Mackenzie Shea, PA-C
Physician Assistant · Germantown, MD
Margaret Mackenzie Shea, PA-C is a physician assistant with a practice address in Germantown, Maryland, and NPI 1356839849, issued on Apr 30, 2018. Check the license (Maryland C06863, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Mackenzie Shea
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- C06863 MD
PA031663 DC
Self-reported in NPPES; status is on the state search - Practice location
- 20410 Observation Dr Ste 102, Germantown, MD 20876
- Phone
- (202) 835-2222
- Enumerated
- Apr 30, 2018
- Record last updated
- Dec 7, 2023
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,224 in Maryland → Look up another NPI →
Also registered at 20410 Observation Dr Ste 102
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bradley Gelfand, MDOrthopaedic Surgery of the Spine Physician1104386267
Verify Margaret Mackenzie Shea in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license C06863Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average physician assistant in 2024
28 Medicare Part D claims for 19 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 12 claims were for opioids.
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): 86.1 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).
Margaret Mackenzie Shea among 3,224 physician assistant records in Maryland
Margaret Mackenzie Shea, PA-C is one of 3,224 physician assistant records with a practice address in Maryland. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 57% of them.
- NPI issued2018 · 57% of these records are older, 38% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2023 · 46% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
41 physician assistant records list a practice address in Germantown
They are 41 of the 1,327 NPPES records with a practice address in Germantown, and 3,224 physician assistant records in Maryland.
All 3,224 in Maryland → Every provider in Germantown → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Bradley Bailey, PA-CGermantown, MD 208761164996245
- Michael Burns, PHYSICIAN ASSISTANTGermantown, MD 208761780278374
- Padma Gainedi, PAGermantown, MD 208761407043748
- Thomas Hettich, PA-CGermantown, MD 208761992765747
- Joseph McKelvey, PA-CGermantown, MD 208761962872333
- Samaaneh MoezziGermantown, MD 208761093328387
- Nancy Nguyen, PHYSICIAN ASSISTANTGermantown, MD 208761922776558
- Jasmine RussellGermantown, MD 208761841829116
Common questions
What is Margaret Mackenzie Shea, PA-C's NPI number?
Margaret Mackenzie Shea, PA-C's National Provider Identifier (NPI) is 1356839849, issued on Apr 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Mackenzie Shea, PA-C located?
The NPPES record lists a practice address at 20410 Observation Dr Ste 102, Germantown, MD, 20876. Phone: (202) 835-2222. Providers update this record themselves, so call before visiting.
How can I verify Margaret Mackenzie Shea, PA-C's license?
NPPES lists Maryland license number C06863, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Mackenzie Shea, PA-C prescribe under Medicare Part D?
In 2024, Margaret Mackenzie Shea, PA-C had 28 Medicare Part D claims for 19 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Margaret Mackenzie Shea, PA-C's MIPS final score?
The 2023 MIPS final score is 86.1 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.