Erin Aileen McNamara, PA
Physician Assistant · Chelmsford, MA
Erin Aileen McNamara, PA is a physician assistant with a practice address in Chelmsford, Massachusetts, and NPI 1215504790, issued on Jun 4, 2021. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Erin Aileen McNamara
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 25 Arbutus Ave, Chelmsford, MA 01824
- Phone
- (978) 846-3055
- Enumerated
- Jun 4, 2021
- Record last updated
- Jun 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210927002264); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Verify Erin Aileen McNamara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts 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
88% fewer Medicare Part D claims than the average physician assistant in 2024
99 Medicare Part D claims for 39 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 16 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): 86.3 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
- Dana-Farber Cancer Institute, Inc.Boston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin Aileen McNamara among 4,713 physician assistant records in Massachusetts
Erin Aileen McNamara, PA is one of 4,713 physician assistant records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 63% of them.
- NPI issued2021 · 63% of these records are older, 32% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2021 · median 2019 among the 3,217 with a school on file
- Record last updated2021 · 38% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 physician assistant records list a practice address in Chelmsford
They are 11 of the 937 NPPES records with a practice address in Chelmsford, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Chelmsford → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Sonia Almeida, PAChelmsford, MA 018241063560357
- Kittiya Arisarachai, PA-CChelmsford, MA 018241467013672
- Cheryl Brackbill, PA-CChelmsford, MA 018241073713087
- Christine Hulbert, PA-CChelmsford, MA 018241407921778
- Stephanie Lewis, PAChelmsford, MA 018241821018516
- Catherine Napoli, PA-CChelmsford, MA 018241467130104
- Kira OzerChelmsford, MA 018241861365975
- Anne Riemer, PA-CChelmsford, MA 018241447447990
Common questions
What is Erin Aileen McNamara, PA's NPI number?
Erin Aileen McNamara, PA's National Provider Identifier (NPI) is 1215504790, issued on Jun 4, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Erin Aileen McNamara, PA located?
The NPPES record lists a practice address at 25 Arbutus Ave, Chelmsford, MA, 01824. Phone: (978) 846-3055. Providers update this record themselves, so call before visiting.
How can I verify Erin Aileen McNamara, PA's license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Erin Aileen McNamara, PA prescribe under Medicare Part D?
In 2024, Erin Aileen McNamara, PA had 99 Medicare Part D claims for 39 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Erin Aileen McNamara, PA's MIPS final score?
The 2023 MIPS final score is 86.3 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.