Rachel Margaret Breen
Physician Assistant · Boston, MA
Rachel Margaret Breen is a physician assistant with a practice address in Boston, Massachusetts, and NPI 1881332039, issued on May 26, 2022. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rachel Margaret Breen
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 800 Washington St, Boston, MA 02111
- Phone
- (617) 636-5566
- Enumerated
- May 26, 2022
- Record last updated
- Aug 24, 2022
- Medicare enrollment
- Enrolled (PECOS I20231108001140); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 800 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aya Abdelnaser, MDStudent in an Organized Health Care Education/Training Program1770425373
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- Ahmad AboalfarajSurgery Physician1538517651
- Tala Abu Samaan, MDStudent in an Organized Health Care Education/Training Program1376386250
Verify Rachel Margaret Breen 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
92% fewer Medicare Part D claims than the average physician assistant in 2024
63 Medicare Part D claims for 26 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
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.
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).
Rachel Margaret Breen among 4,713 physician assistant records in Massachusetts
Rachel Margaret Breen 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 2022, is newer than 68% of them.
- NPI issued2022 · 68% of these records are older, 25% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2022 · median 2019 among the 3,217 with a school on file
- Record last updated2022 · 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).
1,660 physician assistant records list a practice address in Boston
They are 1,660 of the 41,865 NPPES records with a practice address in Boston, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Boston → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Gerardina Bueti, PA-CBoston, MA 021111164778023
- Leasha Burow, PA-CBoston, MA 021111912087222
- Patricia Clifford, PABoston, MA 021111124155122
- Ann Dempsey, P.A.Boston, MA 021111245317684
- Alison Kaprove, PABoston, MA 021111053497396
- Mihaela Mabius, PABoston, MA 021111326358151
- Sara McReynolds, PABoston, MA 021111982901823
- Ketna Patel, PABoston, MA 021111437384757
Common questions
What is Rachel Margaret Breen's NPI number?
Rachel Margaret Breen's National Provider Identifier (NPI) is 1881332039, issued on May 26, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Rachel Margaret Breen located?
The NPPES record lists a practice address at 800 Washington St, Boston, MA, 02111. Phone: (617) 636-5566. Providers update this record themselves, so call before visiting.
How can I verify Rachel Margaret Breen's license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Rachel Margaret Breen prescribe under Medicare Part D?
In 2024, Rachel Margaret Breen had 63 Medicare Part D claims for 26 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
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.