Alyson Larsen, PA-C
Physician Assistant · Boston, MA
Alyson Larsen, PA-C is a physician assistant with a practice address in Boston, Massachusetts, and NPI 1417516162, issued on Jun 6, 2019. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Alyson Larsen
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 800 Washington St, Boston, MA 02111
- Phone
- (617) 636-5000
- Enumerated
- Jun 6, 2019
- Record last updated
- Jan 5, 2023
- Medicare enrollment
- Enrolled (PECOS I20190819002397); 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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- Ahmad AboalfarajSurgery Physician1538517651
- Tala Abu Samaan, MDStudent in an Organized Health Care Education/Training Program1376386250
Verify Alyson Larsen 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
79% more Medicare Part D claims than the average physician assistant in 2024
1,482 Medicare Part D claims for 155 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Amlodipine Besylate104 claims
- Losartan Potassium75 claims
- Lisinopril67 claims
- Atorvastatin Calcium66 claims
- Allopurinol61 claims
- Farxiga56 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.
Bills Medicare through one group practice
- Pratt Medical Group IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alyson Larsen among 4,713 physician assistant records in Massachusetts
Alyson Larsen, PA-C 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 2019, is newer than 50% of them.
- NPI issued2019 · 50% of these records are older, 44% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2019 · median 2019 among the 3,217 with a school on file
- Record last updated2023 · 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 Alyson Larsen, PA-C's NPI number?
Alyson Larsen, PA-C's National Provider Identifier (NPI) is 1417516162, issued on Jun 6, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Alyson Larsen, PA-C located?
The NPPES record lists a practice address at 800 Washington St, Boston, MA, 02111. Phone: (617) 636-5000. Providers update this record themselves, so call before visiting.
How can I verify Alyson Larsen, PA-C's license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Alyson Larsen, PA-C prescribe under Medicare Part D?
In 2024, Alyson Larsen, PA-C had 1,482 Medicare Part D claims for 155 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.