Daniel J. Ainsworth, MMSC., PA-C
Physician Assistant · Boston, MA
Daniel J. Ainsworth, MMSC., PA-C is a physician assistant with a practice address in Boston, Massachusetts, and NPI 1780906321, issued on Feb 24, 2010. Check the license (Massachusetts PA3943, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Daniel J. Ainsworth
- Credential
- MMSC., PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA3943 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Fruit St, Boston, MA 02114
- Phone
- (617) 726-2000
- Enumerated
- Feb 24, 2010
- Record last updated
- Feb 24, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210604001836); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 55 Fruit St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Megan Abbott, MDAnesthesiology Physician1730839333
- Moustafa AbdallaStudent in an Organized Health Care Education/Training Program1952046062
- Shadi Abdar Esfahani, MD, MPHDiagnostic Radiology Physician1497137590
Verify Daniel J. Ainsworth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA3943Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average physician assistant in 2024
231 Medicare Part D claims for 181 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone41 claims
- Azithromycin18 claims
- Cephalexin18 claims
- Doxycycline Hyclate18 claims
- Cyclobenzaprine Hcl17 claims
- Amoxicillin12 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): 65.4 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).
Industry payments in 2024: $97.38
2 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Saratoga HospitalSaratoga Springs, NY · Acute Care Hospitals3 of 5 stars
- Healthcare Partners OF Saratoga LtdMalta, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Daniel J. Ainsworth among 4,713 physician assistant records in Massachusetts
Daniel J. Ainsworth, MMSC., 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 2010, is newer than 22% of them.
- NPI issued2010 · 22% of these records are older, 76% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2009 · median 2019 among the 3,217 with a school on file
- Record last updated2010 · 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
- Andrea Barrett, PABoston, MA 021141619933090
- Lisa Beyer, PABoston, MA 021141598834202
- Jerene Bitondo, PABoston, MA 021141396810230
- Ryanne Coulson, PABoston, MA 021141639249865
- Christine Donaghey, PABoston, MA 021141821163866
- Amy Jones, PACBoston, MA 021141982640298
- Donald Lazure, PABoston, MA 021141659450021
- Diane Levis, PABoston, MA 021141093880023
Common questions
What is Daniel J. Ainsworth, MMSC., PA-C's NPI number?
Daniel J. Ainsworth, MMSC., PA-C's National Provider Identifier (NPI) is 1780906321, issued on Feb 24, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Daniel J. Ainsworth, MMSC., PA-C located?
The NPPES record lists a practice address at 55 Fruit St, Boston, MA, 02114. Phone: (617) 726-2000. Providers update this record themselves, so call before visiting.
How can I verify Daniel J. Ainsworth, MMSC., PA-C's license?
NPPES lists Massachusetts license number PA3943, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Daniel J. Ainsworth, MMSC., PA-C prescribe under Medicare Part D?
In 2024, Daniel J. Ainsworth, MMSC., PA-C had 231 Medicare Part D claims for 181 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Daniel J. Ainsworth, MMSC., PA-C's MIPS final score?
The 2023 MIPS final score is 65.4 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.