Daniel O'Leary
Physician Assistant · Leominster, MA
Daniel O'Leary is a physician assistant with a practice address in Leominster, Massachusetts, and NPI 1255778551, issued on May 28, 2013. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Daniel O'Leary
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 100 Hospital RD Ste 3C, Leominster, MA 01453
- Phone
- (978) 534-6333
- Enumerated
- May 28, 2013
- Record last updated
- Sep 7, 2022
- Medicaid ID
- 110125432A MA
- Medicare enrollment
- Enrolled (PECOS I20150422000310); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 100 Hospital RD Ste 3C
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Brill, DOOrthopaedic Surgery Physician1609202555
- Hayden Rockson, M.D.Orthopaedic Surgery Physician1750776977
Verify Daniel O'Leary 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
46% fewer Medicare Part D claims than the average physician assistant in 2024
448 Medicare Part D claims for 248 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 203 claims were for opioids.
Most prescribed
- Oxycodone Hcl181 claims
- Ibuprofen115 claims
- Diclofenac Sodium Er47 claims
- Diclofenac Sodium18 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.
Industry payments in 2024: $72.69
3 payments; by number, the most common kind was food and beverage; the largest payer was DePuy Synthes Sales Inc. 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.
Bills Medicare through one group practice
- Longview Orthopaedic Center, LLCLeominster, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel O'Leary among 4,713 physician assistant records in Massachusetts
Daniel O'Leary 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 2013, is newer than 28% of them.
- NPI issued2013 · 28% of these records are older, 70% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2012 · 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).
24 physician assistant records list a practice address in Leominster
They are 24 of the 1,151 NPPES records with a practice address in Leominster, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Leominster → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kalyn Barger, PA-CLeominster, MA 014531528339934
- Xiaoming Bi, PA-CLeominster, MA 014531205139037
- Alison Bird, P.A.Leominster, MA 014531184636987
- Abigail Engel, P.A.Leominster, MA 014531336481191
- Vicente Esparza, PALeominster, MA 014531366403511
- Rebecca Johnston, NPLeominster, MA 014531558475426
- Charles Loucraft, PALeominster, MA 014531699865899
- Karen Lybolt, P.A.Leominster, MA 014531811969280
Common questions
What is Daniel O'Leary's NPI number?
Daniel O'Leary's National Provider Identifier (NPI) is 1255778551, issued on May 28, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Daniel O'Leary located?
The NPPES record lists a practice address at 100 Hospital RD Ste 3C, Leominster, MA, 01453. Phone: (978) 534-6333. Providers update this record themselves, so call before visiting.
How can I verify Daniel O'Leary's license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Daniel O'Leary prescribe under Medicare Part D?
In 2024, Daniel O'Leary had 448 Medicare Part D claims for 248 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.