Mary Joan O'Neill, M.D.
Emergency Medicine Physician · Milford, MA
Mary Joan O'Neill, M.D. is an emergency medicine physician with a practice address in Milford, Massachusetts, and NPI 1861431959, issued on Jun 5, 2006. Check the license (Massachusetts 152946, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mary Joan O'Neill
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 152946 MA
Self-reported in NPPES; status is on the state search - Practice location
- 14 Prospect St, Milford, MA 01757
- Phone
- (508) 422-2810
- Enumerated
- Jun 5, 2006
- Record last updated
- Sep 8, 2025
- Fax
- (508) 634-3276
- Medicaid ID
- 3172155 MA
- Medicare enrollment
- Enrolled (PECOS I20080325000201); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1994
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 14 Prospect St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Joan O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 152946Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average emergency medicine physician in 2024
73 Medicare Part D claims for 59 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Cefpodoxime Proxetil13 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): 100 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: $20.01
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 12,335 providers of this specialty with any payment received $953.79 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
- Orion Emergency Services, Inc.Milford, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Joan O'Neill among 1,829 emergency medicine physician records in Massachusetts
Mary Joan O'Neill, M.D. is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1994 · median 2011 among the 1,200 with a school on file
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 emergency medicine physician records list a practice address in Milford
They are 19 of the 3,459 NPPES records with a practice address in Milford, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Milford → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mary Burke, M.D.Milford, MA 017571972661668
- Vivek Chander, M.D.Milford, MA 017571770641524
- Joseph Currier, M.D.Milford, MA 017571255499026
- Karen Ann Defazio, M.D.Milford, MA 017571982641676
- Jon Hojnoski, M.D.Milford, MA 017571154311827
- Jeffrey Hopkins, M.D.Milford, MA 017571346308012
- Joshua Jarbeau, M.D.Milford, MA 017571184782021
- Julian Kadish, M.D.Milford, MA 017571295899946
Common questions
What is Mary Joan O'Neill, M.D.'s NPI number?
Mary Joan O'Neill, M.D.'s National Provider Identifier (NPI) is 1861431959, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Joan O'Neill, M.D. located?
The NPPES record lists a practice address at 14 Prospect St, Milford, MA, 01757. Phone: (508) 422-2810. Providers update this record themselves, so call before visiting.
How can I verify Mary Joan O'Neill, M.D.'s license?
NPPES lists Massachusetts license number 152946, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Joan O'Neill, M.D. prescribe under Medicare Part D?
In 2024, Mary Joan O'Neill, M.D. had 73 Medicare Part D claims for 59 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Mary Joan O'Neill, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 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.