Daniel Patrick O'Brien, PA-C
Emergency Medicine Physician · Southborough, MA
Daniel Patrick O'Brien, PA-C is an emergency medicine physician with a practice address in Southborough, Massachusetts, and NPI 1689284366, issued on Aug 6, 2020. Check the license (Massachusetts PA8087, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Daniel Patrick O'Brien
- Credential
- PA-C
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- PA8087 MA
Self-reported in NPPES; status is on the state search - Practice location
- 9 Watkins LN, Southborough, MA 01772
- Phone
- (508) 612-1567
- Enumerated
- Aug 6, 2020
- Record last updated
- Aug 28, 2025
- Medicare enrollment
- Enrolled (PECOS I20210907000736); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Verify Daniel Patrick O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license PA8087Check 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 emergency medicine physician in 2024
122 Medicare Part D claims for 99 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cefpodoxime Proxetil19 claims
- Doxycycline Monohydrate14 claims
- Prednisone14 claims
- Ondansetron Hcl13 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: $46.90
1 payment: food and beverage; the largest payer was Dentsply IH AB. 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 2 group practices
- Milford Regional Physician Group, Inc.Hopkinton, MA
- Umass Memorial Medical Group IncFranklin, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Patrick O'Brien among 1,829 emergency medicine physician records in Massachusetts
Daniel Patrick O'Brien, PA-C 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 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 8% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · 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).
Emergency Medicine Physician providers in Massachusetts
There are 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Southborough → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Charles Fatseas, M.D.Sherborn, MA 017701407874944
- Kevin Greene, MDNatick, MA 017601114389111
- Gerald Hopkins, M.D.Natick, MA 017601710200936
- Stephen Kruskall, M.DNatick, MA 017601861578403
- Mary Burke, M.D.Milford, MA 017571972661668
- Audrey Butler, MDMilford, MA 017571740984533
- Vivek Chander, M.D.Milford, MA 017571770641524
- Alexandria Gregory, MDMilford, MA 017571548720881
Common questions
What is Daniel Patrick O'Brien, PA-C's NPI number?
Daniel Patrick O'Brien, PA-C's National Provider Identifier (NPI) is 1689284366, issued on Aug 6, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Patrick O'Brien, PA-C located?
The NPPES record lists a practice address at 9 Watkins LN, Southborough, MA, 01772. Phone: (508) 612-1567. Providers update this record themselves, so call before visiting.
How can I verify Daniel Patrick O'Brien, PA-C's license?
NPPES lists Massachusetts license number PA8087, 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 Daniel Patrick O'Brien, PA-C prescribe under Medicare Part D?
In 2024, Daniel Patrick O'Brien, PA-C had 122 Medicare Part D claims for 99 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Daniel Patrick O'Brien, PA-C'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.