Mary Jean O, MD
Emergency Medicine Physician · New Brunswick, NJ
Mary Jean O, MD is an emergency medicine physician with a practice address in New Brunswick, New Jersey, and NPI 1912133810, issued on Jun 5, 2009. Check the license (New Jersey 25MA09247300, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary Jean O
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 25MA09247300 NJ
51520 CT
267682 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1 Robert Wood Johnson PL, New Brunswick, NJ 08901
- Phone
- (732) 937-8700
- Enumerated
- Jun 5, 2009
- Record last updated
- Oct 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160708001829); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,754 in New Jersey → Look up another NPI →
Also registered at 1 Robert Wood Johnson PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ifeoluwa AdedejiAcute Care Nurse Practitioner1598315210
- Hiba Adina, PATIENT MONITOROther Technician1093337347
- Richard Agag, MDPlastic Surgery Physician1497937486
Verify Mary Jean O in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA09247300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average emergency medicine physician in 2024
255 Medicare Part D claims for 142 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 40 claims were for opioids.
Most prescribed
- Cefdinir26 claims
- Ondansetron Odt21 claims
- Oxycodone-Acetaminophen19 claims
- Methocarbamol18 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): 84.5 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).
Bills Medicare through one group practice
- Hartford Healthcare Medical Group Specialists PLLCBridgeport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Jean O among 1,754 emergency medicine physician records in New Jersey
Mary Jean O, MD is one of 1,754 emergency medicine physician records with a practice address in New Jersey. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 50% of them.
- NPI issued2009 · 50% of these records are older, 47% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2009 · median 2011 among the 1,167 with a school on file
- Record last updated2020 · 55% 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 New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
68 emergency medicine physician records list a practice address in New Brunswick
They are 68 of the 2,740 NPPES records with a practice address in New Brunswick, and 1,754 emergency medicine physician records in New Jersey.
All 1,754 in New Jersey → Every provider in New Brunswick → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Rajiv Arya, MDNew Brunswick, NJ 089011770659971
- Prashant Chutke, M.D.New Brunswick, NJ 089011083782312
- Frank Dos Santos, DONew Brunswick, NJ 089011821071614
- Mervin Griffin, MDNew Brunswick, NJ 089011487636726
- Janos Jeges, MDNew Brunswick, NJ 089011063421998
- John Lopez, MDNew Brunswick, NJ 089011255430179
- Jonathan McCoyNew Brunswick, NJ 089011255351318
- Daniel Morrison, MDNew Brunswick, NJ 089011205895919
Common questions
What is Mary Jean O, MD's NPI number?
Mary Jean O, MD's National Provider Identifier (NPI) is 1912133810, issued on Jun 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mary Jean O, MD located?
The NPPES record lists a practice address at 1 Robert Wood Johnson PL, New Brunswick, NJ, 08901. Phone: (732) 937-8700. Providers update this record themselves, so call before visiting.
How can I verify Mary Jean O, MD's license?
NPPES lists New Jersey license number 25MA09247300, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Jean O, MD prescribe under Medicare Part D?
In 2024, Mary Jean O, MD had 255 Medicare Part D claims for 142 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Mary Jean O, MD's MIPS final score?
The 2023 MIPS final score is 84.5 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.