John J. O'Brien, MD
Orthopaedic Surgery Physician · Hartford, CT
John J. O'Brien, MD is an orthopaedic surgery physician with a practice address in Hartford, Connecticut, and NPI 1992769087, issued on Apr 14, 2006. Check the license (Connecticut 15927, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John J. O'Brien
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- 15927 CT
Self-reported in NPPES; status is on the state search - Practice location
- 80 Seymour Street, Hartford, CT 06102
- Phone
- (860) 972-2245
- Enumerated
- Apr 14, 2006
- Record last updated
- Feb 7, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 1159276 CT
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 348 in Connecticut → Look up another NPI →
Also registered at 80 Seymour Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lincoln Abbott, MDEmergency Medicine Physician1518965433
- Marie Achong, M.D.Obstetrics & Gynecology Physician1700806213
- Allison Adajian, PA-CSurgical Physician Assistant1619129582
- Clark Adams, PA-CPhysician Assistant1245329457
- Swetha Ade, M.D.Epilepsy Physician1801155296
- Ross Albert, MDHospice and Palliative Medicine (Family Medicine) Physician1124291448
Verify John J. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 15927Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
11 Medicare Part D claims, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
John J. O'Brien among 348 orthopaedic surgery physician records in Connecticut
John J. O'Brien, MD is one of 348 orthopaedic surgery physician records with a practice address in Connecticut. 76% 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 21% of them.
- NPI issued2006 · 21% of these records are older, 37% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2016 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Connecticut
There are 348 orthopaedic surgery physician records in Connecticut.
All 348 in Connecticut → Every provider in Hartford → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- John Banta, MDHartford, CT 061021750353538
- Richard Fischer, M.D.Hartford, CT 061021245348507
- Amanda Fantry, M.D.Hartford, CT 061051992098123
- Matthew Grosso, M.D.Hartford, CT 061051316366792
- Todd Mailly, MDHartford, CT 061051598833022
- Daryle Ruark, MDHartford, CT 061051831174846
- Eric Silverstein, MDHartford, CT 061051598719320
- Ross Benthien, MDHartford, CT 061061770580003
Common questions
What is John J. O'Brien, MD's NPI number?
John J. O'Brien, MD's National Provider Identifier (NPI) is 1992769087, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John J. O'Brien, MD located?
The NPPES record lists a practice address at 80 Seymour Street, Hartford, CT, 06102. Phone: (860) 972-2245. Providers update this record themselves, so call before visiting.
How can I verify John J. O'Brien, MD's license?
NPPES lists Connecticut license number 15927, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John J. O'Brien, MD prescribe under Medicare Part D?
In 2024, John J. O'Brien, MD had 11 Medicare Part D claims; the average among orthopaedic surgery physician prescribers was 346. 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.