Carolyn J. O'Connor, MD
Internal Medicine Physician · Southbury, CT
Carolyn J. O'Connor, MD is an internal medicine physician with a practice address in Southbury, Connecticut, and NPI 1851328413, issued on Jun 27, 2006. Check the license (Connecticut 041131, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Carolyn J. O'Connor
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 041131 CT
Self-reported in NPPES; status is on the state search - Practice location
- 385 Main St S, Southbury, CT 06488
- Phone
- (203) 262-4600
- Enumerated
- Jun 27, 2006
- Record last updated
- Oct 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 001411313 CT
- Medicare enrollment
- Enrolled (PECOS I20110422000299); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 385 Main St S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Carolyn J. O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 041131Check 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 internal medicine physician in 2024
3,585 Medicare Part D claims for 464 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium329 claims
- Amlodipine Besylate294 claims
- Levothyroxine Sodium256 claims
- Lisinopril242 claims
- Rosuvastatin Calcium183 claims
- Hydrochlorothiazide168 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: $46.75
2 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Trinity Health OF New England Provider Network Organization IncWaterbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carolyn J. O'Connor among 2,623 internal medicine physician records in Connecticut
Carolyn J. O'Connor, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2004 among the 1,646 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 internal medicine physician records list a practice address in Southbury
They are 19 of the 520 NPPES records with a practice address in Southbury, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Southbury → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Florentino Abueg, MDSouthbury, CT 064881649372558
- Mary AquaviaSouthbury, CT 064881982791547
- Richard Biondi, M.D.Southbury, CT 064881619931623
- Jane HunterSouthbury, CT 064881275621625
- Dileema KalansuriyaSouthbury, CT 064881972785608
- Grazyna Kaszycki, MDSouthbury, CT 064881710900055
- Mary Miller, MDSouthbury, CT 064881063437820
- Jonathan Mosovich, M.D.Southbury, CT 064881851578660
Common questions
What is Carolyn J. O'Connor, MD's NPI number?
Carolyn J. O'Connor, MD's National Provider Identifier (NPI) is 1851328413, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carolyn J. O'Connor, MD located?
The NPPES record lists a practice address at 385 Main St S, Southbury, CT, 06488. Phone: (203) 262-4600. Providers update this record themselves, so call before visiting.
How can I verify Carolyn J. O'Connor, MD's license?
NPPES lists Connecticut license number 041131, 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 Carolyn J. O'Connor, MD prescribe under Medicare Part D?
In 2024, Carolyn J. O'Connor, MD had 3,585 Medicare Part D claims for 464 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.