Patrick Gerard Oconnor, MD
Internal Medicine Physician · New Haven, CT
Patrick Gerard Oconnor, MD is an internal medicine physician with a practice address in New Haven, Connecticut, and NPI 1689657819, issued on Nov 22, 2005. Check the license (Connecticut 027228, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Patrick Gerard Oconnor
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 027228 CT
Self-reported in NPPES; status is on the state search - Practice location
- 789 Howard Ave, New Haven, CT 06519
- Phone
- (203) 688-2471
- Enumerated
- Nov 22, 2005
- Record last updated
- Mar 14, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (203) 688-4516
- Medicaid IDs
- 001272286 CT
004217099 CT - Medicare enrollment
- Enrolled (PECOS I20100312000808); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1982
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 789 Howard Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Patrick Gerard Oconnor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 027228Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
205 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate26 claims
- Lisinopril25 claims
- Omeprazole17 claims
- Symbicort13 claims
- Atorvastatin Calcium12 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: $184.99
2 payments; by number, the most common kind was food and beverage; the largest payer was Kerecis Limited. 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
- Cornell Scott Hill Health CorporationNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick Gerard Oconnor among 2,623 internal medicine physician records in Connecticut
Patrick Gerard Oconnor, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 1,646 with a school on file
- Record last updated2019 · 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).
329 internal medicine physician records list a practice address in New Haven
They are 329 of the 9,793 NPPES records with a practice address in New Haven, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in New Haven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Oluremi AliyuNew Haven, CT 065191023083771
- Tracy Battaglia, M.D.New Haven, CT 065191174508543
- Sarwat Chaudhry, MDNew Haven, CT 065191225011448
- Matthew Ellman, MDNew Haven, CT 065191215919642
- David Fiellin, MDNew Haven, CT 065191194700666
- Joanne Foodim, MDNew Haven, CT 065191780663237
- Sally Haskell, MDNew Haven, CT 065191336119411
- Janet Henrich, MDNew Haven, CT 065191679556807
Common questions
What is Patrick Gerard Oconnor, MD's NPI number?
Patrick Gerard Oconnor, MD's National Provider Identifier (NPI) is 1689657819, issued on Nov 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Gerard Oconnor, MD located?
The NPPES record lists a practice address at 789 Howard Ave, New Haven, CT, 06519. Phone: (203) 688-2471. Providers update this record themselves, so call before visiting.
How can I verify Patrick Gerard Oconnor, MD's license?
NPPES lists Connecticut license number 027228, 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 Patrick Gerard Oconnor, MD prescribe under Medicare Part D?
In 2024, Patrick Gerard Oconnor, MD had 205 Medicare Part D claims for 16 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.