Daniel William O'Neill, M.D.
Internal Medicine Physician · Putnam, CT
Daniel William O'Neill, M.D. is an internal medicine physician with a practice address in Putnam, Connecticut, and NPI 1972578508, issued on Feb 17, 2006. Check the license (Connecticut 036878, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Daniel William O'Neill
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036878 CT
Self-reported in NPPES; status is on the state search - Practice location
- 7 Kennedy Dr, Putnam, CT 06260
- Phone
- (860) 928-7704
- Enumerated
- Feb 17, 2006
- Record last updated
- Apr 8, 2026
- Fax
- (860) 928-4092
- Medicaid ID
- 002468788 CT
- Medicare enrollment
- Enrolled (PECOS I20090122000005); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 7 Kennedy Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maryam Abdishoo, NPFamily Nurse Practitioner1275143778
- Joseph Creme, M.D.Family Medicine Physician1699745604
- Stanley Koleszar, RN CRNPFamily Nurse Practitioner1972571354
- Daniel Storey, M.D.Family Medicine Physician1215252754
- Gerald Sullivan, MDFamily Medicine Physician1154396927
Verify Daniel William O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 036878Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.0 times the Medicare Part D claims of the average internal medicine physician in 2024
12,619 Medicare Part D claims for 781 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 642 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium588 claims
- Atorvastatin Calcium486 claims
- Metoprolol Succinate463 claims
- Levothyroxine Sodium339 claims
- Lisinopril325 claims
- Amlodipine Besylate321 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: $1,002.31
50 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer 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
- Day Kimball Medical Group IncPutnam, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
8 internal medicine physician records list a practice address in Putnam
They are 8 of the 512 NPPES records with a practice address in Putnam, and 2,623 internal medicine physician records in Connecticut.
All 8 in Putnam → All 2,623 in Connecticut → Every provider in Putnam →
Other internal medicine physician records in Connecticut
- Hoda Abdel Salam, M.D.New Britain, CT1144509316
- Gada Abdelhafiz, MDNew London, CT1467649558
- Racha Abi Melhem, MDDerby, CT1902471352
- Gerard Abidor, D.O.Bridgeport, CT1518014539
- Lilyan AbrahamFarmington, CT1447693254
- Richard Abraham, M.D.Canton, CT1023044252
- Odaliz Abreu-Lanfranco, MDNew Haven, CT1538276134
- Kenneth Abriola, MDGlastonbury, CT1083693022
- Florentino Abueg, MDSouthbury, CT1649372558
- Nila Aburto, MDStamford, CT1396325718
Common questions
What is Daniel William O'Neill, M.D.'s NPI number?
Daniel William O'Neill, M.D.'s National Provider Identifier (NPI) is 1972578508, issued on Feb 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel William O'Neill, M.D. located?
The NPPES record lists a practice address at 7 Kennedy Dr, Putnam, CT, 06260. Phone: (860) 928-7704. Providers update this record themselves, so call before visiting.
How can I verify Daniel William O'Neill, M.D.'s license?
NPPES lists Connecticut license number 036878, 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 Daniel William O'Neill, M.D. prescribe under Medicare Part D?
In 2024, Daniel William O'Neill, M.D. had 12,619 Medicare Part D claims for 781 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.