Paul O'Neill, M.D.
Internal Medicine Physician · Waukesha, WI
Paul O'Neill, M.D. is an internal medicine physician with a practice address in Waukesha, Wisconsin, and NPI 1821062225, issued on Feb 14, 2006. Check the license (Wisconsin 33540, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Paul O'Neill
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 33540 WI
Self-reported in NPPES; status is on the state search - Practice location
- N14W23900 Stone Ridge Dr, Waukesha, WI 53188
- Phone
- (262) 549-3030
- Enumerated
- Feb 14, 2006
- Record last updated
- Apr 24, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 31842000 WI
- Medicare enrollment
- Enrolled (PECOS I20100215000752); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at N14W23900 Stone Ridge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jean Bagin, NPNurse Practitioner1710947064
- William Boehm, M.D.Internal Medicine Physician1346213519
- Catherine Bril, PAPhysician Assistant1508828328
- Wendy Cooper, M.D.Internal Medicine Physician1720051824
- Tracy Coulter, D.P.M.Podiatrist1881661445
- Dorothy Delisle, M.D.Pediatrics Physician1699748137
Verify Paul O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 33540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.5 times the Medicare Part D claims of the average internal medicine physician in 2024
11,231 Medicare Part D claims for 790 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 305 claims were for opioids.
Most prescribed
- Atorvastatin Calcium619 claims
- Rosuvastatin Calcium435 claims
- Levothyroxine Sodium422 claims
- Lisinopril401 claims
- Tamsulosin Hcl385 claims
- Pantoprazole Sodium373 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.
Bills Medicare through one group practice
- Prohealth Medical Group IncOconomowoc, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Paul O'Neill among 2,078 internal medicine physician records in Wisconsin
Paul O'Neill, M.D. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1988 · median 2002 among the 1,098 with a school on file
- Record last updated2012 · 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 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 internal medicine physician records list a practice address in Waukesha
They are 42 of the 2,814 NPPES records with a practice address in Waukesha, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Waukesha → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gerald Berman, M.D.Waukesha, WI 531881215909734
- William Boehm, M.D.Waukesha, WI 531881346213519
- Wendy Cooper, M.D.Waukesha, WI 531881720051824
- Thomas Dougherty, MDWaukesha, WI 531881487639902
- John Fish, M.D.Waukesha, WI 531881033188446
- Thomas Gallagher, M.D.Waukesha, WI 531881942273677
- Peter Geiss, M.D.Waukesha, WI 531881881666782
- Martin Kern, MDWaukesha, WI 531881215938758
Common questions
What is Paul O'Neill, M.D.'s NPI number?
Paul O'Neill, M.D.'s National Provider Identifier (NPI) is 1821062225, issued on Feb 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Paul O'Neill, M.D. located?
The NPPES record lists a practice address at N14W23900 Stone Ridge Dr, Waukesha, WI, 53188. Phone: (262) 549-3030. Providers update this record themselves, so call before visiting.
How can I verify Paul O'Neill, M.D.'s license?
NPPES lists Wisconsin license number 33540, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Paul O'Neill, M.D. prescribe under Medicare Part D?
In 2024, Paul O'Neill, M.D. had 11,231 Medicare Part D claims for 790 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.