Joseph Regan, M.D.
Surgery Physician · Mequon, WI
Joseph Regan, M.D. is a surgery physician with a practice address in Mequon, Wisconsin, and NPI 1639116486, issued on Jun 1, 2006. Check the license (Wisconsin 45445, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Joseph Regan
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 45445 WI
Self-reported in NPPES; status is on the state search - Practice location
- 13133 N. Port Washington Road, Mequon, WI 53097
- Phone
- (262) 240-0070
- Enumerated
- Jun 1, 2006
- Entity
- Type 1 · individual
Also registered at 13133 N. Port Washington Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Cattey, MDSurgery Physician1548294960
- Srihari Ramanujam, MDGastroenterology Physician1568534824
Verify Joseph Regan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 45445Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
48% fewer Medicare Part D claims than the average surgery physician in 2024
90 Medicare Part D claims for 66 beneficiaries, against an average of 174 among the 21,427 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 61 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen39 claims
- Ondansetron Odt14 claims
- Oxycodone Hcl14 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.
The practice group's Medicare quality score for 2023: 81.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $35.71
1 payment, mostly food and beverage; the largest payer was Medtronic, Inc.. The 19,002 providers of this specialty with any payment received $3,758.86 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.
One hospital or facility affiliation
- Madison Medical Affiliates IncMequon, WI
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Surgery Physician providers in Wisconsin
There are 786 surgery physician records in Wisconsin.
Other surgery physician records in Wisconsin
- Michael AabergMadison, WI1346991064
- Benjamin Abadeer, DOAppleton, WI1255541603
- Warren Abell, DOOsceola, WI1265407662
- Alexandra Acher, M.D.Madison, WI1487018008
- Marina Affi Koprowski, M.D.Milwaukee, WI1275065575
- Kaleem Ahmed, MD, MSAIMadison, WI1215780671
- David Al-Adra, MDMadison, WI1093224776
- Talal Al-Qaoud, MDMadison, WI1376093716
- Luis Alamo IrizarryMadison, WI1235639410
- Charles Alden, M.D.Wausau, WI1043212947
Common questions
What is Joseph Regan, M.D.'s NPI number?
Joseph Regan, M.D.'s National Provider Identifier (NPI) is 1639116486, issued on Jun 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Regan, M.D. located?
The NPPES record lists a practice address at 13133 N. Port Washington Road, Mequon, WI, 53097. Phone: (262) 240-0070. Providers update this record themselves, so call before visiting.
How can I verify Joseph Regan, M.D.'s license?
NPPES lists Wisconsin license number 45445, 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 Joseph Regan, M.D. prescribe under Medicare Part D?
In 2024, Joseph Regan, M.D. had 90 Medicare Part D claims for 66 beneficiaries; the average among surgery physician prescribers was 174. Part D covers Medicare prescriptions only.
What is Joseph Regan, M.D.'s Medicare quality score?
The 2023 MIPS final score is 81.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.