Donald Hennessy, M.D.
Internal Medicine Physician · Cedarburg, WI
Donald Hennessy, M.D. is an internal medicine physician with a practice address in Cedarburg, Wisconsin, and NPI 1811960495, issued on Feb 13, 2006. Check the license (Wisconsin 23781, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Donald Hennessy
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 23781 WI
Self-reported in NPPES; status is on the state search - Practice location
- N143W6515 Pioneer RD, Cedarburg, WI 53012
- Phone
- (262) 377-6933
- Enumerated
- Feb 13, 2006
- Entity
- Type 1 · individual
Also registered at N143W6515 Pioneer RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Donald Hennessy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 23781Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Internal Medicine Physician providers in Wisconsin
There are 2,832 internal medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other internal medicine physician records in Wisconsin
- Sheetal Aatrai, MDMarshfield, WI1417568965
- Noormuhammad Abbasakoor, M.D.Sheboygan, WI1558645895
- Khalid Abdelgadir, MDManitowoc, WI1407433295
- Kareem Abdelhadi, MDRice Lake, WI1841494432
- Mesfin Abdissa, MDMilwaukee, WI1376579417
- Mohamed Fouzi Abdul Hameed, M.D.Weston, WI1255590899
- Hamza Abdul Majeed, DOMilwaukee, WI1881013282
- Anas Abed, MDMadison, WI1659002566
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- Vincent Abejuela, DOMilwaukee, WI1356928543
Common questions
What is Donald Hennessy, M.D.'s NPI number?
Donald Hennessy, M.D.'s National Provider Identifier (NPI) is 1811960495, issued on Feb 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald Hennessy, M.D. located?
The NPPES record lists a practice address at N143W6515 Pioneer RD, Cedarburg, WI, 53012. Phone: (262) 377-6933. Providers update this record themselves, so call before visiting.
How can I verify Donald Hennessy, M.D.'s license?
NPPES lists Wisconsin license number 23781, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.