Gregory Allen Kass, M.D.
Diagnostic Radiology Physician · Waukesha, WI
Gregory Allen Kass, M.D. is a diagnostic radiology physician with a practice address in Waukesha, Wisconsin, and NPI 1063407666, issued on Sep 20, 2005. Check the license (Wisconsin 29928-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory Allen Kass
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 29928-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 725 American Ave, Waukesha, WI 53188
- Phone
- (262) 928-2400
- Enumerated
- Sep 20, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (262) 928-7621
- Medicaid ID
- 31524200 WI
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,005 in Wisconsin → Look up another NPI →
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Verify Gregory Allen Kass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 29928-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory Allen Kass among 1,005 diagnostic radiology physician records in Wisconsin
Gregory Allen Kass, M.D. is one of 1,005 diagnostic radiology physician records with a practice address in Wisconsin. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileNo · 68% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
40 diagnostic radiology physician records list a practice address in Waukesha
They are 40 of the 2,814 NPPES records with a practice address in Waukesha, and 1,005 diagnostic radiology physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,005 in Wisconsin → Every provider in Waukesha → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Jennifer Bergin, M.D.Waukesha, WI 531881093766172
- Gary Beyer, M.D.Waukesha, WI 531881396730958
- Robert Boex, M.D.Waukesha, WI 531881174518732
- David Czarnecki, M.D.Waukesha, WI 531881053306613
- Jeffrey Fete, M.D.Waukesha, WI 531881194711564
- Gregory Francken, M.D.Waukesha, WI 531881831184415
- Mark Hollister, M.D.Waukesha, WI 531881588659171
- Kathleen Klaas, M.D.Waukesha, WI 531881467447060
Common questions
What is Gregory Allen Kass, M.D.'s NPI number?
Gregory Allen Kass, M.D.'s National Provider Identifier (NPI) is 1063407666, issued on Sep 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Allen Kass, M.D. located?
The NPPES record lists a practice address at 725 American Ave, Waukesha, WI, 53188. Phone: (262) 928-2400. Providers update this record themselves, so call before visiting.
How can I verify Gregory Allen Kass, M.D.'s license?
NPPES lists Wisconsin license number 29928-020, 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), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.