John R. Gassner, MD
Diagnostic Radiology Physician · Green Bay, WI
John R. Gassner, MD is a diagnostic radiology physician with a practice address in Green Bay, Wisconsin, and NPI 1588600696, issued on Jun 20, 2006. Check the license (Wisconsin 28941020, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John R. Gassner
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 28941020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1789 Shawano Ave, Green Bay, WI 54303
- Phone
- (920) 499-1428
- Enumerated
- Jun 20, 2006
- Record last updated
- Oct 8, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (920) 499-5808
- Medicaid ID
- 31496900 WI
- Entity
- Type 1 · individual
Also registered at 1789 Shawano Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeff Arnholt, MD, PHDDiagnostic Radiology Physician1144206814
- Bela Ballo, MDDiagnostic Radiology Physician1275551160
- Jesse Borman, MDDiagnostic Radiology Physician1508046418
- Patrick Carrigan, MDDiagnostic Radiology Physician1063447423
- Douglas Coyle, MDDiagnostic Radiology Physician1912932054
- Gregory Grewe, MDDiagnostic Radiology Physician1306871769
Verify John R. Gassner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 28941020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53 diagnostic radiology physician records list a practice address in Green Bay
They are 53 of the 4,619 NPPES records with a practice address in Green Bay, 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 53 in Green Bay → All 1,005 in Wisconsin → Every provider in Green Bay →
Other diagnostic radiology physician records in Wisconsin
- Ibrahim AbdallaMadison, WI1467266809
- James Aceto, M.D.Mequon, WI1609858158
- Mohit Agarwal, MDMilwaukee, WI1265864169
- Sarah Agnew, RT (R).Madison, WI1730742776
- Serra Aktan, MDMadison, WI1427589662
- Maysoon Al-Hihi, MDMilwaukee, WI1093741399
- Giustino Albanese, M.D.Madison, WI1265634307
- Philip Albert, M.D.Wausau, WI1073619623
- Saad Ali, M.D.Milwaukee, WI1467617662
- Hailey Allen, M.D.Madison, WI1619235157
Common questions
What is John R. Gassner, MD's NPI number?
John R. Gassner, MD's National Provider Identifier (NPI) is 1588600696, issued on Jun 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John R. Gassner, MD located?
The NPPES record lists a practice address at 1789 Shawano Ave, Green Bay, WI, 54303. Phone: (920) 499-1428. Providers update this record themselves, so call before visiting.
How can I verify John R. Gassner, MD's license?
NPPES lists Wisconsin license number 28941020, 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.