Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John R Gassner, MD

Individual provider Diagnostic Radiology Physician · NPI 1588600696

John R Gassner, MD is a Diagnostic Radiology Physician in Green Bay, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2006.

Licensed in
WI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1789 Shawano Ave
Green Bay, WI 54303
Phone: (920) 499-1428
Fax: (920) 499-5808
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 28941020 (WI)

Record details

NPI number1588600696
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 20, 2006
Last updated in NPPESOctober 8, 2009
Mailing addressPo Box 3006, Green Bay, WI 54303

Other providers in Green Bay