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

Mark L Thayer, MD

Individual provider Emergency Medicine Physician · NPI 1568424778

Mark L Thayer, MD is an Emergency Medicine Physician in Grantsburg, Wisconsin. Licensed in Minnesota and Wisconsin. Registered with an NPI since 2006.

Licensed in
MN, WI
In the registry since
2006
Specialties on file
3
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

257 W Saint George Ave
Grantsburg, WI 54840-7827
Phone: (715) 463-5353
Fax: (715) 463-2753
Show map & directions

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

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 32528 (WI)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 32528 (WI)
Surgery Physician Taxonomy 208600000X · Licence 31570 (MN)

Record details

NPI number1568424778
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 4, 2006
Last updated in NPPESJuly 21, 2022
Mailing address257 W Saint George Ave, Grantsburg, WI 54840-7827