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

Greg William McCormack, MD

Individual provider Medical Oncology Physician · NPI 1861750788

Greg William McCormack, MD is a Medical Oncology Physician in Frederic, Wisconsin. Practices as a sole proprietor. Licensed in Wisconsin.

Licensed in
WI
In the registry since
2012
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

20911 Sunset Lndg
Frederic, WI 54837-9055
Phone: (715) 327-8045
Show map & directions

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

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 47030-20 (WI)

Record details

NPI number1861750788
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 28, 2012
Last updated in NPPESMarch 7, 2023
Mailing address20911 Sunset Lndg, Frederic, WI 54837-9055