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

Dr. Michael A Duffy, MD

Individual provider Internal Medicine Physician · NPI 1922113182

Dr. Michael A Duffy, MD is an Internal Medicine Physician in Oshkosh, Wisconsin. Licensed in Minnesota and Wisconsin. Registered with an NPI since 2006.

Licensed in
MN, WI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

855 N Westhaven Dr
Oshkosh, WI 54904-7668
Phone: (920) 303-8700
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 24370 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 25340 (MN)

Record details

NPI number1922113182
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 20, 2006
Last updated in NPPESMay 3, 2016
Mailing address855 N Westhaven Dr, Oshkosh, WI 54904-7668

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