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

Michael J O'Brien, MD

Individual provider Internal Medicine Physician · NPI 1144203241

Michael J O'Brien, MD is an Internal Medicine Physician in LA Crosse, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2005.

Licensed in
WI
In the registry since
2005
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

700 W Ave S
LA Crosse, WI 54601-4783
Phone: (608) 785-0940
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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 29161 (WI)

Record details

NPI number1144203241
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 22, 2005
Last updated in NPPESJanuary 20, 2020
Certification dateJanuary 20, 2020
Mailing addressPo Box 1510, Eau Claire, WI 54702-1510

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