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

Jack Geiger, DO

Individual provider Internal Medicine Physician · NPI 1437852803

Jack Geiger, DO is a Hospitalist in Milwaukee, Wisconsin. Graduated from Midwestern University, Chicago College of Osteopathic Med in 2023, 3 years ago. Licensed in Wisconsin.

Years since qualifying
3
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
WI
In the registry since
2023
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

9200 W Wisconsin Ave
Milwaukee, WI 53226-3522
Phone: (414) 955-0350
Fax: (414) 955-0094
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 81692-021 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 81692-021 (WI)

Record details

NPI number1437852803
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 24, 2023
Last updated in NPPESJuly 2, 2026
Certification dateJuly 2, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolMIDWESTERN UNIVERSITY, CHICAGO COLLEGE OF OSTEOPATHIC MED
Graduated 2023 (3 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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