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

Mr. Zachary S Siehoff, DO

Individual provider Internal Medicine Physician · NPI 1639437999

Mr. Zachary S Siehoff, DO is a Hospitalist in Milwaukee, Wisconsin. Qualified in 2012, 14 years ago. Practices with Aurora Medical Group, Inc, a 3,741-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
14
Licensed in
WI
In the registry since
2012
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

2900 W Oklahoma Ave
Milwaukee, WI 53215
Phone: (414) 649-6000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1775 Ballard Rd, Park Ridge, IL 60068-1005 — (847) 318-9340
  • 1775 Ballard Rd, Park Ridge, IL 60068-1005 — (847) 318-9340

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 63885 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 63885 (WI)

Record details

NPI number1639437999
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 24, 2012
Last updated in NPPESJuly 12, 2024
Certification dateJuly 12, 2024
Mailing addressPo Box 735044, Chicago, IL 60673-5044

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Aurora Medical Group, Inc. — 3741 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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