Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Sandra Ann Sieck, MD

Individual provider Internal Medicine Physician · NPI 1528609039

Dr. Sandra Ann Sieck, MD practises Internal Medicine in LA Crosse, Wisconsin. Graduated from University of Missouri, Kansas City, School of Medicine in 1989, 37 years ago. Practices with Gundersen Lutheran Medical Center Inc, a 896-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
37
Trained at
University of Missouri, Kansas City, School of Medicine
Licensed in
WI
In the registry since
2019
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

1836 S Ave
LA Crosse, WI 54601-5429
Phone: (608) 782-7300
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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 59976 (WI)

Record details

NPI number1528609039
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2019
Last updated in NPPESOctober 5, 2019

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MISSOURI, KANSAS CITY, SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Gundersen Lutheran Medical Center Inc — 896 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients217
Services billed 224 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Gundersen Lutheran Medical Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 896 clinicians in the practice; 12 are shown here.

Other providers in LA Crosse