Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Siegfried Yu, MD

Individual provider Internal Medicine Physician · NPI 1386842565

Siegfried Yu, MD practises Gastroenterology in LA Crosse, Wisconsin. Qualified in 2005, 21 years ago. Practices with Gundersen Lutheran Medical Center Inc, a 896-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Georgia, Illinois and Wisconsin.

Years since qualifying
21
Licensed in
GA, IL, WI
In the registry since
2007
Specialties on file
3
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
Phone: (608) 782-7300
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1120 15th St # Ad-2226, Augusta, GA 30912-0004 — (706) 446-4887

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 71105 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 125-053469 (IL)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 069465 (GA)

Record details

NPI number1386842565
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2007
Last updated in NPPESAugust 14, 2019

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Gundersen Lutheran Medical Center Inc — 896 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 182 times · 89th percentile
Colonoscopy 104 times · 80th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients298
Services billed 756 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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