Siegfried Yu, M.D.
Gastroenterology Physician · La Crosse, WI
Siegfried Yu, M.D. is a gastroenterology physician with a practice address in La Crosse, Wisconsin, and NPI 1386842565, issued on Jul 10, 2007. Check the license (Wisconsin 71105, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Siegfried Yu
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 71105 WI
069465 GA
125-053469 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1836 South Ave, La Crosse, WI 54601
- Phone
- (608) 782-7300
- Enumerated
- Jul 10, 2007
- Record last updated
- Aug 14, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 036125897 IL
- Medicare enrollment
- Enrolled (PECOS I20200803001257); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
Also registered at 1836 South Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frank Aberger, MDGastroenterology Physician1396748711
- Bradley Abicht, DPMPodiatrist1962632166
- Carter Abicht, DOAnesthesiology Physician1932736642
- Grace AbichtCertified Registered Nurse Anesthetist1003651555
- Paul Abicht, CRNACertified Registered Nurse Anesthetist1528061843
- Mateen Abidi, M.DCardiovascular Disease Physician1730333980
Verify Siegfried Yu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 71105Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average gastroenterology physician in 2024
703 Medicare Part D claims for 405 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Peg-3350 And Electrolytes162 claims
- Omeprazole90 claims
- Gavilyte-G76 claims
- Gavilyte-C70 claims
- Linzess53 claims
- Xifaxan40 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Gundersen Clinic LtdLa Crosse, WI
- Gundersen Lutheran Medical Center IncWinona, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siegfried Yu among 340 gastroenterology physician records in Wisconsin
Siegfried Yu, M.D. is one of 340 gastroenterology physician records with a practice address in Wisconsin. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 36% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2005 · median 2003 among the 239 with a school on file
- Record last updated2019 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Wisconsin
There are 340 gastroenterology physician records in Wisconsin.
All 340 in Wisconsin → Every provider in La Crosse → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Frank Aberger, MDLa Crosse, WI 546011396748711
- Heather Chial, MDLa Crosse, WI 546011427053768
- Gregory Cramer, MDLa Crosse, WI 546011104807833
- Milan Folkers, MDLa Crosse, WI 546011619064094
- Yonas Getachew, M.D.La Crosse, WI 546011669499000
- James Groskreutz, MDLa Crosse, WI 546011548265127
- Michael Henry, MDLa Crosse, WI 546011366447815
- Kenneth Horth, MDLa Crosse, WI 546011154326684
Common questions
What is Siegfried Yu, M.D.'s NPI number?
Siegfried Yu, M.D.'s National Provider Identifier (NPI) is 1386842565, issued on Jul 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Siegfried Yu, M.D. located?
The NPPES record lists a practice address at 1836 South Ave, La Crosse, WI, 54601. Phone: (608) 782-7300. Providers update this record themselves, so call before visiting.
How can I verify Siegfried Yu, M.D.'s license?
NPPES lists Wisconsin license number 71105, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Siegfried Yu, M.D. prescribe under Medicare Part D?
In 2024, Siegfried Yu, M.D. had 703 Medicare Part D claims for 405 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.