Siwen Liu, D.O.
Surgery Physician · Baldwin, WI
Siwen Liu, D.O. is a surgery physician with a practice address in Baldwin, Wisconsin, and NPI 1972037158, issued on Apr 14, 2017. Check the license (Wisconsin 81075, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Siwen Liu
- Credential
- D.O.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 81075 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Bergslien St, Baldwin, WI 54002
- Phone
- (715) 684-1111
- Enumerated
- Apr 14, 2017
- Record last updated
- Dec 29, 2023
- Fax
- (715) 684-1119
- Medicare enrollment
- Enrolled (PECOS I20230801002674); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 726 in Wisconsin → Look up another NPI →
Also registered at 1100 Bergslien St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Aluning, M.D.Pediatrics Physician1417362195
- Sarah Anderson, N.P.Family Nurse Practitioner1003242306
- Julie Andrzejczak, CNMAdvanced Practice Midwife1265170310
- Faisal Anwar, M.D.Internal Medicine Physician1558655878
- Abbey Arndt, NPFamily Nurse Practitioner1003508136
- Christopher Babbitt, PSYDClinical Psychologist1245232982
Verify Siwen Liu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 81075Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average surgery physician in 2024
67 Medicare Part D claims for 32 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass12 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.
Industry payments in 2024: $2,987.14
15 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Baldwin Area Medical Center IncBaldwin, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siwen Liu among 726 surgery physician records in Wisconsin
Siwen Liu, D.O. is one of 726 surgery physician records with a practice address in Wisconsin. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 83% of them.
- NPI issued2017 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2017 · median 2006 among the 446 with a school on file
- Record last updated2023 · 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 208600000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 surgery physician records list a practice address in Baldwin
They are 2 of the 119 NPPES records with a practice address in Baldwin, and 726 surgery physician records in Wisconsin.
All 726 in Wisconsin → Every provider in Baldwin → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Clint Semrau, DOBaldwin, WI 540021346465739
- Lorant Divald, M.D.Amery, WI 540011275859670
- James Quenan, MDAmery, WI 540011770556227
- Michael Schneider, MDAmery, WI 540011053475764
- Linda Serna, M.D.Amery, WI 540011639178635
- Anders Ulland, M.D.Amery, WI 540011376620351
- Kirk Jacobson, MDHudson, WI 540161508839994
- Michael Koeplin, M.D.Hudson, WI 540161649217274
Common questions
What is Siwen Liu, D.O.'s NPI number?
Siwen Liu, D.O.'s National Provider Identifier (NPI) is 1972037158, issued on Apr 14, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Siwen Liu, D.O. located?
The NPPES record lists a practice address at 1100 Bergslien St, Baldwin, WI, 54002. Phone: (715) 684-1111. Providers update this record themselves, so call before visiting.
How can I verify Siwen Liu, D.O.'s license?
NPPES lists Wisconsin license number 81075, 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 Siwen Liu, D.O. prescribe under Medicare Part D?
In 2024, Siwen Liu, D.O. had 67 Medicare Part D claims for 32 beneficiaries; the average among surgery physician prescribers was 147. 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.