Siwen Liu, D.O.
NPI 1972037158 · Surgery Physician · Baldwin, WI
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siwen Liu, D.O. is a Surgery Physician provider in Baldwin, WI (NPI 1972037158).
Provider details
- NPI number
- 1972037158
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 81075 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,987 across 15 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 2601 E Roosevelt StMaricopa Integrated Health SystemPhoenix, AZ 85008-4973Phone: (602) 344-5445Fax: (602) 344-1185
- 100 Woods RdValhalla, NY 10595-1530Phone: (914) 493-7000
Registry dates
- Enumerated
- 2017-04-14
- Last updated
- 2023-12-29
- Certified
- 2023-12-29
Frequently asked questions
- What is Siwen Liu's NPI number?
- Siwen Liu's National Provider Identifier (NPI) is 1972037158, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siwen Liu's specialty?
- Siwen Liu is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Siwen Liu located?
- Siwen Liu's practice location on file with NPPES is 1100 Bergslien St, Baldwin, WI 54002-2600.
- What is Siwen Liu's phone number?
- The practice phone number listed in the NPPES registry for Siwen Liu is (715) 684-1111.
- Does Siwen Liu accept Medicare?
- Siwen Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siwen Liu's NPI active?
- Yes — Siwen Liu's NPI (1972037158) is active in the NPPES registry as of the last update on 2023-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.