Hui-Shan A. Wen, DO
Hospitalist Physician · San Rafael, CA
Hui-Shan A. Wen, DO is a hospitalist physician with a practice address in San Rafael, California, and NPI 1598843070, issued on Nov 1, 2006. Check the license (California 20A9083, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hui-Shan A. Wen
- Credential
- DO
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 20A9083 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 Montecillo RD, San Rafael, CA 94903
- Phone
- (415) 444-4885
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070125000118); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 99 Montecillo RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paul Alpert, MDUrology Physician1417031402
Verify Hui-Shan A. Wen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9083Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average hospitalist physician in 2024
376 Medicare Part D claims for 146 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxycycline Monohydrate31 claims
- Cefuroxime22 claims
- Torsemide21 claims
- Atorvastatin Calcium19 claims
- Cefadroxil14 claims
- Atropine Sulfate11 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: $35.72
2 payments; by number, the most common kind was food and beverage; the largest payer was Virtus Pharmaceuticals LLC. The 7,324 providers of this specialty with any payment received $494.84 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
- Permanente Medical Group IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hui-Shan A. Wen among 3,099 hospitalist physician records in California
Hui-Shan A. Wen, DO is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2003 · median 2010 among the 2,505 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in San Rafael → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Gregory Arent, MDSan Rafael, CA 949031245314210
- Ingrid Brennan, MDSan Rafael, CA 949031518046655
- Anne-Maree Cantwell, MDSan Rafael, CA 949031679657670
- Siraphob Chansangavej, MDSan Rafael, CA 949031386268027
- Viet Lam, MDSan Rafael, CA 949031942384011
- Jeffrey Lovold, MDSan Rafael, CA 949031376627356
- Robert Lowell, MDSan Rafael, CA 949031053495051
- Stephen Mizroch, MDSan Rafael, CA 949031225112394
Common questions
What is Hui-Shan A. Wen, DO's NPI number?
Hui-Shan A. Wen, DO's National Provider Identifier (NPI) is 1598843070, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Hui-Shan A. Wen, DO located?
The NPPES record lists a practice address at 99 Montecillo RD, San Rafael, CA, 94903. Phone: (415) 444-4885. Providers update this record themselves, so call before visiting.
How can I verify Hui-Shan A. Wen, DO's license?
NPPES lists California license number 20A9083, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hui-Shan A. Wen, DO prescribe under Medicare Part D?
In 2024, Hui-Shan A. Wen, DO had 376 Medicare Part D claims for 146 beneficiaries; the average among hospitalist physician prescribers was 521. 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.