William Vay Tsu, PA
- Part D claims, 2024
- 248
- Industry payments
- $137
- Affiliated sites
- 2
- Medical groups
- 2
- State license
- 1
- Practice address
- 2238 Geary Blvd, San Francisco, CA 94115
- Practice phone
- Call (415) 833-3700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
San Francisco Medical Center - Mammography
Mammography / Breast Imaging Center · San Francisco, California
Find William Tsu's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
William Vay Tsu is a physician assistant in San Francisco, California
William Tsu practices at San Francisco Medical Center - Mammography in San Francisco, California.
William Tsu's NPI, 1912256439, was assigned on August 29, 2012.
- NPI
- 1912256439NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890912091
- NPI enumeration date
- August 29, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 833-3700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Vay Tsu practices at San Francisco Medical Center - Mammography in San Francisco, California
William Tsu's primary practice is San Francisco Medical Center - Mammography, at 2238 Geary Blvd, San Francisco, CA 94115. The practice phone is (415) 833-3700.
- San Francisco Medical Center - Mammography2238 Geary Blvd, San Francisco, CA 94115Phone(415) 833-3700
Source: Dmand AI Affiliation Data
William Vay Tsu is affiliated with 2 sites of care and 2 medical groups
William Tsu's primary practice is San Francisco Medical Center - Mammography in San Francisco, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links William Tsu to 1 more group practice or clinic and 1 medical group, each named with a free account. William Tsu's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William Vay Tsu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Tsu practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Francisco Medical Center - Mammography | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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William Vay Tsu is one of 11,482 physician assistants in California
Physician assistant is William Tsu's primary specialty in the NPI Registry, under taxonomy code 363A00000X. William Tsu is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). William Tsu has a license on file in California.
Specialties and state licenses
- Physician assistant, California
Clinical focus
Dmand AI lists rotator cuff injury among the conditions William Tsu treats.
Physician assistants near William Tsu
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
William Vay Tsu's patients have a median age of 39
Across all payers, Dmand AI patient panel data puts William Tsu's median patient age at 39, with 58% women.
William Tsu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women58%
- Men40%
Source: Dmand AI Patient Panel Data
William Vay Tsu wrote 248 Medicare Part D claims in 2024
In 2024, William Tsu wrote 248 Medicare Part D claims for 172 patients. 83% of them were for generic drugs. CMS names the drug for 76 of them, across 5 drugs with 11 or more claims each, at $1,194 in total drug cost.
William Tsu's Part D claims by kind of drug, 2024
- Generic206 claims83%
- Brand-name42 claims17%
William Tsu's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in William Tsu's Part D claims, 2024
- Antibiotics18%45 of 248 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How William Vay Tsu takes part in Medicare
William Tsu accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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William Vay Tsu received $137 in industry payments in 2024
CMS Open Payments shows 1 general payment to William Tsu from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $137.
Companies that paid William Tsu the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
William Vay Tsu is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for William Vay Tsu's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about William Vay Tsu
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Vay Tsu's NPI number?
William Vay Tsu's NPI number is 1912256439. It was assigned on August 29, 2012, and it is active in the NPI Registry.
What does William Vay Tsu specialize in?
William Vay Tsu is a physician assistant in San Francisco, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does William Vay Tsu practice?
William Tsu practices at 2238 Geary Blvd, San Francisco, CA 94115. William Tsu's primary practice is San Francisco Medical Center - Mammography in San Francisco, California. Dmand AI also links William Tsu to 1 group practice or clinic and 1 medical group.
What is William Vay Tsu's office phone number?
The practice phone on file for William Tsu is (415) 833-3700.
What medical group is William Vay Tsu part of?
William Tsu is linked to The Permanente Medical Group, Inc. Dmand AI links William Tsu to 1 more medical group.
Does William Vay Tsu accept Medicare?
Yes. CMS lists William Tsu as accepting Medicare assignment.
Is William Vay Tsu board certified?
Yes. William Tsu is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What drugs does William Vay Tsu prescribe most?
In 2024 Medicare Part D data, William Tsu's most prescribed drugs by claims were Albuterol Sulfate Hfa, Hydrocortisone and Fluocinonide.
Has William Vay Tsu received payments from drug or device companies?
CMS Open Payments shows $137 in general payments to William Tsu from 1 company from 2024 to 2024. The largest total came from Abbvie Inc.
How long has William Vay Tsu been practicing?
William Tsu graduated from medical school in 2012, 14 years ago.
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