Timothy Tsai, APRN, FNP-C, MSN
- Part D claims, 2024
- 2,721
- Industry payments
- $129
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2015
- Practice address
- 39500 Liberty Street, Fremont, CA 94538
- Practice phone
- Call (510) 770-8133
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
BACH Liberty Clinic
FQHC - Main Site · Fremont, California
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Timothy Tsai is a family nurse practitioner in Fremont, California
Timothy Tsai practices at BACH Liberty Clinic in Fremont, California.
Timothy Tsai's NPI, 1669844890, was assigned on October 27, 2015. Timothy Tsai holds Hawaii license 1995.
- NPI
- 1669844890NPI Registry (opens in a new tab)
- NPI enumeration date
- October 27, 2015
- NPI status
- Active
- Practice phone
- (510) 770-8133
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Timothy Tsai practices at BACH Liberty Clinic in Fremont, California
Timothy Tsai's primary practice is BACH Liberty Clinic, at 39500 Liberty Street, Fremont, CA 94538 in Alameda County. The practice phone is (510) 770-8133.
- BACH Liberty Clinic39500 Liberty Street, Fremont, CA 94538 · Alameda CountyPhone(510) 770-8133
Source: Dmand AI Affiliation Data
Timothy Tsai is affiliated with 1 site of care
Timothy Tsai's primary practice is BACH Liberty Clinic in Fremont, California. Timothy Tsai's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Timothy Tsai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Timothy Tsai practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| BACH Liberty Clinic | Available with a free account |
Source: Dmand AI Technology Install Data
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Timothy Tsai is one of 13,532 family nurse practitioners in California
Family is Timothy Tsai's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Timothy Tsai is board certified in family nurse practitioner by the American Academy of Nurse Practitioners Certification Program (AANPCP). Timothy Tsai is licensed in Hawaii.
Specialties and state licenses
- Family nurse practitioner, HawaiiPrimary
Family nurse practitioners near Timothy Tsai
Counts of family nurse practitioners 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
Timothy Tsai's patients have a median age of 55
Across all payers, Dmand AI patient panel data puts Timothy Tsai's median patient age at 55, with 55% women.
Timothy Tsai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Timothy Tsai wrote 2,721 Medicare Part D claims in 2024
In 2024, Timothy Tsai wrote 2,721 Medicare Part D claims for 296 patients. 84% of them were for generic drugs. CMS names the drug for 2,203 of them, across 63 drugs with 11 or more claims each, at $167,709 in total drug cost.
Timothy Tsai's Part D claims by kind of drug, 2024
- Generic2,282 claims84%
- Brand-name375 claims14%
- Other64 claims2%
Timothy Tsai'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 Timothy Tsai's Part D claims, 2024
- Opioids1%34 of 2,721 claims
- Antibiotics1%38 of 2,721 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
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Timothy Tsai received $129 in industry payments in 2025
CMS Open Payments shows 5 general payments to Timothy Tsai from 5 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $36.
Companies that paid Timothy Tsai the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Timothy Tsai is board certified in family nurse practitioner
- Board certified in family nurse practitioner
Source: Dmand AI Professional Profile Data
Sources for Timothy Tsai'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) |
| 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 Timothy Tsai
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Timothy Tsai's NPI number?
Timothy Tsai's NPI number is 1669844890. It was assigned on October 27, 2015, and it is active in the NPI Registry.
What does Timothy Tsai specialize in?
Timothy Tsai is a family nurse practitioner in Fremont, California. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Timothy Tsai practice?
Timothy Tsai practices at 39500 Liberty Street, Fremont, CA 94538. Timothy Tsai's primary practice is BACH Liberty Clinic in Fremont, California.
What is Timothy Tsai's office phone number?
The practice phone on file for Timothy Tsai is (510) 770-8133.
What is Timothy Tsai's medical license number?
Timothy Tsai holds Hawaii license 1995.
Is Timothy Tsai board certified?
Yes. Timothy Tsai is board certified in family nurse practitioner by the American Academy of Nurse Practitioners Certification Program (AANPCP).
What drugs does Timothy Tsai prescribe most?
In 2024 Medicare Part D data, Timothy Tsai's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Timothy Tsai received payments from drug or device companies?
CMS Open Payments shows $129 in general payments to Timothy Tsai from 5 companies from 2025 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Timothy Tsai been practicing?
Timothy Tsai's NPI was assigned in 2015.
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