Tsung Tsai, M.D.
NPI 1629250394 · General Practice Physician · Ontario, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tsung Tsai, M.D. is a General Practice Physician provider in Ontario, CA (NPI 1629250394).
Provider details
- NPI number
- 1629250394
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A114112 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
18 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 | $125 |
Typical Medicare-allowed amounts for these services range $125–$125 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 146 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 641 | 259 |
| Amlodipine Besylate | 461 | 177 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 391 | 118 |
| Lisinopril | 338 | 134 |
| Levothyroxine Sodium | 278 | 106 |
| Losartan Potassium | 264 | 109 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-12-04
- Last updated
- 2021-11-30
- Certified
- 2021-11-30
Frequently asked questions
- What is Tsung Tsai's NPI number?
- Tsung Tsai's National Provider Identifier (NPI) is 1629250394, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tsung Tsai's specialty?
- Tsung Tsai is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Tsung Tsai located?
- Tsung Tsai's practice location on file with NPPES is 2295 S Vineyard Ave, Ontario, CA 91761-7925.
- What is Tsung Tsai's phone number?
- The practice phone number listed in the NPPES registry for Tsung Tsai is (888) 750-0036.
- Does Tsung Tsai accept Medicare?
- Tsung Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tsung Tsai's NPI active?
- Yes — Tsung Tsai's NPI (1629250394) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.