Thy Vo-Tsai, D.O.
NPI 1821359571 · Student in an Organized Health Care Education/Training Program · La Palma, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thy Vo-Tsai, D.O. is a Student in an Organized Health Care Education/Training Program provider in La Palma, CA (NPI 1821359571).
Provider details
- NPI number
- 1821359571
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 74 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 381 | 134 |
| Levothyroxine Sodium | 188 | 53 |
| Lisinopril | 184 | 60 |
| Losartan Potassium | 177 | 64 |
| Amlodipine Besylate | 137 | 49 |
| Rosuvastatin Calcium | 89 | 29 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-30
- Last updated
- 2021-12-06
- Certified
- 2021-12-06
Frequently asked questions
- What is Thy Vo-Tsai's NPI number?
- Thy Vo-Tsai's National Provider Identifier (NPI) is 1821359571, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thy Vo-Tsai's specialty?
- Thy Vo-Tsai is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Thy Vo-Tsai located?
- Thy Vo-Tsai's practice location on file with NPPES is 5 Centerpointe Dr, La Palma, CA 90623-1050.
- What is Thy Vo-Tsai's phone number?
- The practice phone number listed in the NPPES registry for Thy Vo-Tsai is (714) 562-3420.
- Does Thy Vo-Tsai accept Medicare?
- Thy Vo-Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thy Vo-Tsai's NPI active?
- Yes — Thy Vo-Tsai's NPI (1821359571) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.