Vivian Tsai, M.D.
NPI 1073781506 · Emergency Medicine Physician · Harbor City, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivian Tsai, M.D. is a Emergency Medicine Physician provider in Harbor City, CA (NPI 1073781506).
Provider details
- NPI number
- 1073781506
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 245930-1 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
146 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 | 50 | $138 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 22 | $122 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 21 | $179 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 16 | $95 |
| Detection Test By Immunoassay Technique for Severe Acute Respiratory Syndrome Coronavirus87426 | 15 | $35 |
| Manual Urinalysis Test With Examination Using Microscope, Automated81001 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 41 | 40 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 40 | 39 |
| Cephalexin | 37 | 37 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 26 | 25 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 26 | 26 |
| Azithromycin | 18 | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-02-19
- Last updated
- 2021-10-27
- Certified
- 2021-10-27
Frequently asked questions
- What is Vivian Tsai's NPI number?
- Vivian Tsai's National Provider Identifier (NPI) is 1073781506, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Tsai's specialty?
- Vivian Tsai is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Vivian Tsai located?
- Vivian Tsai's practice location on file with NPPES is 25825 Vermont Ave, Harbor City, CA 90710-3518.
- What is Vivian Tsai's phone number?
- The practice phone number listed in the NPPES registry for Vivian Tsai is (310) 325-5111.
- Does Vivian Tsai accept Medicare?
- Vivian Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivian Tsai's NPI active?
- Yes — Vivian Tsai's NPI (1073781506) is active in the NPPES registry as of the last update on 2021-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.