Arnold Tsai, M.D.
NPI 1043522154 · Hospitalist Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arnold Tsai, M.D. is a Hospitalist Physician provider in Los Angeles, CA (NPI 1043522154).
Provider details
- NPI number
- 1043522154
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A116863 (CA)
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 tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hcl | 31 | 11 |
| Lisinopril | 29 | 13 |
| Atorvastatin Calcium | 25 | 15 |
| Empagliflozinbrand: Jardiance | 22 | — |
| Lacosamide | 21 | — |
| Amlodipine Besylate | 19 | 11 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-07-06
- Last updated
- 2023-11-27
- Certified
- 2020-09-08
Frequently asked questions
- What is Arnold Tsai's NPI number?
- Arnold Tsai's National Provider Identifier (NPI) is 1043522154, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arnold Tsai's specialty?
- Arnold Tsai is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Arnold Tsai located?
- Arnold Tsai's practice location on file with NPPES is 1500 San Pablo St, Los Angeles, CA 90033-5313.
- What is Arnold Tsai's phone number?
- The practice phone number listed in the NPPES registry for Arnold Tsai is (323) 442-5100.
- Does Arnold Tsai accept Medicare?
- Arnold Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arnold Tsai's NPI active?
- Yes — Arnold Tsai's NPI (1043522154) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.