Jonathan Tsai
NPI 1497252522 · Hospitalist Physician · San Leandro, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Tsai is a Hospitalist Physician provider in San Leandro, CA (NPI 1497252522).
Provider details
- NPI number
- 1497252522
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 180276 (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
8 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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Monohydrate | 20 | 20 |
| Prednisone | 20 | 20 |
| Furosemide | 18 | 12 |
| Oxycodone Hcl | 18 | 16 |
| Cefpodoxime Proxetil | 15 | 15 |
| Pantoprazole Sodium | 12 | — |
| Amlodipine Besylate | 11 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-04-06
- Last updated
- 2023-08-21
- Certified
- 2023-08-21
Frequently asked questions
- What is Jonathan Tsai's NPI number?
- Jonathan Tsai's National Provider Identifier (NPI) is 1497252522, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Tsai's specialty?
- Jonathan Tsai is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Tsai located?
- Jonathan Tsai's practice location on file with NPPES is 2500 Merced St, San Leandro, CA 94577-4201.
- What is Jonathan Tsai's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Tsai is (510) 514-2872.
- Does Jonathan Tsai accept Medicare?
- Jonathan Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Tsai's NPI active?
- Yes — Jonathan Tsai's NPI (1497252522) is active in the NPPES registry as of the last update on 2023-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.