David Tsai, M.D.
NPI 1053683334 · Hospitalist Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Tsai, M.D. is a Hospitalist Physician provider in Mountain View, CA (NPI 1053683334).
Provider details
- NPI number
- 1053683334
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A120477 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
892 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 328 | $89 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 328 | $133 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 175 | $132 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 61 | $195 |
Typical Medicare-allowed amounts for these services range $89–$195 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 31 | 23 |
| Ciprofloxacin Hcl | 18 | 16 |
| Ondansetronbrand: Ondansetron Odt | 16 | 16 |
| Atorvastatin Calcium | 14 | — |
| Furosemide | 13 | — |
| Prednisone | 13 | 13 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-02-02
- Last updated
- 2021-02-25
- Certified
- 2021-02-25
Frequently asked questions
- What is David Tsai's NPI number?
- David Tsai's National Provider Identifier (NPI) is 1053683334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Tsai's specialty?
- David Tsai is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is David Tsai located?
- David Tsai's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is David Tsai's phone number?
- The practice phone number listed in the NPPES registry for David Tsai is (650) 934-7000.
- Does David Tsai accept Medicare?
- David Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Tsai's NPI active?
- Yes — David Tsai's NPI (1053683334) is active in the NPPES registry as of the last update on 2021-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.