Diana Tsai, MD
NPI 1669534467ActiveIndividual· Hospitalist· Mountain View, CA
Hospitalist (MD) in Mountain View, California, trained at Saint Louis University School of Medicine (class of 1999). 207 Medicare patients in 2024, $46,270 paid; nearly all of their 118 Part D prescriptions were generic (93%). Zoll Services LLC (A/K/A Zoll Lifecor Corp) reported $19.77 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1669534467 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 15, 2006 |
| Last updated in NPPES | Feb 25, 2021 |
| Certified by provider | Feb 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | A72927 | CA |
| Family Medicine | 207Q00000X | A72927 | CA |
| Internal Medicine | 207R00000X | A72927 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 207 |
|---|---|
| Services billed | 480 across 8 procedure codes |
| Paid by Medicare | $46,270 |
Part D prescriptions in 2024
| Prescriptions (claims) | 118 · 122 30-day fills |
|---|---|
| Patients | 66 |
| Total drug cost | $4,903 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Hospitalist |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliations
- El Camino HealthMountain View, CA
- Good Samaritan HospitalSan Jose, CA
Other facilities
- El Camino Hosp of Los GatosInpatient rehabilitation facility · Los Gatos, CA
Industry payments (Open Payments)
- 2025$19.77 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $19.77 | 1 |
What the 2025 payments were for
- Food and Beverage$19.77 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 37 hospitalists in Mountain View · All hospitalists in California