Doctor profile · Federal record
Dr. Diana Tsai, MD
Hospitalist Physician (CMS: Hospitalist) · Family Medicine Physician · Internal Medicine Physician · Mountain View, CA
- NPI 1669534467
- Accepts Medicare
- 27 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
701 E El Camino Real
Mountain View, CA 940402833
(650) 934-7808 - Mailing address
-
325 Distel Cir
Los Altos, CA 940221408
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- February 25, 2021
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 208M00000X — NUCC code
- State license (1)
- California #A72927
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669534467. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
463
Distinct HCPCS
5
Medicare allowed
$54,352
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 273 | 117 | $91 | |
99239 |
Hospital discharge day management, more than 30 minutes | 74 | 73 | $134 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 52 | 51 | $200 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 33 | 33 | $149 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 31 | 23 | $137 |
In context: peer comparison
Among 19 peers in this city , average services per provider: 136. This provider delivers 3.4× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Diana Tsai's medical specialty?
Dr. Diana Tsai practices Hospitalist Physician in Mountain View, CA.
Where does Dr. Diana Tsai practice?
Dr. Diana Tsai practices at 701 E El Camino Real, Mountain View, CA 940402833. Office phone: 6509347808.
What is Dr. Diana Tsai's NPI?
Dr. Diana Tsai's National Provider Identifier (NPI) is 1669534467, issued by NPPES.
Does Dr. Diana Tsai accept Medicare assignment?
Yes. Dr. Diana Tsai accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Diana Tsai commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.