Pei Tsau, MD
NPI 1235203910 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Cardiac Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Pei Tsau, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Palo Alto, CA (NPI 1235203910).
Provider details
- NPI number
- 1235203910
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 29184 (AZ)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
294 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 143 | $262 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 47 | $217 |
| Replacement of Aortic Valve Through the Skin and Femoral Artery33361 | 36 | $780 |
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 | 24 | $1,821 |
| Harvest of Vein Using an Endoscope33508 | 20 | $16 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$597 across 12 records (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
Additional practice locations (2)
- 2490 Hospital Dr Ste 109Mountain View, CA 94040-4125Phone: (650) 404-8250
- 2900 Whipple AveSuite 225Redwood City, CA 94062-2843Phone: (650) 366-0225
Registry dates
- Enumerated
- 2006-11-17
- Last updated
- 2020-05-28
- Certified
- 2020-05-28
Frequently asked questions
- What is Pei Tsau's NPI number?
- Pei Tsau's National Provider Identifier (NPI) is 1235203910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Pei Tsau's specialty?
- Pei Tsau is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Pei Tsau located?
- Pei Tsau's practice location on file with NPPES is 87 Encina Ave, Palo Alto, CA 94301-2322.
- What is Pei Tsau's phone number?
- The practice phone number listed in the NPPES registry for Pei Tsau is (650) 853-5745.
- Does Pei Tsau accept Medicare?
- Pei Tsau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Pei Tsau's NPI active?
- Yes — Pei Tsau's NPI (1235203910) is active in the NPPES registry as of the last update on 2020-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.