LILLIAN LEE TSAI MD
NPI 1225490519
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Stanford, CA
About Lillian Lee Tsai Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LILLIAN LEE TSAI MD (NPI 1225490519) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Stanford, California, licensed in California (A181925) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and is a graduate of Emory University School Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Lillian Lee Tsai Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Lillian Tsai reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Palo Alto, CA 94306
- Reassigned Medicare billing, California enrollment
- 2,460 clinicians in this Medicare group
Belmont, CA 94002
- Reassigned Medicare billing, California enrollment
- 1,191 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Lillian Tsai's NPI number?
The NPI number for Lillian Tsai is 1225490519. It was assigned to this individual provider in the NPPES registry on March 24, 2016.
Where is Lillian Tsai located?
Lillian Tsai practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Lillian Tsai's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Lillian Tsai enrolled in Medicare?
Yes. Lillian Tsai is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Lillian Tsai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lillian Tsai reassigns Medicare benefits to 4 organizations: Stanford Health Care (Stanford, CA), Lpch Medical Group Div Of Lucile (Palo Alto, CA), County Of Santa Clara (Palo Alto, CA) and Dignity Health Medical Foundation (Belmont, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lillian Tsai's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Lillian Tsai was last updated on October 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Lillian Lee Tsai, MD · NPI 1225490519
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Stanford, California. Individual provider, active in the CMS NPPES registry since March 24, 2016.
## Identity
- **NPI:** 1225490519 (Entity type: Individual)
- **Enumerated:** March 24, 2016
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** A181925 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Stanford Health Care (NPI 1437292927, Stanford, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); County Of Santa Clara (NPI 1144330614, Palo Alto, CA); Dignity Health Medical Foundation (NPI 1174531859, Belmont, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Emory University School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** October 2, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1225490519) · Data from the CMS NPPES public registry.