1. Home
  2. Directory
  3. California
  4. Stanford
  5. Anesthesiology
  6. NPI Profile

JOY TSAI
NPI 1275913055
Anesthesiology in Stanford, CA

Active since June 05, 2015PECOS EnrolledAccepts Medicare Assignment
300 PASTEUR DR, STANFORD, CA 94305(650) 723-6661 Get Directions Write a Review

NPPES record last updated: November 6, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 6, 2024, Mar 25, 2020 (2 updates tracked since 2020).

About Joy Tsai NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOY TSAI (NPI 1275913055) is an individual anesthesiology provider in Stanford, California, licensed in California (A195019) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, maintains a secondary practice location in Dallas, and is a graduate of University Of Texas Medical School At San Antonio (2024).

NPPES Registry Identity

NPI1275913055
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameJOY TSAI
Location Address300 PASTEUR DRStanford, CA 94305-2200
Mailing Address300 Pasteur Drive, Lane 154Stanford, CA 94305-5133 · (650) 723-6661 · Fax (650) 498-6205
Phone(650) 723-6661
Sole ProprietorNo
Medical School CMSUniversity Of Texas Medical School At San AntonioGraduated 2024
Enumeration DateJune 5, 2015
Last NPPES UpdateNovember 6, 20242 updates tracked since enumeration
NPPES CertifiedNovember 6, 2024
✔ NPI 1275913055 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A195019
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
300 PASTEUR DR, Stanford, CA 94305
Open in Google Maps ↗

Secondary Practice Location 1

Location 11935 Medical District DrDallas, TX 75235-7701 · Phone (214) 456-6019

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

Joy Tsai 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.

PECOS PAC ID9032424882
PECOS Enrollment IDI20240819003835
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Joy Tsai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Santa Clara
2.0 mi
Mental Health (Including Community Mental Health Center)
231 GRANT AVENUE
Palo Alto, CA 94306
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1588721500 (California), NPI 1629301346 (California)
  • 2,460 clinicians in this Medicare group
NPI 1144330614 (650) 321-5545

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

PRISTA CHARUWORN MD
Internal Medicine (Gastroenterology)
300 PASTEUR DR, ALWAY BUILD M211, MC 5187
STANFORD, CA 94305
Santa Clara County (650) 723-6661
ANDREW CHARLES PICEL M.D
Radiology (Vascular & Interventional Radiology)
300 PASTEUR DR
STANFORD, CA 94305
Santa Clara County (650) 723-4000
MATTHEW A WRIGHT M.D. PH.D.
Psychiatry & Neurology (Psychiatry)
300 PASTEUR DR
STANFORD, CA 94305
Santa Clara County (650) 723-4000
DR. QUAZI ZUBAIR AL-TARIQ M.D.
Radiology (Diagnostic Radiology)
300 PASTEUR DR
STANFORD, CA 94305
Santa Clara County (650) 723-4000
ANGIE DEE MURKINS NP
Nurse Practitioner
300 PASTEUR DR
STANFORD, CA 94305
Santa Clara County (650) 723-4000
DR. JAMSHID GHAJAR MD PHD
Neurological Surgery
300 PASTEUR DR
STANFORD, CA 94305
Santa Clara County (650) 723-4000
SARA BAKHTARY M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
300 PASTEUR DR, LANE 235
STANFORD, CA 94305
Santa Clara County (650) 723-5252
YU KUANG LAI MD
Internal Medicine (Critical Care Medicine)
300 PASTEUR DR
STANFORD, CA 94305
Santa Clara County (650) 723-4000

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 Joy Tsai's NPI number?

The NPI number for Joy Tsai is 1275913055. It was assigned to this individual provider in the NPPES registry on June 5, 2015.

Where is Joy Tsai located?

Joy Tsai practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-6661.

What is Joy Tsai's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Joy Tsai enrolled in Medicare?

Yes. Joy 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 organization bills Medicare for Joy Tsai's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joy Tsai reassigns Medicare benefits to County Of Santa Clara (Palo Alto, CA). The 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 Joy 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 Joy Tsai was last updated on November 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.