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DR. SIEW YEAN LAU MD
NPI 1245366632
Anesthesiology in Mountain View, CA

Active since February 27, 2007PECOS EnrolledAccepts Medicare Assignment
2135 LANDINGS DR, BUILDING S, MOUNTAIN VIEW, CA 94043(650) 903-9500(650) 903-9900 Get Directions Write a Review

NPPES record last updated: December 15, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Siew Yean Lau Md NPPES

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

DR. SIEW YEAN LAU MD (NPI 1245366632) is an individual anesthesiology provider in Mountain View, California, licensed in California (A103037) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2003).

NPPES Registry Identity

NPI1245366632
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameDR. SIEW YEAN LAUCredential: MD
Location Address2135 LANDINGS DR, BUILDING SMountain View, CA 94043-0837
Mailing Address2135 Landings Dr, Building SMountain View, CA 94043-0837 · (650) 903-9500 · Fax (650) 903-9900
Phone(650) 903-9500
Fax(650) 903-9900
Sole ProprietorNo
Medical School CMSOtherGraduated 2003
Enumeration DateFebruary 27, 2007
Last NPPES UpdateDecember 15, 2021
✔ NPI 1245366632 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A103037
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.
2135 LANDINGS DR, Mountain View, CA 94043
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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

Dr. Siew Yean Lau 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.

PECOS PAC ID8921169970
PECOS Enrollment IDI20090123000148
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 Siew Yean Lau reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
7.8 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000

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 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. CRISTINA CABRERA CUNANAN MD
Student in an Organized Health Care Education/Training Program
2135 LANDINGS DR, BUILDING S
MOUNTAIN VIEW, CA 94043
Santa Clara County (650) 903-9500
DR. RICHARD J BASS M.D.
Anesthesiology
2135 LANDINGS DR, BUILDING S
MOUNTAIN VIEW, CA 94043
Santa Clara County (650) 903-9500

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 Siew Yean Lau's NPI number?

The NPI number for Siew Yean Lau is 1245366632. It was assigned to this individual provider in the NPPES registry on February 27, 2007.

Where is Siew Yean Lau located?

Siew Yean Lau practices at 2135 Landings Dr Building S, Mountain View, CA 94043. The listed phone number is (650) 903-9500.

What is Siew Yean Lau's specialty?

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

Is Siew Yean Lau enrolled in Medicare?

Yes. Siew Yean Lau 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 Siew Yean Lau's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Siew Yean Lau reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, 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 Siew Yean Lau'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 Siew Yean Lau was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.