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ANDREA LEE YAO M.D.
NPI 1740354059
Internal Medicine - Nephrology in Hayward, CA

Active since November 20, 2006PECOS Enrolled
27303 SLEEPY HOLLOW AVE S, HAYWARD, CA 94545(510) 454-1000 Get Directions Write a Review

NPPES record last updated: December 6, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Andrea Lee Yao M.d. NPPES

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

ANDREA LEE YAO M.D. (NPI 1740354059) is an individual nephrology provider in Hayward, California, licensed in California (A76246) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1740354059
Entity TypeIndividualFemale
Primary Taxonomy207RN0300X
Provider Legal NameANDREA LEE YAOCredential: M.D.
Location Address27303 SLEEPY HOLLOW AVE SHayward, CA 94545-4203
Mailing Address27303 Sleepy Hollow Ave SHayward, CA 94545-4203 · (510) 454-1000
Phone(510) 454-1000
Sole ProprietorNo
Enumeration DateNovember 20, 2006
Last NPPES UpdateDecember 6, 2021
✔ NPI 1740354059 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · A76246
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
27303 SLEEPY HOLLOW AVE S, Hayward, CA 94545
Open in Google Maps ↗

Other Identifiers 1

Medicaid00A762460CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Andrea Lee Yao M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Andrea Yao reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
12 mi
Internal Medicine
1190 VETERANS BLVD
Redwood City, CA 94063
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1639252604 (650) 299-2000

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 94545 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

GEORGE LAI M.D.
Internal Medicine (Nephrology)
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
ELAINE K ONG M.D.
Pediatrics
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
DAYNA TAI
Pharmacist
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 784-4589
RANGASHREE VARADARAJAN MD
Internal Medicine (Nephrology)
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 784-2769
ARMANDO LASARO PLATA M.D.
Urology
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
LUCY OANH PHUONG M.D.
Pediatrics
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
NATALIE CAC
Allergy & Immunology
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 784-6225
OLGA LEMBERG MD
Pediatrics
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 752-1000

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 Andrea Yao's NPI number?

The NPI number for Andrea Yao is 1740354059. It was assigned to this individual provider in the NPPES registry on November 20, 2006.

Where is Andrea Yao located?

Andrea Yao practices at 27303 Sleepy Hollow Ave S, Hayward, CA 94545. The listed phone number is (510) 454-1000.

What is Andrea Yao's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Andrea Yao enrolled in Medicare?

Yes. Andrea Yao is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Andrea Yao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrea Yao reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, 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 Andrea Yao'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 Andrea Yao was last updated on December 6, 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.