WENDY WING NEI WOO MD
NPI 1497914006
Anesthesiology in Greenbrae, CA
About Wendy Wing Nei Woo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WENDY WING NEI WOO MD (NPI 1497914006) is an individual anesthesiology provider in Greenbrae, California, licensed in California (A110769) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses
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
Wendy Wing Nei Woo 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
6Medicare enrollment records show Wendy Woo reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Greenbrae, CA 94904
- Reassigned Medicare billing, California enrollment
- 36 clinicians in this Medicare group
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 723 clinicians in this Medicare group
Daly City, CA 94015
- Reassigned Medicare billing, California enrollment
- 53 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
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.
GREENBRAE, CA 94904
GREENBRAE, CA 94904
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 Wendy Woo's NPI number?
The NPI number for Wendy Woo is 1497914006. It was assigned to this individual provider in the NPPES registry on June 9, 2008.
Where is Wendy Woo located?
Wendy Woo practices at 250 Bon Air Rd, Greenbrae, CA 94904. The listed phone number is (415) 927-4070.
What is Wendy Woo's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Wendy Woo enrolled in Medicare?
Yes. Wendy Woo 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 Wendy Woo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Wendy Woo reassigns Medicare benefits to 6 organizations: Anesthesiology Consultants Of Marin (Greenbrae, CA), Permanente Medical Group Inc (Richmond, CA), Ucsf Medical Group Business Services (San Francisco, CA), University Of California San Francisco (San Francisco, CA), University Anesthesia Medical Group (San Francisco, CA) and 1 more organization, listed in the Medicare section above. 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 Wendy Woo'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 Wendy Woo was last updated on August 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Wendy Wing Nei Woo, MD · NPI 1497914006
Anesthesiology physician in Greenbrae, California. Individual provider, active in the CMS NPPES registry since June 9, 2008.
## Identity
- **NPI:** 1497914006 (Entity type: Individual)
- **Enumerated:** June 9, 2008
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A110769 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 250 BON AIR RD, Greenbrae, CA 94904-1702
- **Phone:** (415) 927-4070
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Anesthesiology Consultants Of Marin (NPI 1578580544, Greenbrae, CA); Permanente Medical Group Inc (NPI 1235226531, Richmond, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); University Of California San Francisco (NPI 1164512851, San Francisco, CA); University Anesthesia Medical Group (NPI 1528137296, San Francisco, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** August 26, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1497914006) · Data from the CMS NPPES public registry.