WILLA JOLIE CHEN MD, MPH
NPI 1497496244
Family Medicine in Oakland, CA
About Willa Jolie Chen Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLA JOLIE CHEN MD, MPH (NPI 1497496244) is an individual family medicine provider in Oakland, California, licensed in California (A189668) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Jose, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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
Willa Jolie Chen Md, Mph 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 Reassignment
Medicare enrollment records show Willa Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 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 94609 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Willa Chen's NPI number?
The NPI number for Willa Chen is 1497496244. It was assigned to this individual provider in the NPPES registry on April 5, 2022.
Where is Willa Chen located?
Willa Chen practices at 350 Hawthorne Ave Rm 2316, Oakland, CA 94609. The listed phone number is (510) 869-6883.
What is Willa Chen's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Willa Chen enrolled in Medicare?
Yes. Willa Chen 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 Willa Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Willa Chen reassigns Medicare benefits to Sutter Bay Medical Foundation (Orinda, 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 Willa Chen'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 Willa Chen was last updated on September 18, 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.
# Willa Jolie Chen, MD, MPH · NPI 1497496244
Family Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since April 5, 2022.
## Identity
- **NPI:** 1497496244 (Entity type: Individual)
- **Enumerated:** April 5, 2022
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A189668 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 350 HAWTHORNE AVE RM 2316, Oakland, CA 94609-3108
- **Phone:** (510) 869-6883 · **Fax:** (510) 869-6888
## 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:** Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** September 18, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1497496244) · Data from the CMS NPPES public registry.