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WILLA JOLIE CHEN MD, MPH
NPI 1497496244
Family Medicine in Oakland, CA

Active since April 05, 2022PECOS EnrolledAccepts Medicare Assignment
350 HAWTHORNE AVE RM 2316, OAKLAND, CA 94609(510) 869-6883(510) 869-6888 Get Directions Write a Review

NPPES record last updated: September 18, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Sep 18, 2025, Apr 5, 2022 (2 updates tracked since 2022).

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

NPI1497496244
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameWILLA JOLIE CHENCredential: MD, MPH
Location Address350 HAWTHORNE AVE RM 2316Oakland, CA 94609-3108
Mailing AddressPo Box 276950Sacramento, CA 95827-6950
Phone(510) 869-6883
Fax(510) 869-6888
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateApril 5, 2022
Last NPPES UpdateSeptember 18, 20252 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2025
✔ NPI 1497496244 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A189668
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedHospitalistTaxonomy 208M00000X · License A189668 (CA)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
350 HAWTHORNE AVE RM 2316, Oakland, CA 94609
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Secondary Practice Location 1

Location 1455 OConnor Dr Ste 250San Jose, CA 95128-1644 · Phone (408) 283-7767

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

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.

PECOS PAC ID8022512391
PECOS Enrollment IDI20250918003943
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.

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.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
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 2

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

MARTIN J GARCIA M.D.
Hospitalist
350 HAWTHORNE AVE RM 2316
OAKLAND, CA 94609
Alameda County (510) 869-6883
NAVEEN THOTA MD
Internal Medicine
350 HAWTHORNE AVE RM 2316
OAKLAND, CA 94609
Alameda County (510) 869-6886

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.

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 10 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.