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DR. DUONGTHUY CHAU MD, DC
NPI 1154660710
Family Medicine in Garden Grove, CA

Active since February 01, 2013PECOS EnrolledAccepts Medicare Assignment
12942 HARBOR BLVD, GARDEN GROVE, CA 92840(714) 705-2120(714) 705-8139 Get Directions Write a Review

NPPES record last updated: October 2, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 5, 2025, Jul 11, 2024, Feb 9, 2023 and 4 more (7 updates tracked since 2017).

About Dr. Duongthuy Chau Md, Dc NPPES

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

DR. DUONGTHUY CHAU MD, DC (NPI 1154660710) is an individual family medicine provider in Garden Grove, California, licensed in California (A197431) and active in the NPI registry since February 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in West Covina, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1154660710
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. DUONGTHUY CHAUCredential: MD, DC
Location Address12942 HARBOR BLVDGarden Grove, CA 92840-5809
Mailing Address12942 Harbor BlvdGarden Grove, CA 92840-5809 · (714) 705-2120 · Fax (714) 705-8139
Phone(714) 705-2120
Fax(714) 705-8139
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateFebruary 1, 2013
Last NPPES UpdateOctober 2, 20257 updates tracked since enumeration
NPPES CertifiedOctober 2, 2025
✔ NPI 1154660710 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A197431
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 ListedChiropractorTaxonomy 111N00000X · License 32458 (CA)
12942 HARBOR BLVD, Garden Grove, CA 92840
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Other Names 1

Professional Name (2)Nancy-duong Chau Md,dc

Secondary Practice Location 1

Location 11135 Sunset Ave, Suite 401West Covina, CA 91790 · Phone (626) 732-8390 · Fax (714) 962-6432

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. Duongthuy Chau Md, Dc 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 ID749426112
PECOS Enrollment IDI20250919001919
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 Reassignments

2

Medicare enrollment records show Duongthuy Chau reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Medical Foundation
3.2 mi
Hematology & Oncology
1010 W LA VETA AVE STE 200
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 1,699 clinicians in this Medicare group
NPI 1801443510 (714) 835-1800
Emanate Health Medical Care Foundation
20 mi
Multi-Specialty
1135 S SUNSET AVE STE 401
West Covina, CA 91790
  • Reassigned Medicare billing, California enrollment
  • 114 clinicians in this Medicare group
NPI 1467195073 (626) 732-0394

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 92840 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 6

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

PARVEEN VORA MD
Family Medicine
12942 HARBOR BLVD
GARDEN GROVE, CA 92840
Orange County (714) 705-2120
MICHAEL A MALOUF M.D.
Family Medicine
12942 HARBOR BLVD
GARDEN GROVE, CA 92840
Orange County (714) 705-2120
MARTIN JOSEPH WALTSAK PA-C
Physician Assistant
12942 HARBOR BLVD
GARDEN GROVE, CA 92840
Orange County (714) 705-2120
JOSEPH TUAN NGUYEN D.O.
Family Medicine
12942 HARBOR BLVD
GARDEN GROVE, CA 92840
Orange County (714) 618-9540
MICHAEL ERIK HERNANDEZ DO
Family Medicine
12942 HARBOR BLVD
GARDEN GROVE, CA 92840
Orange County (714) 705-2120
HIEN THUY NGUYEN DO
Family Medicine
12942 HARBOR BLVD
GARDEN GROVE, CA 92840
Orange County (714) 705-2120

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 Duongthuy Chau's NPI number?

The NPI number for Duongthuy Chau is 1154660710. It was assigned to this individual provider in the NPPES registry on February 1, 2013. The provider is also known as Nancy-Duong Chau Md,dc.

Where is Duongthuy Chau located?

Duongthuy Chau practices at 12942 Harbor Blvd, Garden Grove, CA 92840. The listed phone number is (714) 705-2120.

What is Duongthuy Chau's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Duongthuy Chau enrolled in Medicare?

Yes. Duongthuy Chau 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 Duongthuy Chau's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Duongthuy Chau reassigns Medicare benefits to 2 organizations: Providence Medical Foundation (Orange, CA) and Emanate Health Medical Care Foundation (West Covina, CA). 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 Duongthuy Chau'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 Duongthuy Chau was last updated on October 2, 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.