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DR. HONG HANH T CHAU MD
NPI 1164590519
Obstetrics & Gynecology in Lansdowne, VA

Active since December 02, 2006PECOS Enrolled
19450 DEERFIELD AVE STE 300, LOUDOUN MEDICAL CENTER, LANSDOWNE, VA 20176(703) 726-2100(703) 726-4550 Get Directions Write a Review

NPPES record last updated: November 22, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Hong Hanh T Chau Md NPPES

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

DR. HONG HANH T CHAU MD (NPI 1164590519) is an individual obstetrics & gynecology provider in Lansdowne, Virginia, licensed in Virginia (0101055894) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1164590519
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. HONG HANH T CHAUCredential: MD
Location Address19450 DEERFIELD AVE STE 300, LOUDOUN MEDICAL CENTERLansdowne, VA 20176-6821
Mailing Address2101 East Jefferson Street, Ppqa Medicare Compliance Unit 6w Attn Theresa BrooksRockville, MD 20852-4908 · (301) 816-6660 · Fax (301) 816-6308
Phone(703) 726-2100
Fax(703) 726-4550
Sole ProprietorNo
Enumeration DateDecember 2, 2006
Last NPPES UpdateNovember 22, 2021
NPPES CertifiedNovember 22, 2021
✔ NPI 1164590519 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in VA · 0101055894
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
19450 DEERFIELD AVE STE 300, Lansdowne, VA 20176
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Hong Hanh T Chau Md 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 Hong Hanh Chau reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc
Same address
Health Maintenance Organization
19450 DEERFIELD AVE
Lansdowne, VA 20176
  • Reassigned Medicare billing, Virginia enrollment
  • 995 clinicians in this Medicare group
NPI 1225156367 (703) 726-2100

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 20176 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
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$70.08 typical visit price
range $18.07 – $138.91
Typical copayment $17.52 (range $4.51 – $34.72)
Most-billed visit code 99213
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

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

DR. ALI MOSHIRFAR M.D.
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
19450 DEERFIELD AVE STE 300
LEESBURG, VA 20176
Loudoun County (703) 723-6774

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 Hong Hanh Chau's NPI number?

The NPI number for Hong Hanh Chau is 1164590519. It was assigned to this individual provider in the NPPES registry on December 2, 2006.

Where is Hong Hanh Chau located?

Hong Hanh Chau practices at 19450 Deerfield Ave Ste 300 Loudoun Medical Center, Lansdowne, VA 20176. The listed phone number is (703) 726-2100.

What is Hong Hanh Chau's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Hong Hanh Chau enrolled in Medicare?

Yes. Hong Hanh Chau is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hong Hanh Chau's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hong Hanh Chau reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc (Lansdowne, VA). 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 Hong Hanh 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 Hong Hanh Chau was last updated on November 22, 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.