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DR. CATHERINE S CHAO M.D.
NPI 1184697443
Pediatrics - Pediatric Gastroenterology in Fairfax, VA

Active since February 08, 2006PECOS Enrolled
3700 JOSEPH SIEWICK DR, SUITE 308, FAIRFAX, VA 22033(703) 716-8700(703) 716-8703 Get Directions Write a Review

NPPES record last updated: March 15, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Catherine S Chao M.d. NPPES

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

DR. CATHERINE S CHAO M.D. (NPI 1184697443) is an individual pediatric gastroenterology provider in Fairfax, Virginia, licensed in Virginia (0101056644) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1184697443
Entity TypeIndividualFemale
Primary Taxonomy2080P0206X
Provider Legal NameDR. CATHERINE S CHAOCredential: M.D.
Location Address3700 JOSEPH SIEWICK DR, SUITE 308Fairfax, VA 22033-1744
Mailing Address3700 Joseph Siewick Dr, Suite 308Fairfax, VA 22033-1744 · (703) 716-8700 · Fax (703) 716-8703
Phone(703) 716-8700
Fax(703) 716-8703
Sole ProprietorNo
Enumeration DateFebruary 8, 2006
Last NPPES UpdateMarch 15, 2016
✔ NPI 1184697443 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0206X
License✔ Licensed in VA · 0101056644
Definition
A pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.
3700 JOSEPH SIEWICK DR, Fairfax, VA 22033
Open in Google Maps ↗

Other Identifiers 3

Medicare ID-Type Unspecified000761G74
Medicaid6724329VA
Medicare UPINF86041

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Catherine S Chao M.d. 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 Reassignments

2

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

Inova Health Care Services
7.8 mi
Multi-Specialty
2740 PROSPERITY AVE STE 200
Fairfax, VA 22031
  • Reassigned Medicare billing, District of Columbia enrollment
  • 2,618 clinicians in this Medicare group
NPI 1669511051 (703) 321-2600
Pediatric Specialists Of Virginia, LLC
7.9 mi
Pediatrics
3023 HAMAKER CT, SUITE 200
Fairfax, VA 22031
  • Reassigned Medicare billing, District of Columbia and Virginia enrollments
  • 128 clinicians in this Medicare group
NPI 1699119818 (703) 848-6627

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 2

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.

Study of esophagus to assess movement 91010
This procedure, known as esophageal manometry, involves studying the esophagus or food pipe to evaluate its movement and pressure. It helps understand how well the esophagus can move food to the stomach. Involving a thin, flexible tube, it's a safe, minimally invasive test.
13 services13 patients
Monitoring and recording of esophageal function through nasal tube with electrode 91037
This procedure involves placing a thin tube with an electrode through your nose and into your esophagus. It helps to monitor and record the function of your esophagus, aiding in diagnosing any potential issues.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22033 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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 20

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

DR. DAVID PAUL SIBLEY D.D.S.
Dentist (General Practice)
3700 JOSEPH SIEWICK DR, SUITE #307
FAIRFAX, VA 22033
Fairfax County (703) 715-9227
MS. KRISTIN DERMODY MAGGI PA-C
Physician Assistant (Medical)
3700 JOSEPH SIEWICK DR, SUITE 308
FAIRFAX, VA 22033
Fairfax County (703) 698-8960
WASEEM ISMAIL AZIZ MD
Internal Medicine (Gastroenterology)
3700 JOSEPH SIEWICK DR, SUITE 401
FAIRFAX, VA 22033
Fairfax County (703) 281-1023
JYOTHI GADDE MD PA
Specialist
3700 JOSEPH SIEWICK DR, STE 304
FAIRFAX, VA 22033
Fairfax County (703) 648-0015
GASTROINTESTINAL MEDICINE ASSOCIATES, PC
Clinic/Center (Medical Specialty)
3700 JOSEPH SIEWICK DR, SUITE 401
FAIRFAX, VA 22033
Fairfax County (703) 281-1023
DR. PETER L SCUDERA M.D.
Internal Medicine (Gastroenterology)
3700 JOSEPH SIEWICK DR, SUITE 308
FAIRFAX, VA 22033
Fairfax County (703) 698-8960
NOVA WOUND CARE, P.C.
Family Medicine
3700 JOSEPH SIEWICK DR, 303
FAIRFAX, VA 22033
Fairfax County (703) 664-8025
HERCHARAN KAUR SETHI M.D. P.C.
Obstetrics & Gynecology
3700 JOSEPH SIEWICK DR
FAIRFAX, VA 22033
Fairfax County (703) 476-5200

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 Catherine Chao's NPI number?

The NPI number for Catherine Chao is 1184697443. It was assigned to this individual provider in the NPPES registry on February 8, 2006.

Where is Catherine Chao located?

Catherine Chao practices at 3700 Joseph Siewick Dr Suite 308, Fairfax, VA 22033. The listed phone number is (703) 716-8700.

What is Catherine Chao's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Is Catherine Chao enrolled in Medicare?

Yes. Catherine Chao is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Catherine Chao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Chao reassigns Medicare benefits to 2 organizations: Inova Health Care Services (Fairfax, VA) and Pediatric Specialists Of Virginia, LLC (Fairfax, VA). 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 Catherine Chao's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Catherine Chao accept?

Health plans from Oscar Health list Catherine Chao as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Catherine Chao was last updated on March 15, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.