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RUTH CHIANG KAO M.D.
NPI 1821383464
Pediatrics in Orange, CA

Active since June 11, 2011PECOS Enrolled
505 S MAIN ST, SUITE 525, ORANGE, CA 92868(714) 456-5631(714) 285-0389 Get Directions Write a Review

NPPES record last updated: January 10, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ruth Chiang Kao M.d. NPPES

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

RUTH CHIANG KAO M.D. (NPI 1821383464) is an individual pediatrics provider in Orange, California, licensed in California (A124362) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821383464
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameRUTH CHIANG KAOCredential: M.D.
Location Address505 S MAIN ST, SUITE 525Orange, CA 92868-4509
Mailing Address505 S Main St, Suite 525Orange, CA 92868-4509 · (714) 456-5631 · Fax (714) 285-0389
Phone(714) 456-5631
Fax(714) 285-0389
Sole ProprietorNo
Enumeration DateJune 11, 2011
Last NPPES UpdateJanuary 10, 2022
✔ NPI 1821383464 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A124362
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
505 S MAIN ST, Orange, CA 92868
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Other Names 1

Other Name (5)Ruth Chiang M.d.

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ruth Chiang Kao 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 Reassignment

Medicare enrollment records show Ruth Chiang Kao reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
338 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000

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 92868 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 20

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

DR. RYAN MICHAEL SMITH M.D.
Pediatrics
505 S MAIN ST
ORANGE, CA 92868
Orange County (714) 456-5631
MICHAEL ROSS RN
Case Manager/Care Coordinator
505 S MAIN ST
ORANGE, CA 92868
Orange County (907) 299-1410
KIMBERLY PETERSON NP
Nurse Practitioner (Pediatrics)
505 S MAIN ST
ORANGE, CA 92868
Orange County (714) 509-3939
DR. SUSAN WONG M.D.
Student in an Organized Health Care Education/Training Program
505 S MAIN ST, SUITE 525
ORANGE, CA 92868
Orange County (714) 456-5631
GALANT AND LIN MD'S INC.
Allergy & Immunology
505 S MAIN ST, STE 250
ORANGE, CA 92868
Orange County (714) 771-7994
DR. JORDAN FISHER M.D.
Pediatrics
505 S MAIN ST, SUITE 1200
ORANGE, CA 92868
Orange County (714) 509-8826
AHMED ABDELHALIM ABDELAZIZ ALI M.D.
Urology (Pediatric Urology)
505 S MAIN ST, SUITE 100
ORANGE, CA 92868
Orange County (714) 509-3914
MAYURIKA BANERJEE BARTENSTEIN
Student in an Organized Health Care Education/Training Program
505 S MAIN ST, SUITE 525
ORANGE, CA 92868
Orange County (714) 456-5631

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 Ruth Chiang Kao's NPI number?

The NPI number for Ruth Chiang Kao is 1821383464. It was assigned to this individual provider in the NPPES registry on June 11, 2011. The provider is also known as Ruth Chiang M.D..

Where is Ruth Chiang Kao located?

Ruth Chiang Kao practices at 505 S Main St Suite 525, Orange, CA 92868. The listed phone number is (714) 456-5631.

What is Ruth Chiang Kao's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Ruth Chiang Kao enrolled in Medicare?

Yes. Ruth Chiang Kao is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Ruth Chiang Kao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ruth Chiang Kao reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, 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 Ruth Chiang Kao'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 Ruth Chiang Kao was last updated on January 10, 2022. 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.