DR. MARY LE CHIOU M.D.
NPI 1124461231
Pediatrics in Palo Alto, CA

Q: What is Mary Chiou's NPI number?

The NPI number for Mary Chiou is 1124461231. It was assigned to this individual provider in the NPPES registry on April 9, 2013.

Q: What is Mary Chiou's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Mary Chiou was last updated on December 16, 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.

Active since April 09, 2013PECOS Enrolled

725 WELCH RD, DEPARTMENT OF PEDIATRICS MAIL CODE 5906, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: December 16, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 16, 2021, Feb 18, 2016 (2 updates tracked since 2016).

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About Dr. Mary Le Chiou M.d. NPPES

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

DR. MARY LE CHIOU M.D. (NPI 1124461231) is an individual pediatrics provider in Palo Alto, California, licensed in California (A131841) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1124461231

Entity TypeIndividualFemale

Primary Taxonomy208000000X

Provider Legal NameDR. MARY LE CHIOUCredential: M.D.

Location Address725 WELCH RD, DEPARTMENT OF PEDIATRICS MAIL CODE 5906Palo Alto, CA 94304-1601

Mailing Address725 Welch Rd, Department Of Pediatrics Mail Code 5906Palo Alto, CA 94304-1601 · (650) 497-8000

Phone(650) 497-8000

Sole ProprietorNo

Enumeration DateApril 9, 2013

Last NPPES UpdateDecember 16, 20212 updates tracked since enumeration

✔ NPI 1124461231 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in CA · A131841

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.

725 WELCH RD, Palo Alto, CA 94304

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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. Mary Le Chiou 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 Mary Chiou reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc

4.5 mi

Internal Medicine

1190 VETERANS BLVD
Redwood City, CA 94063

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1639252604 (650) 299-2000

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 94304 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

$106.47 typical visit price

range $70.37 – $206.04

Typical copayment $26.61 (range $17.59 – $51.51)

Most-billed visit code 99203

Established Patient

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

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.

EIRI INENAGA MS, OTR/L

Occupational Therapist (Pediatrics)