MARY LE CHIOU MD
NPI 1124461231
Pediatrics in Menlo Park, CA
About Mary Le Chiou Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY LE CHIOU MD (NPI 1124461231) is an individual pediatrics provider in Menlo Park, California, licensed in California (A131841) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mary Le Chiou Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
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.
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
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 94025 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
MENLO PARK, CA 94025
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 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.
Where is Mary Chiou located?
Mary Chiou practices at 1300 Crane St, Menlo Park, CA 94025. The listed phone number is (650) 498-7489.
What is Mary Chiou's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Mary Chiou enrolled in Medicare?
Yes. Mary Chiou is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Chiou's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Chiou reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, 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 Mary Chiou'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 Mary Chiou was last updated on November 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days 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.
# Mary Le Chiou, MD · NPI 1124461231
Pediatrics physician in Menlo Park, California. Individual provider, active in the CMS NPPES registry since April 9, 2013.
## Identity
- **NPI:** 1124461231 (Entity type: Individual)
- **Enumerated:** April 9, 2013
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A131841 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1300 CRANE ST, Menlo Park, CA 94025-4260
- **Phone:** (650) 498-7489
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1639252604, Redwood City, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 3, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1124461231) · Data from the CMS NPPES public registry.