DR. ARIEL CHAIREZ M.D.
NPI 1285860106
Pediatrics - Pediatric Critical Care Medicine in Madera, CA
About Dr. Ariel Chairez M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ARIEL CHAIREZ M.D. (NPI 1285860106) is an individual pediatric critical care medicine provider in Madera, California, licensed in California (A137276) and active in the NPI registry since June 2009. He 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)
Dr. Ariel Chairez M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Ariel Chairez reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Madera, CA 93636
- Reassigned Medicare billing, California enrollment
- 55 clinicians in this Medicare group
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
- 1,281 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.
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.
MADERA, CA 93636
MADERA, CA 93636
MADERA, CA 93636
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 Ariel Chairez's NPI number?
The NPI number for Ariel Chairez is 1285860106. It was assigned to this individual provider in the NPPES registry on June 5, 2009.
Where is Ariel Chairez located?
Ariel Chairez practices at 9300 Valley Childrens Pl, Madera, CA 93636. The listed phone number is (559) 353-3000.
What is Ariel Chairez's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.
Is Ariel Chairez enrolled in Medicare?
Yes. Ariel Chairez is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ariel Chairez's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ariel Chairez reassigns Medicare benefits to 2 organizations: Pediatric Anesthesia Associates Medical Group Inc (Madera, CA) and Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, CA). 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 Ariel Chairez'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 Ariel Chairez was last updated on July 21, 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.
# Dr. Ariel Chairez, M.D. · NPI 1285860106
Pediatric Critical Care Medicine physician in Madera, California. Individual provider, active in the CMS NPPES registry since June 5, 2009.
## Identity
- **NPI:** 1285860106 (Entity type: Individual)
- **Enumerated:** June 5, 2009
- **Primary specialty:** Pediatrics - Pediatric Critical Care Medicine · taxonomy 2080P0203X
- **State license:** A137276 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9300 VALLEY CHILDRENS PL, Madera, CA 93636-8761
- **Phone:** (559) 353-3000
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Pediatric Anesthesia Associates Medical Group Inc (NPI 1558588871, Madera, CA); Children's Hospital Los Angeles Medical Group, Inc. (NPI 1265530653, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 21, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1285860106) · Data from the CMS NPPES public registry.