DR. ALEXANDRA MAZO MD
NPI 1194202283
Pediatrics - Pediatric Nephrology in San Bernardino, CA
About Dr. Alexandra Mazo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEXANDRA MAZO MD (NPI 1194202283) is an individual pediatric nephrology provider in San Bernardino, California, licensed in California (A206585) and active in the NPI registry since July 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2006).
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 and accepts Medicare assignment
Dr. Alexandra Mazo Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Alexandra Mazo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Bernardino, CA 92408
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
Hawthorne, NY 10532
- Reassigned Medicare billing, New York enrollment
- 511 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN BERNARDINO, CA 92408
SAN BERNARDINO, CA 92408
SAN BERNARDINO, CA 92408
SAN BERNARDINO, CA 92408
SAN BERNARDINO, CA 92408
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 Alexandra Mazo's NPI number?
The NPI number for Alexandra Mazo is 1194202283. It was assigned to this individual provider in the NPPES registry on July 23, 2018.
Where is Alexandra Mazo located?
Alexandra Mazo practices at 250 E Caroline St Ste J, San Bernardino, CA 92408. The listed phone number is (909) 651-1904.
What is Alexandra Mazo's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Nephrology, with taxonomy code 2080P0210X.
Is Alexandra Mazo enrolled in Medicare?
Yes. Alexandra Mazo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Alexandra Mazo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Mazo reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (San Bernardino, CA) and Boston Children's Health Physicians, LLP (Hawthorne, NY). 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 Alexandra Mazo'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 Alexandra Mazo was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 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.
# Dr. Alexandra Mazo, MD · NPI 1194202283
Pediatric Nephrology physician in San Bernardino, California. Individual provider, active in the CMS NPPES registry since July 23, 2018.
## Identity
- **NPI:** 1194202283 (Entity type: Individual)
- **Enumerated:** July 23, 2018
- **Primary specialty:** Pediatrics - Pediatric Nephrology · taxonomy 2080P0210X
- **State license:** A206585 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 250 E CAROLINE ST STE J, San Bernardino, CA 92408-3758
- **Phone:** (909) 651-1904
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **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): Faculty Physicians And Surgeons Of Llusm (NPI 1386162949, San Bernardino, CA); Boston Children's Health Physicians, LLP (NPI 1467454967, Hawthorne, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** September 22, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1194202283) · Data from the CMS NPPES public registry.