DR. ALEX KATZ M.D.
NPI 1124474655
Pediatrics - Pediatric Pulmonology in Orange, CA
About Dr. Alex Katz M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEX KATZ M.D. (NPI 1124474655) is an individual pediatric pulmonology provider in Orange, California, licensed in California (A150428) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, maintains a secondary practice location in Orange, and is a graduate of University Of Southern California Keck School Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses 4
Secondary Practice Location 1
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. Alex Katz M.d. 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 Alex Katz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 143 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Of Orange County
- 190 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.
ORANGE, CA 92868
ORANGE, CA 92868
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 Alex Katz's NPI number?
The NPI number for Alex Katz is 1124474655. It was assigned to this individual provider in the NPPES registry on May 13, 2016.
Where is Alex Katz located?
Alex Katz practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-7890.
What is Alex Katz's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Pulmonology, with taxonomy code 2080P0214X.
Is Alex Katz enrolled in Medicare?
Yes. Alex Katz 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 Alex Katz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alex Katz reassigns Medicare benefits to 2 organizations: Uc Regents Uci Dept Of Pediatrics (Orange, CA) and Children's Hospital Of Orange County (Orange, 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 Alex Katz'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 Alex Katz was last updated on June 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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. Alex Katz, M.D. · NPI 1124474655
Pediatric Pulmonology physician in Orange, California. Individual provider, active in the CMS NPPES registry since May 13, 2016.
## Identity
- **NPI:** 1124474655 (Entity type: Individual)
- **Enumerated:** May 13, 2016
- **Primary specialty:** Pediatrics - Pediatric Pulmonology · taxonomy 2080P0214X
- **State license:** A150428 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 101 THE CITY DR S, Orange, CA 92868-3201
- **Phone:** (714) 456-7890
## 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): Uc Regents Uci Dept Of Pediatrics (NPI 1235187311, Orange, CA); Children's Hospital Of Orange County (NPI 1275975104, Orange, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** June 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1124474655) · Data from the CMS NPPES public registry.