MITCHELL HAVEN KATZ MD
NPI 1366530107
Pediatrics - Pediatric Gastroenterology in Orange, CA
About Mitchell Haven Katz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MITCHELL HAVEN KATZ MD (NPI 1366530107) is an individual pediatric gastroenterology provider in Orange, California, licensed in California (G46842) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mitchell Haven Katz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mitchell Katz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92868 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.
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 Mitchell Katz's NPI number?
The NPI number for Mitchell Katz is 1366530107. It was assigned to this individual provider in the NPPES registry on October 10, 2006.
Where is Mitchell Katz located?
Mitchell Katz practices at 455 S Main St, Orange, CA 92868. The listed phone number is (714) 289-4099.
What is Mitchell Katz's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.
Is Mitchell Katz enrolled in Medicare?
Yes. Mitchell Katz is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mitchell Katz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mitchell Katz reassigns Medicare benefits to Children's Hospital Of Orange County (Orange, 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 Mitchell 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 Mitchell Katz was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Mitchell Haven Katz, MD · NPI 1366530107
Pediatric Gastroenterology physician in Orange, California. Individual provider, active in the CMS NPPES registry since October 10, 2006.
## Identity
- **NPI:** 1366530107 (Entity type: Individual)
- **Enumerated:** October 10, 2006
- **Primary specialty:** Pediatrics - Pediatric Gastroenterology · taxonomy 2080P0206X
- **State license:** G46842 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 455 S MAIN ST, Orange, CA 92868-3835
- **Phone:** (714) 289-4099 · **Fax:** (714) 516-4299
## 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:** Children's Hospital Of Orange County (NPI 1275975104, Orange, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN G22157 (CA); Medicaid 00G468420 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1366530107) · Data from the CMS NPPES public registry.