NADINE SIDHOM
NPI 1275089583
Psychologist in Orange, CA
About Nadine Sidhom NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NADINE SIDHOM (NPI 1275089583) is an individual psychologist in Orange, California, licensed in (33615) and active in the NPI registry since August 2016. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Nadine Sidhom is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Nadine Sidhom 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
- 44 clinicians in this Medicare group
Carlsbad, CA 92008
- Reassigned Medicare billing, California enrollment
- 223 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 Nadine Sidhom's NPI number?
The NPI number for Nadine Sidhom is 1275089583. It was assigned to this individual provider in the NPPES registry on August 27, 2016.
Where is Nadine Sidhom located?
Nadine Sidhom practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-7890.
What is Nadine Sidhom's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Nadine Sidhom enrolled in Medicare?
Yes. Nadine Sidhom is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Nadine Sidhom's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nadine Sidhom reassigns Medicare benefits to 2 organizations: The Department Of Psychiatry (Orange, CA) and Memory Check Psychological Services, A Professional Corporation (Carlsbad, 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 Nadine Sidhom'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 Nadine Sidhom was last updated on September 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.