ARI KASSARDJIAN MD
NPI 1689200115
Radiology - Radiation Oncology in Simi Valley, CA
About Ari Kassardjian Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARI KASSARDJIAN MD (NPI 1689200115) is an individual radiation oncology provider in Simi Valley, California, licensed in California (A182051) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and is a graduate of University Of Southern California Keck School Of Medicine (2021).
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)
Ari Kassardjian Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ari Kassardjian reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Simi Valley, CA 93065
- Reassigned Medicare billing, California enrollment
- 139 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 93065 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SIMI VALLEY, CA 93065
SIMI VALLEY, CA 93065
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 Ari Kassardjian's NPI number?
The NPI number for Ari Kassardjian is 1689200115. It was assigned to this individual provider in the NPPES registry on March 16, 2020.
Where is Ari Kassardjian located?
Ari Kassardjian practices at 2985 Sycamore Dr, Simi Valley, CA 93065. The listed phone number is (805) 955-6000.
What is Ari Kassardjian's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Ari Kassardjian enrolled in Medicare?
Yes. Ari Kassardjian is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ari Kassardjian's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ari Kassardjian reassigns Medicare benefits to Adventist Health Physicians Network (Simi Valley, 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 Ari Kassardjian'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 Ari Kassardjian was last updated on June 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Ari Kassardjian, MD · NPI 1689200115
Radiation Oncology physician in Simi Valley, California. Individual provider, active in the CMS NPPES registry since March 16, 2020.
## Identity
- **NPI:** 1689200115 (Entity type: Individual)
- **Enumerated:** March 16, 2020
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** A182051 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2985 SYCAMORE DR, Simi Valley, CA 93065-1201
- **Phone:** (805) 955-6000
## 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:** Adventist Health Physicians Network (NPI 1720831720, Simi Valley, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2021
## Record status
- **NPPES last updated:** June 19, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1689200115) · Data from the CMS NPPES public registry.