DR. ARI AHRON UCAR
NPI 1689203531
Internal Medicine in Los Angeles, CA
About Dr. Ari Ahron Ucar NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ARI AHRON UCAR (NPI 1689203531) is an individual internal medicine provider in Los Angeles, California, licensed in California (A185901) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2020).
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. Ari Ahron Ucar 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 Ari Ucar reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 198 clinicians in this Medicare group
Glendale, CA 91204
- Reassigned Medicare billing, California enrollment
- 49 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90059 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.
LOS ANGELES, CA 90059
LOS ANGELES, CA 90059
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 Ucar's NPI number?
The NPI number for Ari Ucar is 1689203531. It was assigned to this individual provider in the NPPES registry on April 3, 2020.
Where is Ari Ucar located?
Ari Ucar practices at 1680 E 120th St, Los Angeles, CA 90059. The listed phone number is (424) 338-8000.
What is Ari Ucar's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ari Ucar enrolled in Medicare?
Yes. Ari Ucar 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 Ari Ucar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ari Ucar reassigns Medicare benefits to 2 organizations: Superior Hospitalist Medical Group Inc (Los Angeles, CA) and Cedar Springs Hospitalist Medical Group, Inc. (Glendale, 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 Ari Ucar'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 Ucar was last updated on July 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. Ari Ahron Ucar · NPI 1689203531
Internal Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since April 3, 2020.
## Identity
- **NPI:** 1689203531 (Entity type: Individual)
- **Enumerated:** April 3, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A185901 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1680 E 120TH ST, Los Angeles, CA 90059-3026
- **Phone:** (424) 338-8000
## 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): Superior Hospitalist Medical Group Inc (NPI 1780047712, Los Angeles, CA); Cedar Springs Hospitalist Medical Group, Inc. (NPI 1245799279, Glendale, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** July 8, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1689203531) · Data from the CMS NPPES public registry.