NATHAN ALYESH MD INC
NPI 1821500380
General Acute Care Hospital in Tarzana, CA
About Nathan Alyesh Md Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHAN ALYESH MD INC (NPI 1821500380) is a healthcare organization registered as a general acute care hospital in Tarzana, California and active in the NPI registry since October 2017. The organization lists Nathan Alyesh, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Nathan Alyesh Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Nathan Alyesh MD Inc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Nathan Alyesh MD Inc's NPI number?
The NPI number for Nathan Alyesh MD Inc is 1821500380. It was assigned to this organization in the NPPES registry on October 24, 2017.
Where is Nathan Alyesh MD Inc located?
Nathan Alyesh MD Inc is located at 18321 Clark St, Tarzana, CA 91356. The listed phone number is (818) 881-0800.
What is Nathan Alyesh MD Inc's specialty?
The primary specialty registered for this NPI is General Acute Care Hospital with taxonomy code 282N00000X.
Is Nathan Alyesh MD Inc enrolled in Medicare?
Yes. Nathan Alyesh MD Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Nathan Alyesh MD Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Nathan Alyesh MD Inc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Nathan Alyesh MD Inc was last updated on May 16, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Nathan Alyesh Md Inc · NPI 1821500380
General Acute Care Hospital organization in Tarzana, California. Organization record, active in the CMS NPPES registry since October 24, 2017.
## Identity
- **NPI:** 1821500380 (Entity type: Organization)
- **Enumerated:** October 24, 2017
- **Primary specialty:** General Acute Care Hospital · taxonomy 282N00000X
- **Organization subpart:** No
- **Authorized official:** Nathan Alyesh, PRESIDENT
## Practice location
- **Address:** 18321 CLARK ST, Tarzana, CA 91356-3501
- **Phone:** (818) 881-0800
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 16, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1821500380) · Data from the CMS NPPES public registry.