1. Home
  2. Directory
  3. California
  4. El Segundo
  5. Internal Medicine
  6. NPI Profile

CHAN SOON SHIONG INSTITUTE FOR MEDICINE
NPI 1215463799
Internal Medicine - Medical Oncology in El Segundo, CA

Active since May 03, 2017CLIA 05D2144811 · Accreditation
2040 E MARIPOSA AVE, EL SEGUNDO, CA 90245(213) 266-5600(562) 548-2304 Get Directions Write a Review

NPPES record last updated: October 20, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 20, 2023, Jan 19, 2023, May 24, 2020 and 3 more (6 updates tracked since 2018).

About Chan Soon Shiong Institute For Medicine NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHAN SOON SHIONG INSTITUTE FOR MEDICINE (NPI 1215463799) is a healthcare organization registered as a medical oncology in El Segundo, California and active in the NPI registry since May 2017. The organization holds an CLIA Accreditation certificate valid through July 2, 2028 and lists Leonard S Sender, President, as its authorized official.

NPPES Registry Identity

NPI1215463799
Entity TypeOrganization
Primary Taxonomy207RX0202X
Legal Business NameIMMUNO-ONCOLOGY CLINIC INC.
Location Address2040 E MARIPOSA AVEEl Segundo, CA 90245-5027
Mailing Address2040 E Mariposa AveEl Segundo, CA 90245-5027 · (213) 266-5600 · Fax (562) 548-2304
Phone(213) 266-5600
Fax(562) 548-2304
Organization SubpartNo
Authorized OfficialLeonard S SenderPresident · (714) 615-2350
Enumeration DateMay 3, 2017
Last NPPES UpdateOctober 20, 20236 updates tracked since enumeration
NPPES CertifiedOctober 20, 2023
✔ NPI 1215463799 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X
2040 E MARIPOSA AVE, El Segundo, CA 90245
Open in Google Maps ↗

Other Names 1

Doing Business AsChan Soon Shiong Institute For Medicine

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Chan Soon Shiong Institute For Medicine is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Chan Soon Shiong Institute For Medicine, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

Sandeep Reddy, M.D.
Hematology/Oncology
NPI 1275601775
2040 E MARIPOSA AVE
El Segundo, CA 90245
(213) 266-5600
✔ PECOSSame address
Leonard Sender, MD
Hematology/Oncology
NPI 1952499741
2040 E MARIPOSA AVE
El Segundo, CA 90245
(213) 266-5600
✔ PECOS✔ Accepts MedicareSame address
Chaitali Nangia, MD
Hematology
NPI 1669425286
1640 NEWPORT BLVD STE 370
Costa Mesa, CA 92627
(949) 288-5701
✔ PECOS✔ Accepts Medicare33 mi
Tara Seery
Internal Medicine
NPI 1043415961
16105 SAND CANYON AVE STE 230
Irvine, CA 92618
(949) 764-5347
✔ PECOS✔ Accepts Medicare40 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Accreditation 05D2144811

Chan Soon-Shiong Institute For Medicine · El Segundo, CA
Active · expires Jul 2, 2028
CLIA Number05D2144811
Laboratory TypePhysician Office
Certificate Effective DateJuly 3, 2026
Certificate Expiration DateJuly 2, 2028
Laboratory DirectorAaron Sassoon
Laboratory Phone(213) 266-5600
Laboratory LocationChan Soon-Shiong Institute For Medicine2040 E Mariposa, El Segundo, CA 90245
CLIA data matches this NPI record on: Address Name Phone
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

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 Immuno-Oncology Clinic Inc.'s NPI number?

The NPI number for Immuno-Oncology Clinic Inc. is 1215463799. It was assigned to this organization in the NPPES registry on May 3, 2017. The provider is doing business as Chan Soon Shiong Institute For Medicine.

Where is Immuno-Oncology Clinic Inc. located?

Immuno-Oncology Clinic Inc. is located at 2040 E Mariposa Ave, El Segundo, CA 90245. The listed phone number is (213) 266-5600.

What is Immuno-Oncology Clinic Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Immuno-Oncology Clinic Inc. enrolled in Medicare?

Yes. Immuno-Oncology Clinic Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Immuno-Oncology Clinic Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians reassign their Medicare billing to Immuno-Oncology Clinic Inc., in Hematology, Hematology/Oncology and Internal Medicine. 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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Immuno-Oncology Clinic Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 05D2144811) is associated with this NPI, valid through July 2, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Immuno-Oncology Clinic Inc. was last updated on October 20, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.