Leonard S. Sender, MD
Pediatric Hematology & Oncology Physician · El Segundo, CA
Leonard S. Sender, MD is a pediatric hematology & oncology physician with a practice address in El Segundo, California, and NPI 1952499741, issued on Oct 10, 2006. Check the license (California A41293, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leonard S. Sender
- Credential
- MD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License number
- A41293 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2040 E Mariposa Ave, El Segundo, CA 90245
- Phone
- (213) 266-5600
- Enumerated
- Oct 10, 2006
- Record last updated
- Oct 1, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid ID
- 00A412930 CA
- Medicare enrollment
- Enrolled (PECOS I20040219000951); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 417 in California → Look up another NPI →
Also registered at 2040 E Mariposa Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elise Diner, P.A.-CPhysician Assistant1902237894
- John Lee, MDOtolaryngology Physician1114910239
- Katayoun Moini, PAPhysician Assistant1770581423
- Sandeep Reddy, M.D.Specialist1275601775
- Jamie Taylor, M.D.Anesthesiology Physician1437217767
Verify Leonard S. Sender in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A41293Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Immuno-Oncology Clinic IncEl Segundo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leonard S. Sender among 417 pediatric hematology & oncology physician records in California
Leonard S. Sender, MD is one of 417 pediatric hematology & oncology physician records with a practice address in California. 53% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 65% newer
- In a Medicare fileYes · 53% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated1982 · median 2004 among the 120 with a school on file
- Record last updated2018 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0207X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Hematology & Oncology Physician providers in California
There are 417 pediatric hematology & oncology physician records in California.
All 417 in California → Every provider in El Segundo → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Naveen Qureshi, M.D.Downey, CA 902421962652016
- Erin Boatsman, M.D.Los Angeles, CA 900951730202565
- David Buchbinder, MDLos Angeles, CA 900951871734509
- Vivian Chang, M.D.Los Angeles, CA 900951255595229
- Jong Chung, M.D.Los Angeles, CA 900951134311475
- Gay Crooks, MDLos Angeles, CA 900951659479129
- Noah Federman, M.D.Los Angeles, CA 900951306045398
- Steven Jonas, M.D., PH.D.Los Angeles, CA 900951295092740
Common questions
What is Leonard S. Sender, MD's NPI number?
Leonard S. Sender, MD's National Provider Identifier (NPI) is 1952499741, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard S. Sender, MD located?
The NPPES record lists a practice address at 2040 E Mariposa Ave, El Segundo, CA, 90245. Phone: (213) 266-5600. Providers update this record themselves, so call before visiting.
How can I verify Leonard S. Sender, MD's license?
NPPES lists California license number A41293, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.