Leo Mascarenhas, MD
Pediatric Hematology & Oncology Physician · Los Angeles, CA
Leo Mascarenhas, MD is a pediatric hematology & oncology physician with a practice address in Los Angeles, California, and NPI 1417057225, issued on Sep 22, 2006. Check the license (California A54324, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leo Mascarenhas
- Credential
- MD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License number
- A54324 CA
Self-reported in NPPES; status is on the state search - Practice location
- 127 S San Vicente Blvd FL 7, Los Angeles, CA 90048
- Phone
- (310) 423-4423
- Enumerated
- Sep 22, 2006
- Record last updated
- Jul 23, 2025
- Fax
- (310) 423-4131
- Medicaid ID
- 00A54324A CA
- Medicare enrollment
- Enrolled (PECOS I20100518000251); 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 127 S San Vicente Blvd FL 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jin Sun Bitar, M.D.Medical Oncology Physician1477940161
- Karissa Britten, MDHematology & Oncology Physician1518461862
- Victoria Cerda, MD, MPHObstetrics & Gynecology Physician1265929715
- Jason Chan, M.D. PH.D.Hematology & Oncology Physician1154735660
- Fahima Dossa, MDSurgical Oncology Physician1427832617
Verify Leo Mascarenhas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A54324Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $1,885.00
1 payment: consulting fee; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 1,215 providers of this specialty with any payment received $7,404.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Cedars-Sinai Medical CenterWest Hollywood, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Leo Mascarenhas among 417 pediatric hematology & oncology physician records in California
Leo Mascarenhas, 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
- Graduated1990 · median 2004 among the 120 with a school on file
- Record last updated2025 · 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 Los Angeles → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Nicole Baca, MDWest Hollywood, CA 900481093077802
- Carol Hurvitz, M.D.Los Angeles, CA 900481669544102
- Fataneh Majlessipour, M.D.Los Angeles, CA 900481740330927
- Satiro De Oliveira, M.D.Los Angeles, CA 900451033360771
- Richard Shearer, MDLos Angeles, CA 900341407915077
- Sara Kreimer, M.D.Los Angeles, CA 900331265783039
- Jayme OginoLos Angeles, CA 900331366947244
- Michael Siegel, MDLos Angeles, CA 900681861512881
Common questions
What is Leo Mascarenhas, MD's NPI number?
Leo Mascarenhas, MD's National Provider Identifier (NPI) is 1417057225, issued on Sep 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leo Mascarenhas, MD located?
The NPPES record lists a practice address at 127 S San Vicente Blvd FL 7, Los Angeles, CA, 90048. Phone: (310) 423-4423. Providers update this record themselves, so call before visiting.
How can I verify Leo Mascarenhas, MD's license?
NPPES lists California license number A54324, 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.