Expertise in
16
conditions

Dr. Leo Mascarenhas

Hematology | Oncology
Samuel Oschin Cancer Center
127 S San Vicente Blvd # 7, 
Los Angeles, CA 
Expertise in
16
conditions
Samuel Oschin Cancer Center
127 S San Vicente Blvd # 7, 
Los Angeles, CA 

Overview

Leo Mascarenhas is a Hematologist and an Oncologist practicing medicine in Los Angeles, California.

Dr. Mascarenhas is highly rated in 16 conditions, according to our data. His clinical expertise encompasses Rhabdomyosarcoma, Adult Soft Tissue Sarcoma, Ewing Sarcoma, Bone Marrow Aspiration, and Tissue Biopsy.

He is actively involved in clinical research, co-authoring 104 peer reviewed articles and participating in 91 clinical trials.

Specialties

Hematology
Oncology

Licenses

Pediatric Hematology-Oncology in CA

Languages Spoken

English

Gender

Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

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Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem BCBS
  • EPO
  • HMO
  • POS
  • PPO
Blue Shield of California
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE-MEDICAID PLAN
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Cigna
  • EPO
  • HMO
  • PPO
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
Optima Health
  • HMO
  • POS
Oscar
  • EPO
  • HMO
  • PPO
Trustmark
  • PPO
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 4 Less Insurance Carriers -

Locations

Samuel Oschin Cancer Center
127 S San Vicente Blvd # 7, Los Angeles, CA 90048

Additional Areas of Focus

Dr. Mascarenhas has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.

Immune Thrombocytopenic Purpura (ITP)
Neurofibromatosis Type 1 (NF1)

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.

90 Clinical Trials

A Safety, Pharmacokinetic and Efficacy Study of a y-Secretase Inhibitor, Nirogacestat (PF-03084014), in Children and Adolescents With Progressive, Surgically Unresectable Desmoid Tumors
A Safety, Pharmacokinetic and Efficacy Study of a y-Secretase Inhibitor, Nirogacestat (PF-03084014), in Children and Adolescents With Progressive, Surgically Unresectable Desmoid Tumors
Enrollment Status: Active_not_recruiting
Publish Date: April 15, 2026
Intervention Type: Other, Procedure, Drug
Study Drug: Nirogacestat
Study Phase: Phase 2
NCI-COG Pediatric MATCH (Molecular Analysis for Therapy Choice) Screening Protocol
NCI-COG Pediatric MATCH (Molecular Analysis for Therapy Choice) Screening Protocol
Enrollment Status: Active_not_recruiting
Publish Date: April 14, 2026
Intervention Type: Procedure, Drug, Other
Study Drugs: Ensartinib, Erdafitinib, Larotrectinib, Olaparib, Palbociclib, Samotolisib, Selpercatinib, Selumetinib Sulfate, Tazemetostat, Tipifarnib, Ulixertinib, Vemurafenib
Study Phase: Phase 2
A Phase III, Randomized Study of Nivolumab (Opdivo) Plus AVD or Brentuximab Vedotin (Adcetris) Plus AVD in Patients (Age >/= 12 Years) With Newly Diagnosed Advanced Stage Classical Hodgkin Lymphoma
A Phase III, Randomized Study of Nivolumab (Opdivo) Plus AVD or Brentuximab Vedotin (Adcetris) Plus AVD in Patients (Age >/= 12 Years) With Newly Diagnosed Advanced Stage Classical Hodgkin Lymphoma
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Drug, Biological, Procedure, Other, Radiation
Study Drugs: Brentuximab, Dacarbazine, Doxorubicin, Filgrastim, Nivolumab, Pegfilgrastim, Vinblastine
Study Phase: Phase 3
Pazopanib Neoadjuvant Trial in Non-Rhabdomyosarcoma Soft Tissue Sarcomas (PAZNTIS): A Phase II/III Randomized Trial of Preoperative Chemoradiation or Preoperative Radiation Plus or Minus Pazopanib (NSC# 737754)
Pazopanib Neoadjuvant Trial in Non-Rhabdomyosarcoma Soft Tissue Sarcomas (PAZNTIS): A Phase II/III Randomized Trial of Preoperative Chemoradiation or Preoperative Radiation Plus or Minus Pazopanib (NSC# 737754)
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Drug, Radiation, Procedure
Study Drugs: Doxorubicin, Ifosfamide, Pazopanib
Study Phase: Phase 2/Phase 3
Randomized Phase 3 Trial Evaluating the Addition of the IGF-1R Monoclonal Antibody Ganitumab (AMG 479, NSC# 750008) to Multiagent Chemotherapy for Patients With Newly Diagnosed Metastatic Ewing Sarcoma
Randomized Phase 3 Trial Evaluating the Addition of the IGF-1R Monoclonal Antibody Ganitumab (AMG 479, NSC# 750008) to Multiagent Chemotherapy for Patients With Newly Diagnosed Metastatic Ewing Sarcoma
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Drug, Procedure, Biological, Radiation
Study Drugs: Cyclophosphamide, Doxorubicin, Doxorubicin Hydrochloride, Etoposide, Etoposide Phosphate, Ganitumab, Ifosfamide, Vincristine, Vincristine Sulfate
Study Phase: Phase 3
A Randomized Phase 3 Trial of Nivolumab (NSC# 748726) in Combination With Chemo-Immunotherapy for the Treatment of Newly Diagnosed Primary Mediastinal B-Cell Lymphoma
A Randomized Phase 3 Trial of Nivolumab (NSC# 748726) in Combination With Chemo-Immunotherapy for the Treatment of Newly Diagnosed Primary Mediastinal B-Cell Lymphoma
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Biological, Drug, Procedure, Radiation
Study Drugs: Cyclophosphamide, Doxorubicin Hydrochloride, Etoposide Phosphate, Filgrastim, Nivolumab, Pegfilgrastim, Prednisolone, Prednisone, Rituximab, Rituximab+Hyaluronidase Human, Vincristine Sulfate
Study Phase: Phase 3
A Phase 3 Trial Investigating Blinatumomab (NSC# 765986) in Combination With Chemotherapy in Patients With Newly Diagnosed Standard Risk or Down Syndrome B-Lymphoblastic Leukemia (B-ALL) and the Treatment of Patients With Localized B-Lymphoblastic Lymphoma (B-LLy)
A Phase 3 Trial Investigating Blinatumomab (NSC# 765986) in Combination With Chemotherapy in Patients With Newly Diagnosed Standard Risk or Down Syndrome B-Lymphoblastic Leukemia (B-ALL) and the Treatment of Patients With Localized B-Lymphoblastic Lymphoma (B-LLy)
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Drug, Biological, Radiation
Study Drugs: Erwinia Asparaginase, Blinatumomab, Cyclophosphamide, Cytarabine, Dexamethasone, Doxorubicin Hydrochloride, Leucovorin Calcium, Mercaptopurine, Methotrexate, Pegaspargase, Prednisolone, Prednisone, Thioguanine, Vincristine Sulfate
Study Phase: Phase 3
A Pilot Induction Regimen Incorporating Chimeric 14.18 Antibody (ch14.18, Dinutuximab) (NSC# 764038) and Sargramostim (GM-CSF) for the Treatment of Newly Diagnosed High-Risk Neuroblastoma
A Pilot Induction Regimen Incorporating Chimeric 14.18 Antibody (ch14.18, Dinutuximab) (NSC# 764038) and Sargramostim (GM-CSF) for the Treatment of Newly Diagnosed High-Risk Neuroblastoma
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Drug, Biological, Procedure, Radiation
Study Drugs: Carboplatin, Cisplatin, Cyclophosphamide, Dexrazoxane, Dinutuximab, Doxorubicin, Etoposide, Isotretinoin, Melphalan, Sargramostim, Thiotepa, Topotecan, Vincristine
Study Phase: Phase 2
A Randomized Phase 3 Study of Vincristine, Dactinomycin, Cyclophosphamide (VAC) Alternating With Vincristine and Irinotecan (VI) Versus VAC/VI Plus Temsirolimus (TORI, Torisel, NSC# 683864) in Patients With Intermediate Risk (IR) Rhabdomyosarcoma (RMS)
A Randomized Phase 3 Study of Vincristine, Dactinomycin, Cyclophosphamide (VAC) Alternating With Vincristine and Irinotecan (VI) Versus VAC/VI Plus Temsirolimus (TORI, Torisel, NSC# 683864) in Patients With Intermediate Risk (IR) Rhabdomyosarcoma (RMS)
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Radiation, Drug, Biological, Other
Study Drugs: Cyclophosphamide, Dactinomycin, Irinotecan hydrochloride, Temsirolimus, Vincristine sulfate, Vinorelbine
Study Phase: Phase 3
NCI-COG Pediatric MATCH (Molecular Analysis for Therapy Choice)- Phase 2 Subprotocol of Ensartinib in Patients With Tumors Harboring ALK or ROS1 Genomic Alterations
NCI-COG Pediatric MATCH (Molecular Analysis for Therapy Choice)- Phase 2 Subprotocol of Ensartinib in Patients With Tumors Harboring ALK or ROS1 Genomic Alterations
Enrollment Status: Active_not_recruiting
Publish Date: April 13, 2026
Intervention Type: Procedure, Other, Drug
Study Drug: Ensartinib
Study Phase: Phase 2
View 9 Less Clinical Trials

104 Total Publications

Molecular Characterization Informs Prognosis in Patients With Localized Ewing Sarcoma: A Report From the Children's Oncology Group.
Molecular Characterization Informs Prognosis in Patients With Localized Ewing Sarcoma: A Report From the Children's Oncology Group.
Journal: Journal of clinical oncology : official journal of the American Society of Clinical Oncology
Published: November 03, 2025
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Frequently Asked Questions about Dr. Leo Mascarenhas

How do I make an appointment with Dr. Leo Mascarenhas?

You can book an appointment with Dr. Leo Mascarenhas by calling their office at 310-423-8030. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.

Is Dr. Leo Mascarenhas a top-rated expert for Rhabdomyosarcoma?

MediFind is an objective health platform that identifies experts based on real-world data. Dr. Leo Mascarenhas is classified as an Elite expert for Rhabdomyosarcoma, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.

What conditions does Dr. Leo Mascarenhas specialize in?

While Dr. Leo Mascarenhas is a Hematology, they have specific expertise in Rhabdomyosarcoma, Adult Soft Tissue Sarcoma, and Ewing Sarcoma. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Hematology.

Does Dr. Leo Mascarenhas participate in research or clinical trials?

Yes. Dr. Leo Mascarenhas has published 104 articles and abstracts on conditions like Rhabdomyosarcoma. You can view a list of Dr. Leo Mascarenhas's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.

Does Dr. Leo Mascarenhas accept my insurance?

Dr. Leo Mascarenhas accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 310-423-8030 to verify that your specific plan is currently accepted before your visit.

Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

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