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Hematology & Oncology in Los Angeles, California

Data updated monthly · Last refresh September 2026

152 Hematology & Oncology providers practice in Los Angeles, and 68% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Hematology & Oncology providers in Los Angeles

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Grant Jirka, MD
Los Angeles, CA · $3,573 in drug and device payments (2025) · (323) 865-3823
Dr. Haley Castiglione, N.P.
Los Angeles, CA · $53 in drug and device payments (2025) · (310) 825-6301
Dr. Hannah Lee, MD
Los Angeles, CA · $227 in drug and device payments (2025) · Telehealth · (310) 423-1160
Dr. Hao Zhang, M.D.
Los Angeles, CA · $7,468 in drug and device payments (2025) · Telehealth · (323) 264-0430
Dr. Howard Liebman, M.D.
Los Angeles, CA · $13,574 in drug and device payments (2025) · (323) 865-3105
Dr. Hung Tran
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 361-4100
Dr. Iman Abdalla, MD
Los Angeles, CA · $350 in drug and device payments (2025) · Telehealth · (323) 783-4011
Dr. Inderjit Mehmi, M.D.
Los Angeles, CA · $49,010 in drug and device payments (2025) · Telehealth · (310) 231-2121
Dr. Jason Chan, M.D. PH.D.
Los Angeles, CA · $296 in drug and device payments (2025) · Telehealth · (310) 423-8530
Dr. Jason Ho, M.D.
Los Angeles, CA · $8,182 in drug and device payments (2025) · Telehealth · (213) 977-1214
Dr. Jeffrey Lin, MD PHD
Los Angeles, CA · No drug or device payments recorded (2025) · (267) 648-3417
Dr. Jeffrey Weisz, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Jennifer Gansert, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Jennifer Malin, MD, PHD
Los Angeles, CA · $21,485 in drug and device payments (2025) · (310) 478-3711
Dr. Jenny Zhou, M.D.
Los Angeles, CA · $217 in drug and device payments (2025) · (323) 865-3000
Dr. Joanne Schottinger, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Joel Hecht, MD
Los Angeles, CA · $7,861 in drug and device payments (2025) · Telehealth · (310) 586-2097
Dr. John Glaspy, MD
Los Angeles, CA · $72 in drug and device payments (2025) · Telehealth · (310) 794-4955
Dr. John Hu, M.D.
Los Angeles, CA · $4,002 in drug and device payments (2025) · Telehealth · (323) 865-3823
Dr. John Lee, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 794-7700
Dr. John Shen, M.D.
Los Angeles, CA · $3,753 in drug and device payments (2025) · (818) 995-8044
Dr. John Timmerman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 794-5511
Dr. Joomee Shim
Los Angeles, CA · $629 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Jorge Nieva, M.D.
Los Angeles, CA · $23,456 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Joseph Nimoy, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Joshua Sasine, M.D.
Los Angeles, CA · $163 in drug and device payments (2025) · Telehealth · (310) 206-6909
Dr. Justin Wayne Tiulim, M.D.
Los Angeles, CA · $617 in drug and device payments (2025) · Telehealth · (323) 409-1000
Dr. Karissa Britten, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 888-8680
Dr. Karrune Woan
Los Angeles, CA · $80 in drug and device payments (2025) · Telehealth · (323) 865-0060
Dr. Kevin Kelly, M.D.
Los Angeles, CA · $77,369 in drug and device payments (2025) · Telehealth · (323) 865-3950
Dr. Kristopher Wentzel, M.D.
Los Angeles, CA · $20 in drug and device payments (2025) · Telehealth · (323) 226-7556
Dr. Lasika Seneviratne, M.D.
Los Angeles, CA · $7,956 in drug and device payments (2025) · Telehealth · (213) 977-1214
Dr. Lauren Midthun, MD, DDS
Los Angeles, CA · $1,536 in drug and device payments (2025) · Telehealth · (310) 231-2121
Dr. Lauren Pinter-brown, MD
Los Angeles, CA · $4,795 in drug and device payments (2025) · Telehealth · (310) 829-5471
Dr. Lawrence Piro, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 231-2121
Dr. Leonid Kleynberg, M.D.
Los Angeles, CA · $1,554 in drug and device payments (2025) · Telehealth · (323) 965-9995
Dr. Leo Orr, M.D.
Los Angeles, CA · $3,554 in drug and device payments (2025) · Telehealth · (213) 481-3948
Dr. Madeline Macdonald, MD
Los Angeles, CA · $99 in drug and device payments (2025) · (310) 794-4955
Dr. Mahshid Mosallaei-benjamin, M.D.
Los Angeles, CA · $31 in drug and device payments (2025) · Telehealth · (310) 825-5756
Dr. Maria Dungo, M.D.
Los Angeles, CA · $160 in drug and device payments (2025) · (310) 231-2121
Dr. Maria Velez Velez, M.D.
Los Angeles, CA · $8,044 in drug and device payments (2025) · Telehealth · (310) 794-4955
Dr. Marjorie Bernstein-singer, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Mark Forsberg, MD
Los Angeles, CA · $166 in drug and device payments (2025) · (800) 872-2273
Dr. Mary Ichiuji, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Mary Territo, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-6909
Dr. Matthew Rettig, MD
Los Angeles, CA · $51,111 in drug and device payments (2025) · Telehealth · (310) 794-7152
Dr. Maxwell Kroloff, M.D.
Los Angeles, CA · $85 in drug and device payments (2025) · Telehealth · (310) 825-7375
Dr. Michael Cho, MD
Los Angeles, CA · $865 in drug and device payments (2025) · Telehealth · (301) 514-7397
Dr. Michael Glowalla, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Michael Maranzano, M.D.
Los Angeles, CA · $1,375 in drug and device payments (2025) · (323) 409-7804

Conditions Hematology & Oncology providers in Los Angeles, California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Hematology & Oncology providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Hematology & Oncology providers are in Los Angeles, California?

There are 152 Hematology & Oncology providers with active NPI records practicing in Los Angeles, according to federal NPPES data refreshed monthly.

How many Hematology & Oncology providers in Los Angeles received drug or device company payments?

104 of 152 (68%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Hematology & Oncology providers in Los Angeles treat?

Hematology & Oncology providers in Los Angeles commonly treat breast cancer, lung cancer, lymphoma, leukemia, anemia and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Los Angeles Hematology & Oncology across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.