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Hematology (Internal Medicine) in Los Angeles, California

Data updated monthly · Last refresh September 2026

14 Hematology (Internal Medicine) providers practice in Los Angeles. Listings are drawn from federal public records and are not endorsements.

Hematology (Internal Medicine) 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. Anil Tulpule, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3000
Dr. Caitlin O'neill
Los Angeles, CA · $673 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Caroline Piatek, M.D,
Los Angeles, CA · $75,983 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Donald Feinstein, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (626) 457-5839
Dr. Doris Quon, M.D.
Los Angeles, CA · $252,825 in drug and device payments (2025) · Telehealth · (213) 742-1000
Dr. Erwin Grussie
Los Angeles, CA · $467 in drug and device payments (2025) · Telehealth · (310) 231-2121
Dr. Giridharan Ramsingh, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3913
Dr. Hitomi Hosoya, MD
Los Angeles, CA · $308 in drug and device payments (2025) · (310) 423-1160
Dr. Ilene Weitz, M.D.
Los Angeles, CA · $42,349 in drug and device payments (2025) · (323) 865-3105
Dr. Nneka Nwachukwu, MD
Los Angeles, CA · $163 in drug and device payments (2025) · Telehealth · (323) 865-3913
Dr. Parkash Gill, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (626) 457-5839
Dr. Robert Chen, MD
Los Angeles, CA · $18 in drug and device payments (2025) · (303) 913-4146
Dr. Susan Claster, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (424) 338-2801
Dr. Zaw Myint, M.D.
Los Angeles, CA · $116 in drug and device payments (2025) · Telehealth · (323) 865-3105

Common questions

How many Hematology (Internal Medicine) providers are in Los Angeles, California?

There are 14 Hematology (Internal Medicine) providers with active NPI records practicing in Los Angeles, according to federal NPPES data refreshed monthly.

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 (Internal Medicine) 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.