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Preventive Medicine/Occupational Environmental Medicine in Los Angeles, California

Data updated monthly · Last refresh September 2026

5 Preventive Medicine/Occupational Environmental Medicine providers practice in Los Angeles. Listings are drawn from federal public records and are not endorsements.

Preventive Medicine/Occupational Environmental 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. Frank Gilliland, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 442-1096
Dr. Matthew Sies, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 642-0325
Dr. Natasha Narayan, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 646-5520
Dr. Robert Brooks, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (818) 705-3414
Dr. Susan Bradshaw, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 665-0300

Common questions

How many Preventive Medicine/Occupational Environmental Medicine providers are in Los Angeles, California?

There are 5 Preventive Medicine/Occupational Environmental 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 Preventive Medicine/Occupational Environmental 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.