HealthcareDiscovery.AI / Doctors / California / Occupational Medicine

Occupational Medicine Doctors in California

Data updated monthly · Last refresh October 2026

414 Occupational Medicine providers practice in California, including 8 (2%) offering telehealth. The largest concentration is in San Diego. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

414providers
8telehealth
San Diegotop city

Occupational Medicine by city in California

Choose a city to see providers there.

Occupational Medicine in San Diego37 providers
Occupational Medicine in San Francisco24 providers
Occupational Medicine in Los Angeles23 providers
Occupational Medicine in Sacramento16 providers
Occupational Medicine in Oakland11 providers
Occupational Medicine in Loma Linda9 providers
Occupational Medicine in Irvine9 providers
Occupational Medicine in Long Beach7 providers
Occupational Medicine in San Jose7 providers
Occupational Medicine in Bakersfield7 providers
Occupational Medicine in Anaheim7 providers
Occupational Medicine in Fresno6 providers
Occupational Medicine in Riverside6 providers
Occupational Medicine in Orange5 providers
Occupational Medicine in Milpitas5 providers
Occupational Medicine in Stockton5 providers
Occupational Medicine in Rancho Cucamonga5 providers
Occupational Medicine in Vallejo5 providers
Occupational Medicine in Cupertino5 providers
Occupational Medicine in Roseville4 providers
Occupational Medicine in Richmond4 providers
Occupational Medicine in South San Francisco4 providers
Occupational Medicine in Sunnyvale4 providers
Occupational Medicine in Walnut Creek4 providers

Occupational Medicine providers in California

Listed by city, largest first. 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. Marilyn Zwass
Los Angeles, CA · No drug or device payments recorded (2025) · (818) 784-1354
Dr. Mark Goldstein, DO
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Paul Papanek Jr., MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Philip Baily, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 215-1600
Dr. Phyllis Paul-jordan, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 367-2001
Dr. Seung Lee, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 367-2001
Dr. Tack Lam, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Zhiqiang Chen, M.D.
Manteca, CA · No drug or device payments recorded (2025) · (209) 825-3531
Dr. Julie Nefkens, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Kathryn Raphael, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Michael Robinette, MD
Merced, CA · No drug or device payments recorded (2025) · (209) 205-1001
Dr. Ellen Lois Pichey, M.D.
Mill Valley, CA · No drug or device payments recorded (2025) · (415) 381-4128
Dr. Arvind Jaini, MD
Milpitas, CA · No drug or device payments recorded (2025) · (650) 945-2900
Dr. Daniel Polite, MD
Milpitas, CA · No drug or device payments recorded (2025) · (650) 945-2900
Dr. Diana Johns, MD
Milpitas, CA · No drug or device payments recorded (2025) · (408) 957-5700
Dr. Peter Chiu, MD
Milpitas, CA · No drug or device payments recorded (2025) · (650) 945-2900
Dr. Ramon Garcia, MD
Milpitas, CA · No drug or device payments recorded (2025) · (650) 945-2900
Dr. Alexis Dasig, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Martin Pricco, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Ronald Whitmore, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 557-1000
Dr. Stephen Sparks, MD
Moreno Valley, CA · No drug or device payments recorded (2025) · (951) 486-5984
Dr. Zizhuang Li, M.D.
Moreno Valley, CA · $62 in drug and device payments (2025) · (951) 924-5770
Dr. Jordan Firestone, MD, PHD, MPH
Mountain View, CA · No drug or device payments recorded (2025) · (650) 554-0844
Dr. Pravin Kumar Patel, MD
Mt View, CA · No drug or device payments recorded (2025) · (650) 967-7471
Dr. Brian Boni, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 257-4084
Dr. Claude Newman, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 253-8084
Dr. Kenneth Wilkes, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 258-2500
Dr. Guy Zimbardi
National City, CA · No drug or device payments recorded (2025) · (619) 474-8666
Dr. Dan Sheppard, D.C.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 387-0456
Dr. Erik Won, D.O., M.P.H.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 851-3086
Dr. Michael Land, D.O.
Newport Beach, CA · No drug or device payments recorded (2025) · (510) 439-7933
Dr. Ramon Bagby
North Hills, CA · No drug or device payments recorded (2025) · (123) 456-7890
Dr. Aftim Saba, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 874-8280
Dr. Charles Laroche, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. David Jourgensen, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (615) 778-4066
Dr. Dinesh Govindarao, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (615) 778-4066
Dr. Douglas Benner, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 987-1000
Dr. Elyssa Wasserberg, DC
Oakland, CA · No drug or device payments recorded (2025) · (510) 465-9565
Dr. Hong Zhang, M.D. M.P.H. MS
Oakland, CA · $163 in drug and device payments (2025) · (510) 735-5998
Dr. Hui Han
Oakland, CA · No drug or device payments recorded (2025) · (510) 625-6262
Dr. James Seward, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 912-4973
Dr. Ranyelle Ramos
Oakland, CA · No drug or device payments recorded (2025) · (123) 456-7890
Dr. William Hopper, MD
Oakland, CA · $256 in drug and device payments (2025) · (510) 465-9810
Dr. Gilbert Bush, MEDICAL DOCTOR
Ontario, CA · No drug or device payments recorded (2025) · (909) 460-4155
Dr. Patricia Fernandez, M.D.
Ontario, CA · No drug or device payments recorded (2025) · (909) 605-8888
Dr. William Downs, M.D.
Ontario, CA · No drug or device payments recorded (2025) · (615) 778-4066
Dr. Dean B Baker, MD
Orange, CA · No drug or device payments recorded (2025) · (714) 456-8978
Dr. Elliott Kornhauser, MD
Orange, CA · No drug or device payments recorded (2025) · (714) 456-8978
Dr. Jessica Chuang, M.D.
Orange, CA · $23 in drug and device payments (2025) · (626) 233-7475
Dr. Leslie M Israel, DO
Orange, CA · No drug or device payments recorded (2025) · (714) 456-8978

Common questions

How many Occupational Medicine providers are in California?

There are 414 Occupational Medicine providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Occupational Medicine providers in California offer telehealth?

Yes. 8 of the 414 Occupational Medicine providers in California (about 2%) report offering telehealth services in CMS data.

Which cities in California have the most Occupational Medicine providers?

San Diego (37), San Francisco (24), Los Angeles (23) have the highest concentration of Occupational Medicine providers in California.

How many Occupational Medicine providers in California received drug or device company payments?

44 of 414 Occupational Medicine providers in California (11%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

Where does this data come from?

Provider counts and profiles 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.

Related reading on HealthcareDiscovery.AI

Occupational Medicine in all 50 states Search all 414 in the directory Ask Zach for help choosing

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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. Are you a Occupational Medicine in California? Get featured.