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 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. Ulrike Luderer, MDIrvine, CA · No drug or device payments recorded (2025) ·
(949) 824-8641 Dr. Brian Lee, MDIrwindale, CA · $45 in drug and device payments (2025) ·
(626) 960-5361 Dr. Christopher Bickford, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 454-7171 Dr. Robert Dinenberg, M.D.La Jolla, CA · $23 in drug and device payments (2025) ·
(858) 450-1212 Dr. Craig Uejo, M.D.La Mesa, CA · No drug or device payments recorded (2025) ·
(619) 644-6600 Dr. Michael Hughes, M.D.La Mesa, CA · No drug or device payments recorded (2025) ·
(619) 644-6600 Dr. Bob Mcclure, M.D.La Mirada, CA · No drug or device payments recorded (2025) ·
(562) 921-0341 Dr. Nathaniel Bautista, M.D.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 945-5984 Dr. Stephen Greene, M.D.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 945-5999 Dr. Vikas Jindal, MDLancaster, CA · No drug or device payments recorded (2025) · Telehealth ·
(661) 726-2106 Dr. Jay Fuller, PTLa Palma, CA · No drug or device payments recorded (2025) ·
(714) 522-8020 Dr. Joseph Guerrero, M.D.La Palma, CA · $761 in drug and device payments (2025) ·
(714) 522-8020 Dr. Miguel Montoya-villagomez, D.O.Lemoore, CA · No drug or device payments recorded (2025) ·
(559) 998-0558 Dr. Oliver Chiong, M.D.Lemoore, CA · No drug or device payments recorded (2025) ·
(559) 998-4481 Dr. Dan Azar, MD MPHLivermore, CA · $150 in drug and device payments (2025) ·
(925) 294-2700 Dr. Patrick Keller, MDLivermore, CA · No drug or device payments recorded (2025) ·
(925) 424-2544 Dr. Richard Watts, M.D., M.P.H.Livermore, CA · No drug or device payments recorded (2025) ·
(925) 422-7459 Dr. Alfred Quansah, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-6222 Dr. Andrew Guo, MD, MPH, MBALoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 825-7084 Dr. Haitham Juma, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-8131 Dr. Hyukje Sung, MD, MALoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-6491 Dr. Jennifer Vogt, MDLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4918 Dr. Joshua Padilla, DOLoma Linda, CA · $18 in drug and device payments (2025) ·
(909) 558-4000 Dr. Nasrin KazemiLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-6558 Dr. Nathan NellessenLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-6491 Dr. Timothy Won, MDLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 518-3401 Dr. Atonis Pax, D.O.Long Beach, CA · No drug or device payments recorded (2025) ·
(562) 920-8394 Dr. Charles Tang, M.D.Long Beach, CA · No drug or device payments recorded (2025) ·
(562) 437-0831 Dr. Christopher Tang, MDLong Beach, CA · No drug or device payments recorded (2025) ·
(562) 437-0831 Dr. Ernest ProchazkaLong Beach, CA · No drug or device payments recorded (2025) ·
(361) 537-3576 Dr. Frederick Asche, M.D.Long Beach, CA · No drug or device payments recorded (2025) ·
(562) 933-0085 Dr. Helen Tang, M.D.Long Beach, CA · $164 in drug and device payments (2025) ·
(562) 437-0831 Dr. Irene Grace, M.D., M.P.H.Long Beach, CA · No drug or device payments recorded (2025) ·
(562) 570-4053 Dr. Gary Fujimoto, M.D.Los Altos, CA · $17,416 in drug and device payments (2025) ·
(650) 619-6011 Dr. Barry Huang, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 215-1600 Dr. Bernice Jackson, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(213) 989-7168 Dr. Bhavesh Robert Pandya, MD, MPHLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-8201 Dr. Delaney Smith, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 301-2030 Dr. Donna Cloughen, D.O.Los Angeles, CA · No drug or device payments recorded (2025) ·
(615) 778-4066 Dr. Hai Le, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(615) 778-4066 Dr. Han-chi Wong, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(213) 367-2004 Dr. Irene Tang, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(213) 749-5386 Dr. James Lemus, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 260-7900 Dr. Jarrod Matthei, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-6771 Dr. John Barchilon, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. John Barone, D.O.Los Angeles, CA · $20 in drug and device payments (2025) ·
(310) 360-6780 Dr. John Norton, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Jonathan Rubinow, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 333-8798 Dr. Kao Choy Sae Chao, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 405-9292 Dr. Marc Arnush, M.D., M.P.H.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 215-6020 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.
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