Addiction Medicine Doctors (Family Medicine) in California
Data updated monthly · Last refresh October 2026
129 Addiction Medicine (Family Medicine) providers practice in California, including 19 (15%) offering telehealth. The largest concentration is in Ventura. 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.
129providers
19telehealth
Venturatop city
Addiction Medicine (Family Medicine) by city in California
Choose a city to see providers there.
Where Addiction Medicine Doctors (Family Medicine) in California practice
From CMS Medicare enrollment records covering 62 of the 129 providers listed here (48%). Providers who do not bill Medicare are not included in these figures.
23%solo or small practice (under 10 clinicians)
24%mid-size group (10 to 99)
53%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Addiction Medicine Doctors (Family Medicine) | All clinicians in group | Main city |
| County of Ventura | 9 | 340 | Ventura |
| Community Memorial Health System | 4 | 187 | Ventura |
| Southern California Permanente Medical Group | 3 | 11,250 | Moreno Valley |
| Sutter Bay Medical Foundation | 3 | 3,783 | Palo Alto |
| Permanente Medical Group Inc. | 2 | 10,928 | San Leandro |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Addiction Medicine Doctors (Family Medicine) affiliated |
| Ventura County Medical Center | Ventura | Government | 2 of 5 | 9 |
| Hoag Memorial Hospital Presbyterian | Newport Beach | Nonprofit | 5 of 5 | 3 |
| Community Memorial Hospital - Ventura | Ventura | Nonprofit | 4 of 5 | 2 |
| Adventist Health Ukiah Valley | Ukiah | Nonprofit | 4 of 5 | 2 |
| Loma Linda University Medical Center | Loma Linda | Nonprofit | 4 of 5 | 2 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Addiction Medicine (Family 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. Robert Calvert, D.O.Alpine, CA · No drug or device payments recorded (2025) ·
(619) 445-1188 Dr. Brian Talleur, MDAtascadero, CA · No drug or device payments recorded (2025) ·
(805) 461-5212 Dr. Erin Morris, MDBakersfield, CA · $46 in drug and device payments (2025) ·
(661) 326-2800 Dr. Kamron Hakhamimi, M.D.Burbank, CA · No drug or device payments recorded (2025) ·
(818) 561-4733 Dr. Peter Scheid, M.D.Capistrano Beach, CA · No drug or device payments recorded (2025) ·
(949) 629-4140 Dr. Gina Caravaglia, DOCathedral City, CA · No drug or device payments recorded (2025) ·
(760) 992-3473 Dr. Karen Antwiler, M.D.Cathedral City, CA · $350 in drug and device payments (2025) · Telehealth ·
(760) 773-4300 Dr. Nicole Marie BarcegaChula Vista, CA · No drug or device payments recorded (2025) ·
(619) 691-7587 Dr. Lucia Rusu, MDCosta Mesa, CA · No drug or device payments recorded (2025) ·
(714) 957-5000 Dr. Matthew Torrington, M.D.Culver City, CA · $152 in drug and device payments (2025) ·
(310) 425-2472 Dr. Kenneth Russ, M.D.Desert Hot Springs, CA · No drug or device payments recorded (2025) ·
(760) 329-2924 Dr. Lakai Banks-dean, MDEl Cajon, CA · $51 in drug and device payments (2025) · Telehealth ·
(619) 841-1310 Dr. Madhup Joshi, MDFort Bragg, CA · No drug or device payments recorded (2025) ·
(707) 961-4631 Dr. Jason Speaks, PHD, FNP-C, RNGalt, CA · No drug or device payments recorded (2025) ·
(209) 744-9909 Dr. Moses Nasser, D.O.Glendora, CA · No drug or device payments recorded (2025) ·
(909) 206-4188 Dr. Gary Jaeger, MDHarbor City, CA · No drug or device payments recorded (2025) ·
(310) 325-5111 Dr. Jothsna Bodhanapati, MD Dr. Eva Smith, M.D., M.P.H.Hoopa, CA · No drug or device payments recorded (2025) ·
(530) 625-4261 Dr. Richard Peprah, M.D.Huntington Beach, CA · No drug or device payments recorded (2025) ·
(949) 432-0918 Dr. Phillip Richards, M.D.Indian Wells, CA · No drug or device payments recorded (2025) ·
(760) 345-8904 Dr. Robert Jennings, M.D., FAAFP Dr. Loni Jay, MDJackson, CA · No drug or device payments recorded (2025) · Telehealth ·
(209) 257-5900 Dr. Anthony Ocana, MD, CCFP, FASAMLaguna Beach, CA · No drug or device payments recorded (2025) ·
(604) 803-8513 Dr. Stephen Groth, MDLaguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 306-7383 Dr. Jennifer Johnson, FNP-CLaguna Hills, CA · $7,004 in drug and device payments (2025) ·
(949) 829-2779 Dr. Kenneth Gheysar, M.D.Laguna Hills, CA · No drug or device payments recorded (2025) ·
(949) 306-2566 Dr. Linnea Smith, PA-CLaguna Hills, CA · No drug or device payments recorded (2025) ·
(949) 829-2779 Dr. Stephen Bradley, MDLakeport, CA · $158 in drug and device payments (2025) · Telehealth ·
(707) 263-5679 Dr. Joseph Chudy, M.D.Lodi, CA · No drug or device payments recorded (2025) ·
(209) 553-0798 Dr. Chinasa Onyemkpa, MDLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-7622 Dr. Daniel RistakianLoma Linda, CA · $178 in drug and device payments (2025) ·
(877) 558-6248 Dr. Joshua Siu, DOLoma Linda, CA · $136 in drug and device payments (2025) ·
(909) 558-6131 Dr. Ling Fung KongLoma Linda, CA · $59 in drug and device payments (2025) ·
(909) 558-4918 Dr. Marianne Aldridge, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(949) 295-9770 Dr. Mitchell Schoen, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 651-5809 Dr. Peter Lang, DOLoma Linda, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 558-4000 Dr. Samantha AyoubLoma Linda, CA · No drug or device payments recorded (2025) ·
(847) 989-1195 Dr. Sridevi KorandLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-6131 Dr. William Guthrie, MDLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-6641 Dr. Abraham Malkin, M.D.Los Angeles, CA · $99 in drug and device payments (2025) ·
(323) 207-0818 Dr. Alyssa Thomas, MDLos Angeles, CA · $25 in drug and device payments (2025) ·
(213) 727-6717 Dr. Daniel Radnia, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 985-4124 Dr. David Koroshec, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(213) 353-1140 Dr. Gigi Simmons, MDLos Angeles, CA · $56 in drug and device payments (2025) ·
(424) 338-1000 Dr. William Eidelman, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(323) 463-3295 Dr. Robert GardnerLucerne, CA · No drug or device payments recorded (2025) ·
(707) 274-9299 Dr. Susan Nylen, NFPManteca, CA · No drug or device payments recorded (2025) ·
(209) 825-7748 Dr. Myriam Aisha KaneMartinez, CA · No drug or device payments recorded (2025) ·
(925) 370-5300 Common questions
How many Addiction Medicine (Family Medicine) providers are in California?There are 129 Addiction Medicine (Family Medicine) providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Addiction Medicine (Family Medicine) providers in California offer telehealth?Yes. 19 of the 129 Addiction Medicine (Family Medicine) providers in California (about 15%) report offering telehealth services in CMS data.
Which cities in California have the most Addiction Medicine (Family Medicine) providers?Ventura (13), Loma Linda (10), Los Angeles (6) have the highest concentration of Addiction Medicine (Family Medicine) providers in California.
How many Addiction Medicine (Family Medicine) providers in California received drug or device company payments?56 of 129 Addiction Medicine (Family Medicine) providers in California (43%) 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.
Do most Addiction Medicine Doctors (Family Medicine) in California work in independent practices or large health systems?Among 62 Addiction Medicine Doctors (Family Medicine) in California enrolled in Medicare, 23% bill through a solo or small practice with fewer than 10 clinicians, 24% through a mid-size group of 10 to 99, and 53% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Addiction Medicine Doctors (Family Medicine) in California work at?According to CMS facility affiliation records, the California hospitals where the most Addiction Medicine Doctors (Family Medicine) hold privileges are Ventura County Medical Center in Ventura; Hoag Memorial Hospital Presbyterian in Newport Beach; Community Memorial Hospital - Ventura in Ventura.
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