Nuclear Medicine Doctors in California
Data updated monthly · Last refresh October 2026
150 Nuclear Medicine providers practice in California, including 13 (9%) offering telehealth. The largest concentration is in Los Angeles. 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.
150providers
13telehealth
Los Angelestop city
Nuclear Medicine by city in California
Choose a city to see providers there.
Where Nuclear Medicine Doctors in California practice
From CMS Medicare enrollment records covering 67 of the 150 providers listed here (45%). Providers who do not bill Medicare are not included in these figures.
12%solo or small practice (under 10 clinicians)
6%mid-size group (10 to 99)
82%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Nuclear Medicine Doctors | All clinicians in group | Main city |
| Southern California Permanente Medical Group | 13 | 11,250 | San Diego |
| Permanente Medical Group Inc. | 5 | 10,928 | Santa Clara |
| Sutter Valley Medical Foundation | 5 | 2,473 | Sacramento |
| The Regents of the University of California | 5 | 1,426 | Los Angeles |
| Regents of the University of California | 5 | 9 | Encino |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Nuclear Medicine Doctors affiliated |
| Ronald Reagan UCLA Medical Center | Los Angeles | Government | 4 of 5 | 6 |
| UCLA West Valley Medical Center | West Hills | For-profit | 2 of 5 | 5 |
| Sutter Roseville Medical Center | Roseville | Nonprofit | 5 of 5 | 4 |
| UC San Diego Health Hillcrest - Hillcrest Med Ctr | San Diego | Nonprofit | 5 of 5 | 4 |
| Stanford Health Care | Stanford | Nonprofit | 5 of 5 | 4 |
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.
Nuclear 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. Peter Phan, MDAliso Viejo, CA · $48 in drug and device payments (2025) ·
(949) 716-0949 Dr. Harinder Brar, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 324-4100 Dr. Narendra Raval, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. Nelson Arnstein, MDBellflower, CA · No drug or device payments recorded (2025) ·
(562) 461-3000 Dr. David Shames, M.D.Berkeley, CA · No drug or device payments recorded (2025) ·
(510) 841-6278 Dr. James Pritchard, M.D.Beverly Hills, CA · No drug or device payments recorded (2025) ·
(310) 278-0656 Dr. Ramona Tabib, M.D.Beverly Hills, CA · No drug or device payments recorded (2025) ·
(323) 379-5017 Dr. William Pace, MDCamarillo, CA · $31 in drug and device payments (2025) ·
(805) 971-1492 Dr. Gerald Main, M.D.Cambria, CA · No drug or device payments recorded (2025) ·
(805) 927-3713 Dr. Martin Winston, M.D.Carmichael, CA · No drug or device payments recorded (2025) ·
(916) 989-9044 Dr. Stephen Gerard, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 991-6685 Dr. Jin Cheung, MDDuarte, CA · No drug or device payments recorded (2025) ·
(800) 826-4673 Dr. Maria Parayno, M.D.Duarte, CA · No drug or device payments recorded (2025) ·
(626) 256-4673 Dr. Alison Taur, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Edwin Yeo, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Philip Shie, D.O.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-4602 Dr. Tushar Patel, M.D.Fountain Valley, CA · $172 in drug and device payments (2025) ·
(714) 957-0317 Dr. Judith Kalinyak, MD, PHDFremont, CA · No drug or device payments recorded (2025) ·
(510) 792-7276 Dr. Puneet Chandak, M.D.Fremont, CA · $196 in drug and device payments (2025) ·
(415) 595-8687 Dr. Sharon Dewit, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 409-2751 Dr. Mark Bernard, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 450-3109 Dr. Robert Cohen, MDGreenbrae, CA · No drug or device payments recorded (2025) ·
(415) 925-7174 Dr. Gelareh VahdatiIrvine, CA · No drug or device payments recorded (2025) ·
(310) 906-9595 Dr. Rajiv Tangri, D.O.Irvine, CA · No drug or device payments recorded (2025) ·
(949) 671-8000 Dr. Zaman Javaheri, M.D.Irvine, CA · No drug or device payments recorded (2025) ·
(949) 557-0285 Dr. Michael Kan, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 626-7275 Dr. Mythri Shankar, M.D.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 414-5156 Dr. Olga Lyass, M.D.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 949-5000 Dr. David Gentry, M.D.Loma Linda, CA · $34 in drug and device payments (2025) ·
(909) 558-4000 Dr. Amir Entezari, M.D.Long Beach, CA · No drug or device payments recorded (2025) ·
(949) 677-4790 Dr. William Brown, M.D.Long Beach, CA · No drug or device payments recorded (2025) ·
(562) 826-8000 Dr. Merlin Puterbaugh, M.D.Los Altos, CA · No drug or device payments recorded (2025) ·
(650) 941-7488 Dr. Amir Iravani Tabrizipour, MDLos Angeles, CA · $53,829 in drug and device payments (2025) · Telehealth ·
(310) 794-1005 Dr. Carol Marcus, PH.D., M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-9775 Dr. Christiaan Schiepers, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 983-1439 Dr. Daniel Silverman, MDLos Angeles, CA · $14 in drug and device payments (2025) · Telehealth ·
(310) 794-1005 Dr. David Winsor, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(213) 484-7991 Dr. Do Hee Kim, MDLos Angeles, CA · $76 in drug and device payments (2025) ·
(213) 675-8916 Dr. Eunkyung Park, MDLos Angeles, CA · $38 in drug and device payments (2025) ·
(310) 794-1005 Dr. Feraas Jabi, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(248) 462-2992 Dr. Gerd Ken HerrmannLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 794-1005 Dr. Gholam Berenji, M.D.Los Angeles, CA · $963 in drug and device payments (2025) ·
(310) 268-3583 Dr. Hossein Jadvar, M.D.Los Angeles, CA · $60,809 in drug and device payments (2025) ·
(323) 442-8541 Dr. Johannes Czernin, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 301-6800 Dr. Julie Hong, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 794-1005 Dr. Louise Thomson, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 423-8000 Dr. Mark Mandelkern, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 268-4395 Dr. Martin Allen-auerbach, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 794-1005 Dr. Mojtaba Olyaie, M.DLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 478-3711 Dr. Patrick Colletti, M.D.Los Angeles, CA · $38 in drug and device payments (2025) ·
(323) 442-8541 Common questions
How many Nuclear Medicine providers are in California?There are 150 Nuclear Medicine providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Nuclear Medicine providers in California offer telehealth?Yes. 13 of the 150 Nuclear Medicine providers in California (about 9%) report offering telehealth services in CMS data.
Which cities in California have the most Nuclear Medicine providers?Los Angeles (23), Sacramento (15), San Diego (12) have the highest concentration of Nuclear Medicine providers in California.
How many Nuclear Medicine providers in California received drug or device company payments?33 of 150 Nuclear Medicine providers in California (22%) 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 Nuclear Medicine Doctors in California work in independent practices or large health systems?Among 67 Nuclear Medicine Doctors in California enrolled in Medicare, 12% bill through a solo or small practice with fewer than 10 clinicians, 6% through a mid-size group of 10 to 99, and 82% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Nuclear Medicine Doctors in California work at?According to CMS facility affiliation records, the California hospitals where the most Nuclear Medicine Doctors hold privileges are Ronald Reagan UCLA Medical Center in Los Angeles; UCLA West Valley Medical Center in West Hills; Sutter Roseville Medical Center in Roseville.
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