Internal Medicine Doctors in California
Data updated monthly · Last refresh October 2026
17,715 Internal Medicine providers practice in California, including 4,245 (24%) 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.
17,715providers
4,245telehealth
Los Angelestop city
Internal Medicine by city in California
Choose a city to see providers there.
Internal 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. Nikhil Gupta, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 831-6500 Dr. P. Gunanayagam, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 779-5000 Dr. Philip Joseph, MDAntioch, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 813-6500 Dr. Quoc Nguyen, DOAntioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Rennie Roque, MDAntioch, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 813-6500 Dr. Samina Rashid, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 779-5000 Dr. Samrah Zaigham, M.DAntioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Sara Wasserbauer, M.D.Antioch, CA · No drug or device payments recorded (2025) ·
(925) 779-7273 Dr. Sohrab Sidhu, MD, MPH, MSAntioch, CA · No drug or device payments recorded (2025) ·
(925) 532-2721 Dr. Stephen Foster, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Syed Qadri, MDAntioch, CA · $16 in drug and device payments (2025) · Telehealth ·
(925) 779-5000 Dr. Tak Yau, DOAntioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Terry Minn, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Than Than, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Triveni Abburi, M.D.Antioch, CA · No drug or device payments recorded (2025) ·
(925) 813-6500 Dr. Vickrum Chodri, MDAntioch, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 779-5000 Dr. Waldo Ferrer, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 779-5000 Dr. William Le, M.D.Antioch, CA · No drug or device payments recorded (2025) ·
(925) 295-4924 Dr. Yesha Shah, DOAntioch, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 429-9306 Dr. Yuru Song, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 779-5000 Dr. Zenen Alpuerto, MDAntioch, CA · No drug or device payments recorded (2025) ·
(707) 423-7342 Dr. Zhihong Zhong, MDAntioch, CA · $123 in drug and device payments (2025) · Telehealth ·
(925) 779-5000 Dr. Ajay Moganti, MDApple Valley, CA · No drug or device payments recorded (2025) ·
(760) 946-4233 Dr. Alden Jallorina, M.D.Apple Valley, CA · $1,099 in drug and device payments (2025) · Telehealth ·
(760) 946-2600 Dr. Ali Osman, MDApple Valley, CA · $130 in drug and device payments (2025) ·
(760) 946-4233 Dr. Andres Gavino De La Llana, MDApple Valley, CA · $316 in drug and device payments (2025) · Telehealth ·
(760) 241-6666 Dr. Anitha Bhat, MDApple Valley, CA · $255 in drug and device payments (2025) · Telehealth ·
(760) 247-0581 Dr. Asim Munawar, MDApple Valley, CA · No drug or device payments recorded (2025) ·
(760) 946-4233 Dr. Bhairavi Patel, MDApple Valley, CA · $1,104 in drug and device payments (2025) ·
(760) 810-7631 Dr. Bilal Memon, MDApple Valley, CA · No drug or device payments recorded (2025) ·
(760) 242-2311 Dr. Dawit Mamo, M.D.Apple Valley, CA · $15 in drug and device payments (2025) · Telehealth ·
(760) 242-4000 Dr. Divya Patel, MDApple Valley, CA · $506 in drug and device payments (2025) ·
(760) 963-7802 Dr. Gerald Radlauer, M.D.Apple Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(760) 242-5389 Dr. Haichi Lin, M.DApple Valley, CA · No drug or device payments recorded (2025) ·
(760) 242-2311 Dr. Hisham Abukamleh, MDApple Valley, CA · $787 in drug and device payments (2025) ·
(760) 515-4003 Dr. Katherine Alconcel, D.O.Apple Valley, CA · No drug or device payments recorded (2025) ·
(769) 946-4233 Dr. Lavina Lakdawala, M.D.Apple Valley, CA · $37 in drug and device payments (2025) ·
(760) 946-4233 Dr. Leonardo Moqattash, M.D.Apple Valley, CA · $170 in drug and device payments (2025) · Telehealth ·
(760) 906-9362 Dr. Mark Lauron, M.D.Apple Valley, CA · $377 in drug and device payments (2025) ·
(760) 242-3644 Dr. Meera Soni, M.D.Apple Valley, CA · $191 in drug and device payments (2025) · Telehealth ·
(760) 684-4610 Dr. Michael Norman, DOApple Valley, CA · $212 in drug and device payments (2025) ·
(760) 242-1222 Dr. Mohammadreza Samadani, M.D.Apple Valley, CA · No drug or device payments recorded (2025) ·
(760) 946-4233 Dr. Nyra Khetarpal, M.D.Apple Valley, CA · $732 in drug and device payments (2025) · Telehealth ·
(760) 242-9262 Dr. Ramesh Bambhania, M.D.Apple Valley, CA · $51 in drug and device payments (2025) · Telehealth ·
(760) 699-1110 Dr. Ram Kamath, M.D.Apple Valley, CA · $319 in drug and device payments (2025) · Telehealth ·
(760) 247-0581 Dr. Robert Boldy, M.D.Apple Valley, CA · No drug or device payments recorded (2025) ·
(760) 946-8169 Dr. Ruby Sia, MDApple Valley, CA · $1,003 in drug and device payments (2025) ·
(760) 946-3888 Dr. Sana Mulla, MDApple Valley, CA · No drug or device payments recorded (2025) ·
(760) 946-4233 Dr. Taleen Khalaf, M.D.Apple Valley, CA · $20 in drug and device payments (2025) ·
(760) 381-7703 Conditions Internal Medicine providers in California commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
Common questions
How many Internal Medicine providers are in California?There are 17,715 Internal Medicine providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Internal Medicine providers in California offer telehealth?Yes. 4,245 of the 17,715 Internal Medicine providers in California (about 24%) report offering telehealth services in CMS data.
Which cities in California have the most Internal Medicine providers?Los Angeles (1,417), San Francisco (1,322), San Diego (970) have the highest concentration of Internal Medicine providers in California.
How many Internal Medicine providers in California received drug or device company payments?5,614 of 17,715 Internal Medicine providers in California (32%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Internal Medicine providers in California treat?Internal Medicine providers commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management and related conditions. Individual practices vary, so confirm with the provider before booking.
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 Internal Medicine Doctors in California work in independent practices or large health systems?Among 10,847 Internal Medicine Doctors in California enrolled in Medicare, 20% bill through a solo or small practice with fewer than 10 clinicians, 12% through a mid-size group of 10 to 99, and 67% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Internal Medicine Doctors in California work at?According to CMS facility affiliation records, the California hospitals where the most Internal Medicine Doctors hold privileges are Stanford Health Care in Stanford; UCSF Medical Center in San Francisco; Ronald Reagan UCLA Medical Center in Los Angeles.
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