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. James Sperber, M.D.San Clemente, CA · No drug or device payments recorded (2025) ·
(949) 542-8865 Dr. Karen Garner, MDSan Clemente, CA · $187 in drug and device payments (2025) · Telehealth ·
(949) 364-5600 Dr. Kenneth Rexinger, M.D.San Clemente, CA · $858 in drug and device payments (2025) · Telehealth ·
(949) 364-5600 Dr. Lawrence Chang, M.D.San Clemente, CA · $269 in drug and device payments (2025) · Telehealth ·
(949) 240-9664 Dr. Mahtab Naji, MDSan Clemente, CA · $150 in drug and device payments (2025) · Telehealth ·
(949) 542-8865 Dr. Nick Karahalios, MDSan Clemente, CA · $18 in drug and device payments (2025) · Telehealth ·
(949) 487-9034 Dr. Ronald Saltzman, MDSan Clemente, CA · No drug or device payments recorded (2025) ·
(949) 661-7562 Dr. Seema Khan, M.DSan Clemente, CA · No drug or device payments recorded (2025) ·
(949) 542-7700 Dr. Simon Outhwaite, MDSan Clemente, CA · No drug or device payments recorded (2025) ·
(949) 493-6958 Dr. Steven Cullen, MDSan Clemente, CA · $18 in drug and device payments (2025) · Telehealth ·
(949) 487-9034 Dr. Theodore Van Dam, M.D.San Clemente, CA · No drug or device payments recorded (2025) ·
(949) 240-6772 Dr. Torsten Kruse, M.D.San Clemente, CA · $535 in drug and device payments (2025) · Telehealth ·
(949) 364-5600 Dr. Yelena Wood, M.D.San Clemente, CA · No drug or device payments recorded (2025) · Telehealth ·
(949) 453-4343 Dr. Aaron Venable, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(619) 532-7504 Dr. Abigail Mackenzie, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(000) 000-0000 Dr. Abiola Babawale, DOSan Diego, CA · $850 in drug and device payments (2025) ·
(619) 532-7400 Dr. Abraham Eskenazi, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(619) 339-1866 Dr. Abraham Lopez, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(619) 723-1355 Dr. Adam Haley, DOSan Diego, CA · No drug or device payments recorded (2025) ·
(619) 532-5990 Dr. Adam Lundy, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(858) 939-3400 Dr. Adam Pacal, M.D.San Diego, CA · No drug or device payments recorded (2025) · Telehealth ·
(800) 926-8273 Dr. Adam Zweig, MDSan Diego, CA · $68,749 in drug and device payments (2025) · Telehealth ·
(619) 516-8931 Dr. Adla Tessier, M.D.San Diego, CA · $862 in drug and device payments (2025) ·
(619) 255-9155 Dr. Adonis Saremi, M.D.San Diego, CA · $29 in drug and device payments (2025) ·
(714) 336-1246 Dr. Adria Jimenez Bacardi, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(800) 926-8273 Dr. Adrian Dollarhide, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(858) 552-8585 Dr. Ahmad Kabakibi, MDSan Diego, CA · $319 in drug and device payments (2025) ·
(619) 583-1954 Dr. Aileen Afshar, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(589) 393-4008 Dr. Ai Quach, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(619) 641-4300 Dr. Aireen Gutierrez, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(858) 573-9902 Dr. Akash Parida, DOSan Diego, CA · No drug or device payments recorded (2025) ·
(858) 776-8235 Dr. Alana Dembitsky, MDSan Diego, CA · No drug or device payments recorded (2025) · Telehealth ·
(858) 499-2710 Dr. Albert Lai, M.D.San Diego, CA · $84 in drug and device payments (2025) · Telehealth ·
(800) 290-5000 Dr. Alberto Godinez, MDSan Diego, CA · $84 in drug and device payments (2025) ·
(619) 662-4100 Dr. Alexander AgelidisSan Diego, CA · $345 in drug and device payments (2025) ·
(800) 926-8273 Dr. Alexander Bullen, M.D.San Diego, CA · $20 in drug and device payments (2025) · Telehealth ·
(619) 543-4619 Dr. Alexandra Sykes, MDSan Diego, CA · $25 in drug and device payments (2025) ·
(619) 543-6268 Dr. Alex Chan, DOSan Diego, CA · No drug or device payments recorded (2025) ·
(619) 366-4592 Dr. Alex Mercandetti, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(619) 291-9285 Dr. Alex Minter, M.D.San Diego, CA · $880 in drug and device payments (2025) ·
(619) 532-6881 Dr. Alfredo Alcausin, MDSan Diego, CA · No drug or device payments recorded (2025) · Telehealth ·
(833) 574-2273 Dr. Alfredo Quinonez, MDSan Diego, CA · $3,296 in drug and device payments (2025) · Telehealth ·
(619) 239-9675 Dr. Alicia Benjamin, M.D.San Diego, CA · $348 in drug and device payments (2025) · Telehealth ·
(858) 499-2600 Dr. Ali Parand, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(858) 552-8585 Dr. Alison CrispSan Diego, CA · $98 in drug and device payments (2025) ·
(619) 543-6268 Dr. Alison Lewis, M.D.San Diego, CA · $29 in drug and device payments (2025) ·
(619) 515-2445 Dr. Alissa Gilles, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(619) 278-3300 Dr. Alma Harb, MDSan Diego, CA · $67 in drug and device payments (2025) · Telehealth ·
(858) 249-6751 Dr. Amanda Crawford, MDSan Diego, CA · No drug or device payments recorded (2025) · Telehealth ·
(800) 926-8273 Dr. Amanda Lam, M.DSan Diego, CA · No drug or device payments recorded (2025) ·
(619) 543-1849 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.
Related reading on HealthcareDiscovery.AI
Internal Medicine in all 50 states Search all 17,715 in the directory Ask Zach for help choosing
Related
