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. Margaret Ford, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(000) 000-0000 Dr. Marilena Sandru, M.D.Pleasanton, CA · No drug or device payments recorded (2025) ·
(925) 416-6767 Dr. Mary Ann Tancuan, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Michael Louie, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 847-5000 Dr. Muniza Muzaffar, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 847-5000 Dr. Nalini Rajagopal, M.D.Pleasanton, CA · No drug or device payments recorded (2025) ·
(925) 462-1755 Dr. Namrata Sidhu, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 847-5000 Dr. Nikhil Apte, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 463-0590 Dr. Pankaj Vij, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 847-5000 Dr. Parvathi Banda, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Pura San Valentin, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Rama Narasimhan, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Robert Santos, M.D.Pleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 460-8478 Dr. Saba Lahsaei, M.D.Pleasanton, CA · $2,486 in drug and device payments (2025) · Telehealth ·
(760) 859-7608 Dr. Sampath Ramakrishnan, M.D.Pleasanton, CA · No drug or device payments recorded (2025) ·
(925) 519-0409 Dr. Semina Hajra, M.DPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 433-3594 Dr. Smrutirekha Misra, M.D.Pleasanton, CA · $533 in drug and device payments (2025) · Telehealth ·
(925) 224-0720 Dr. Solomon Park, MD MPHPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5100 Dr. Somalwar Shailaja Reddy, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5234 Dr. Soo Rhee, M.D.Pleasanton, CA · No drug or device payments recorded (2025) ·
(925) 224-0720 Dr. Stanley Ng, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 463-0590 Dr. Surekha Urva, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Swapna Kamireddy, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-3000 Dr. Tasneem Bader-omarali, M.D.Pleasanton, CA · $168 in drug and device payments (2025) ·
(925) 417-7505 Dr. Upama BaruaPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 462-1755 Dr. Vandana Boparai, MDPleasanton, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 416-6767 Dr. Vasantha Ravishankar, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Vijay Bhat, M.D.Pleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5100 Dr. W. Curtis Javorski, MDPleasanton, CA · No drug or device payments recorded (2025) ·
(925) 847-5000 Dr. Thomas Dougan, MDPlumas Lake, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 772-5801 Dr. Akhenaton Pappoe, M.DPomona, CA · $85 in drug and device payments (2025) · Telehealth ·
(909) 623-1561 Dr. Alberto Degiovanni, MDPomona, CA · $33 in drug and device payments (2025) · Telehealth ·
(909) 865-9500 Dr. Andrew Pak, MDPomona, CA · No drug or device payments recorded (2025) ·
(855) 252-7223 Dr. Chan Aung, M.D.Pomona, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 447-8585 Dr. David Hall, D.O.Pomona, CA · No drug or device payments recorded (2025) ·
(909) 865-9500 Dr. David Sapien, M.D.Pomona, CA · No drug or device payments recorded (2025) ·
(909) 620-5502 Dr. Geeta Patwa, MDPomona, CA · No drug or device payments recorded (2025) ·
(909) 447-8585 Dr. Gimha Gunawardana, M.D Dr. Jagtar Dhadwal, MDPomona, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 868-6800 Dr. Joanne Koo, MDPomona, CA · No drug or device payments recorded (2025) ·
(909) 595-1221 Dr. Kenneth Brown, MDPomona, CA · No drug or device payments recorded (2025) ·
(909) 620-4373 Dr. Kevin Gamage, M.D.Pomona, CA · No drug or device payments recorded (2025) ·
(909) 596-0788 Dr. Mallu Reddy, MDPomona, CA · $2,682 in drug and device payments (2025) · Telehealth ·
(909) 623-4050 Dr. Manjusha Gupta, MDPomona, CA · No drug or device payments recorded (2025) ·
(909) 865-0676 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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