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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 in Los Angeles1,417 providers
Internal Medicine in San Francisco1,322 providers
Internal Medicine in San Diego970 providers
Internal Medicine in Sacramento602 providers
Internal Medicine in Oakland434 providers
Internal Medicine in San Jose433 providers
Internal Medicine in Stanford383 providers
Internal Medicine in Fresno339 providers
Internal Medicine in Torrance230 providers
Internal Medicine in Long Beach225 providers
Internal Medicine in Bakersfield210 providers
Internal Medicine in Loma Linda209 providers
Internal Medicine in Palo Alto189 providers
Internal Medicine in Anaheim188 providers
Internal Medicine in Orange188 providers
Internal Medicine in Riverside188 providers
Internal Medicine in Walnut Creek184 providers
Internal Medicine in Santa Monica170 providers
Internal Medicine in La Jolla161 providers
Internal Medicine in Roseville159 providers
Internal Medicine in Irvine155 providers
Internal Medicine in Beverly Hills152 providers
Internal Medicine in Santa Clara142 providers
Internal Medicine in Pasadena138 providers

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. Punitha Sooriyakumaran, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4545
Dr. Qingzheng Chen, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4845
Dr. Rabia Aslam
San Jose, CA · $26 in drug and device payments (2025) · Telehealth · (408) 490-4710
Dr. Radhika Yarlagadda, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-3126
Dr. Rafia Parveen, M.D.,
San Jose, CA · $160 in drug and device payments (2025) · Telehealth · (408) 929-0234
Dr. Randall Spencer, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 281-0708
Dr. Rand Barnard, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 686-2210
Dr. Raymond Chan, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Raymond Tabibiazar, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (415) 671-5674
Dr. Rebecca Guarino, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 293-7767
Dr. Reddy Pathakota
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-3000
Dr. Reena Bhargava, MD
San Jose, CA · $290 in drug and device payments (2025) · (408) 972-7000
Dr. Rekha Dharmaji, M.D
San Jose, CA · No drug or device payments recorded (2025) · (408) 627-2063
Dr. Richard Buxton, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Richard Cathey, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 254-2107
Dr. Richard Ornelas
San Jose, CA · $27 in drug and device payments (2025) · Telehealth · (408) 866-4000
Dr. Ritu Dabas, MD
San Jose, CA · No drug or device payments recorded (2025) · (562) 677-2414
Dr. Robert Chapnick, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-6900
Dr. Robert Horowitz, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 494-7422
Dr. Robert Lemons, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 363-3000
Dr. Roeliza Pascua, M.D.
San Jose, CA · $29 in drug and device payments (2025) · Telehealth · (408) 278-3003
Dr. Rohini Ashok, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Roni Zeiger, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Rosalinda Mandreza, MD
San Jose, CA · $3,792 in drug and device payments (2025) · (408) 274-2880
Dr. Rose Palma, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 251-3364
Dr. Rowena Murthy, M.D.
San Jose, CA · $265 in drug and device payments (2025) · Telehealth · (408) 871-3400
Dr. Rubiya Kausar, M.D.
San Jose, CA · $73 in drug and device payments (2025) · Telehealth · (408) 871-3400
Dr. Ruta Wakharkar, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 278-3003
Dr. Sabiha Vyas, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Sakara Seng, D.O.
San Jose, CA · $254 in drug and device payments (2025) · (209) 985-5624
Dr. Saman Sabounchi, M.D
San Jose, CA · No drug or device payments recorded (2025) · (832) 618-8479
Dr. Sameh Mohamed
San Jose, CA · No drug or device payments recorded (2025) · (917) 376-2132
Dr. Samuel Cipoletti, M.D
San Jose, CA · No drug or device payments recorded (2025) · (408) 281-2772
Dr. Sanaz Abbasialaei
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 523-3620
Dr. Sangeeta Joshi, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Sanjay Agarwal, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 808-5200
Dr. Sanjay Kurani, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-6305
Dr. San San Myint, MD
San Jose, CA · $63 in drug and device payments (2025) · (408) 621-1536
Dr. Santhi Lingamneni, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4673
Dr. Sarah Cody, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4214
Dr. Sarah Gmach, MD, MPH
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-7724
Dr. Sara Pinkel, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Saurabh Prakash, MD, PHD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5111
Dr. Scott Klein, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 254-6513
Dr. Scott Wong, DO
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Sean Kanakaraj, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Shabnam Husain, M.D.
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 871-3400
Dr. Shahe Komshian, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 871-3400
Dr. Shailender Singh, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 550-4259
Dr. Shallu Singh, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 223-7035

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.

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

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Internal Medicine in California? Get featured.