HealthcareDiscovery.AI / Doctors / California / Internal Medicine

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. Shally Garg, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Sharleen Mulliken, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 371-4714
Dr. Simi Davu, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 729-2800
Dr. Simi Sharma
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Sofia Kantor, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Sofiia Sampara
San Jose, CA · No drug or device payments recorded (2025) · (408) 362-4791
Dr. Songqian Li, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5611
Dr. Sonia Jahan, MD
San Jose, CA · No drug or device payments recorded (2025) · (888) 334-1000
Dr. Sonia Sadarangani, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 729-9700
Dr. Sony Haris, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Sreepriya Gopalkrishnan, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 918-2600
Dr. Srijana Davuluri, M.B.B.S
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Stephanie Chan, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-7742
Dr. Stephen Mckenna, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-6300
Dr. Steven Nemirov
San Jose, CA · $214 in drug and device payments (2025) · Telehealth · (408) 297-7909
Dr. Steven Yuen, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Steve Yoshioka, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Sudha Karupaiah, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 279-1400
Dr. Sudha Saduvala
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 445-4020
Dr. Suma Datla
San Jose, CA · $22 in drug and device payments (2025) · (408) 947-2500
Dr. Sunitha Gubbala, M.D.
San Jose, CA · $24 in drug and device payments (2025) · Telehealth · (408) 371-9010
Dr. Susan Campbell, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 445-3400
Dr. Susan Zhao, MD
San Jose, CA · $137 in drug and device payments (2025) · Telehealth · (408) 885-4381
Dr. Susmitha Daggubati, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-3000
Dr. Suzanne Yokoyama, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Swaroopa Bussa, MD
San Jose, CA · $147 in drug and device payments (2025) · (408) 836-5955
Dr. Sweetheart Ador-dionisio, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 362-4740
Dr. Swetha Bhat, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 445-4020
Dr. Syed Majid, MD, FRCP, FASAM
San Jose, CA · No drug or device payments recorded (2025) · (408) 937-9002
Dr. Sylvia Cardounell, MD
San Jose, CA · No drug or device payments recorded (2025) · (917) 548-3758
Dr. Tammy Sirich, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Tam Nguyen, D.O.
San Jose, CA · $1,828 in drug and device payments (2025) · (408) 258-5083
Dr. Tana Nicole Ramos, MD
San Jose, CA · No drug or device payments recorded (2025) · (808) 228-4434
Dr. Tanvi Raman, M.D.
San Jose, CA · $193 in drug and device payments (2025) · Telehealth · (408) 384-7160
Dr. Tatiana Ososkova, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 712-2079
Dr. Teresita Guanzon, MD
San Jose, CA · $2,113 in drug and device payments (2025) · (408) 272-3041
Dr. Teri Pham, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Thai Vo, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Thang Tran, MD
San Jose, CA · $1,147 in drug and device payments (2025) · Telehealth · (408) 223-8818
Dr. Thinh Nguyen, M.D.
San Jose, CA · $1,278 in drug and device payments (2025) · (408) 223-0505
Dr. Thirupathi Reddy, MD
San Jose, CA · $5,041 in drug and device payments (2025) · (408) 272-1600
Dr. Thomas Caradonna, M.D.
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 362-4791
Dr. Thomas Mcguire, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 292-2552
Dr. Thomas Ormiston, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-7744
Dr. Thuyvy Le, DO
San Jose, CA · $1,668 in drug and device payments (2025) · Telehealth · (408) 440-4681
Dr. Tien Trinh, M.D.
San Jose, CA · $35 in drug and device payments (2025) · Telehealth · (408) 809-7533
Dr. Tiffany Guo, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (888) 334-1000
Dr. Timothy Lockyer, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Timothy Ong, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Tina Sugimoto, MD
San Jose, CA · $434 in drug and device payments (2025) · Telehealth · (408) 366-0595

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

Related

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.