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. Patrick Mulroy, D.O.Orange, CA · No drug or device payments recorded (2025) ·
(714) 456-8888 Dr. Paul Matthew Cabugao, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-5691 Dr. Philip Wong, MDOrange, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 456-8068 Dr. Pravin Sharma, M.D.Orange, CA · $1,426 in drug and device payments (2025) ·
(714) 771-2800 Dr. Priya Shah, M.D.Orange, CA · $1,944 in drug and device payments (2025) · Telehealth ·
(714) 771-5700 Dr. Punit Bavishi, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 456-8888 Dr. Quyen Ngo-metzger, MD Dr. Rachael WongOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-5691 Dr. Rajsree Nambudripad, MD Dr. Ralph Cygan, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-8068 Dr. Ramy Sidhom, M.D.Orange, CA · $3,000 in drug and device payments (2025) ·
(714) 456-8874 Dr. Randolph Tingle, DOOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-7890 Dr. Ray Quy, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-5691 Dr. Reema PatelOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-7890 Dr. Richard Khanal, MDOrange, CA · No drug or device payments recorded (2025) ·
(949) 515-5210 Dr. Roderick Eguilos, DOOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-7890 Dr. Romilla Batra, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-8068 Dr. Ronald Daoud, M.D.Orange, CA · $2,854 in drug and device payments (2025) · Telehealth ·
(707) 339-8802 Dr. Rowis Sous, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-7890 Dr. Roy Herndon, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 835-6042 Dr. Ruby Chien, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-5691 Dr. Saeed Zanjani, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 637-4485 Dr. Sai ShahOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-5691 Dr. Sandy HannaOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-7890 Dr. Sanjay Reddy, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-8068 Dr. San Lee, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 639-9401 Dr. Sarah Stanowicz, M.D. Dr. Sasan Salmi, M.D.Orange, CA · $873 in drug and device payments (2025) · Telehealth ·
(714) 285-2311 Dr. Seogeun HongOrange, CA · $2,293 in drug and device payments (2025) · Telehealth ·
(714) 361-6600 Dr. Shahab Zahed, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 733-1333 Dr. Shahroze Ranjha, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-7890 Dr. Shane SheahanOrange, CA · No drug or device payments recorded (2025) · Telehealth ·
(419) 205-3144 Dr. Shilpa Deshmukh, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(949) 645-0000 Dr. Shirin Majdizadeh, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 771-8177 Dr. Simin Torabzadeh, MDOrange, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 456-8978 Dr. Sonia R Sehgal, MDOrange, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 456-8978 Dr. Sonja Abbassi, M.D.Orange, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 628-3345 Dr. Sophocles N Panagon, MDOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-8978 Dr. Spencer GibsonOrange, CA · No drug or device payments recorded (2025) ·
(714) 456-5691 Dr. Suma Srinath, M.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 335-9968 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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