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. Kyle Glover, MDSanta Rosa, CA · $300 in drug and device payments (2025) · Telehealth ·
(707) 576-4000 Dr. Larry Marianella, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 526-4865 Dr. Laurent Palmatier, MBBSSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 992-5406 Dr. Lawrence Cooper, M.D.Santa Rosa, CA · $138 in drug and device payments (2025) · Telehealth ·
(707) 546-2180 Dr. Lawrence Lapsley, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Lilian Lao, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-4000 Dr. Lingjin MengSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 303-3600 Dr. Lois Johnson, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 522-1466 Dr. Loretta Zweig, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Lucy Oh, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Madhavi Vetsa, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) · Telehealth ·
(075) 665-8757 Dr. Mandeep Nagra, MB,BSSanta Rosa, CA · $128 in drug and device payments (2025) ·
(707) 570-3855 Dr. Marjorie Kelvin, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Marlon Decastro, M.D.Santa Rosa, CA · $339 in drug and device payments (2025) · Telehealth ·
(707) 303-8300 Dr. Martin Rubinger, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 526-0310 Dr. Maya Land, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 393-4044 Dr. Mohammad Khan, DOSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 393-4000 Dr. Monica Ferguson, MDSanta Rosa, CA · $152 in drug and device payments (2025) · Telehealth ·
(707) 303-8300 Dr. Naseer JameelSanta Rosa, CA · No drug or device payments recorded (2025) ·
(347) 635-3474 Dr. Navneet Attri, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 521-8841 Dr. Neil Levin, M.D.Santa Rosa, CA · $213 in drug and device payments (2025) · Telehealth ·
(707) 546-2180 Dr. Nhung Quach, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 393-4000 Dr. Nicholas Anton, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 544-3411 Dr. Parul Kohli, M.D.Santa Rosa, CA · $15 in drug and device payments (2025) ·
(707) 546-2180 Dr. Robert Schaefer, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 544-3411 Dr. Robert Stewart, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 546-2180 Dr. Roger NacouziSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 546-5675 Dr. Rohee Krishan, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-4000 Dr. Ron Kennedy, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-0100 Dr. Roxanna PourmirzaieSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-4000 Dr. Rumka Singh, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Sabina Hoque, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 569-2340 Dr. Sanyogeeta Bhaway, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 303-8307 Dr. Saverio Roberto, DOSanta Rosa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 526-3360 Dr. Scott Peterson, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 545-1700 Dr. Seena Davies, MDSanta Rosa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 393-4104 Dr. Sheldon Weiss, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 523-0250 Dr. Shelleen Denno, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 526-0465 Dr. Siddharth Hublikar, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 546-3210 Dr. Soheila Benrazavi, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 528-1616 Dr. Sonia Zaveri, D.O.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-4000 Dr. Stephen Sheerin, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 547-2222 Dr. Stuti Kulkarni, M.D.Santa Rosa, CA · $162 in drug and device payments (2025) ·
(707) 393-4000 Dr. Suhana Elamsenthil, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-4000 Dr. Sumandeep Kaur, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-3263 Dr. Tatiana KalitaSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 525-5300 Dr. Terry Woodard, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Thomas Crane, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 571-4000 Dr. Thomas Guyn, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 546-2180 Dr. Thomas Watson, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 576-4000 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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