Internal Medicine in Walnut Creek, California
Data updated monthly · Last refresh September 2026
184 Internal Medicine providers practice in Walnut Creek, and 26% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Walnut Creek
Listed alphabetically. 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. Gurvinder Singh, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(209) 483-8232 Dr. Han Kyo Chang, M.DWalnut Creek, CA · $96 in drug and device payments (2025) ·
(716) 418-4665 Dr. Helen Stacey, MDWalnut Creek, CA · $1,505 in drug and device payments (2025) ·
(925) 937-9984 Dr. Helge Johannessen, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Himanshu Bhuria, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Huu Nguyen, D.O.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 225-5837 Dr. Hyun Lee, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 295-4000 Dr. Irina Kolomey, D.O.Walnut Creek, CA · $406 in drug and device payments (2025) · Telehealth ·
(925) 363-3395 Dr. Janet Hahn, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 295-4000 Dr. Jason Kung, MDWalnut Creek, CA · $232 in drug and device payments (2025) ·
(925) 295-4000 Dr. Javier Deleon, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 933-1210 Dr. Jaya Francis, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Jeff Ortiz, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Jessica Clima, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9000 Dr. Jessica Tsuei, MDWalnut Creek, CA · $288 in drug and device payments (2025) · Telehealth ·
(925) 471-7200 Dr. Joel Acab, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 906-2040 Dr. John Zuorski, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 952-2888 Dr. Jonathan Frank, M.D.Walnut Creek, CA · $43 in drug and device payments (2025) ·
(925) 933-1210 Dr. Jonathan Nguyen, M.D.Walnut Creek, CA · $181 in drug and device payments (2025) · Telehealth ·
(925) 295-4000 Dr. Joseph Henry, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(510) 409-6511 Dr. Joseph Long, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Joshua Ho, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Joy Bloch, M.D.Walnut Creek, CA · $852 in drug and device payments (2025) · Telehealth ·
(925) 296-9720 Dr. Joy Catolico, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Kamal Ghei, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Kamini Giri, M.DWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-6344 Dr. Kapil Anand, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(407) 756-2150 Dr. Karen Spizer, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Kartik Krishnan, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 Dr. Khashayar Montazeri, M.D.Walnut Creek, CA · $239 in drug and device payments (2025) ·
(925) 947-3393 Dr. Komal Rishi, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-7644 Dr. Krystal Sood, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Lakshmi Sowjanya Mallela, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2040 Dr. Lavinia Herbei, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Lillian Tseng, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Linda Row, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Lisa Craig, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Lisa Woll, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Lonnie Bristow, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 933-2733 Dr. Loreta Kalish, M.D.Walnut Creek, CA · $793 in drug and device payments (2025) · Telehealth ·
(925) 939-1220 Dr. Maeve O'regan, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-0417 Dr. Mandakini Patel, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Margaret Hegg, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Mariel Bailey, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Mariel Muriel Pastrana, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Marilyn Steppe, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Mark Hlavac, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Martin Braker, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 937-4057 Dr. Marvi Rijhwani, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Maryam Safa, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Conditions Internal Medicine providers in Walnut Creek, 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 Walnut Creek, California?There are 184 Internal Medicine providers with active NPI records practicing in Walnut Creek, according to federal NPPES data refreshed monthly.
How many Internal Medicine providers in Walnut Creek received drug or device company payments?47 of 184 (26%) 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 Walnut Creek treat?Internal Medicine providers in Walnut Creek 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 records 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.
All specialties in Walnut Creek Internal Medicine across California
