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. Ali-reza Barmaki, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Amrita Dhaliwal, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Amy Clouse, MDWalnut Creek, CA · $28 in drug and device payments (2025) ·
(925) 947-3393 Dr. Andrea Lim, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Andrew Chang, MDWalnut Creek, CA · $43 in drug and device payments (2025) · Telehealth ·
(925) 295-4000 Dr. Andrew Leavitt, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Anish Patel, M.D.Walnut Creek, CA · $26 in drug and device payments (2025) ·
(925) 295-4000 Dr. Anita Patel, MDWalnut Creek, CA · $81 in drug and device payments (2025) ·
(925) 952-2888 Dr. Anne Gartner, DOWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 352-8720 Dr. Anthony Arroyo, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Anthony Bernens, MDWalnut Creek, CA · $288 in drug and device payments (2025) · Telehealth ·
(925) 952-5545 Dr. Anusha Bakshi, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 Dr. Ari Katz, M.D.Walnut Creek, CA · $45 in drug and device payments (2025) ·
(925) 296-9228 Dr. Aysha Ayub, DOWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 737-3798 Dr. Baldomero De Leon, M.D.Walnut Creek, CA · $560 in drug and device payments (2025) ·
(925) 932-1018 Dr. Barry Rotman, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9228 Dr. Bibanjeet Virk, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Brian O'connor, M.D., MPHWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 Dr. Calvin Deng, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 906-2000 Dr. Celso Taborga, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 946-1080 Dr. Chanda Banwat, M.D.Walnut Creek, CA · $954 in drug and device payments (2025) · Telehealth ·
(925) 296-9730 Dr. Charles Fang, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 295-4000 Dr. Christian Balzer, M.D.Walnut Creek, CA · $23 in drug and device payments (2025) ·
(925) 947-3393 Dr. Chun Ouyang, M.D., PH.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4020 Dr. Colleen Landry, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Dale Grahn, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Daniel Young, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. David Clemons, MDWalnut Creek, CA · $591 in drug and device payments (2025) · Telehealth ·
(925) 296-9756 Dr. David NathansonWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 906-2000 Dr. Deborah Arce, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 952-2739 Dr. Deborah Doberne, MDWalnut Creek, CA · $42 in drug and device payments (2025) ·
(925) 295-4000 Dr. Delia Salgado-lejano, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 952-2888 Dr. Devorah Ben-zeev, M.D.Walnut Creek, CA · $680 in drug and device payments (2025) · Telehealth ·
(925) 296-9720 Dr. Douglas Zlock, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9740 Dr. Ebunoluwa Oshinuga-atere, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Elaine Le, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Elise Hughes-watkins, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9740 Dr. Elizabeth Seet, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 933-1210 Dr. Emily Nock, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Epifanio Deleon, M.D.Walnut Creek, CA · $125 in drug and device payments (2025) ·
(925) 933-1210 Dr. Evonne Tsou, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Fausan Tsai, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4050 Dr. Fazlollah Kasravi, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Francis Nepacena, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. George Slater, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Gisha Kattady, M.D.Walnut Creek, CA · $256 in drug and device payments (2025) · Telehealth ·
(925) 296-7490 Dr. Gretchen Kunitz, MDWalnut Creek, CA · $94 in drug and device payments (2025) · Telehealth ·
(925) 947-0417 Dr. Grishma Patel, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-0417 Dr. Gurinder Singh, D.O.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Gurveen Chahal, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 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