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. Emmanuel Strategos, M.D.Bakersfield, CA · $717 in drug and device payments (2025) · Telehealth ·
(661) 654-0400 Dr. Enrique Deleon, PACBakersfield, CA · $2,633 in drug and device payments (2025) · Telehealth ·
(661) 326-1600 Dr. Erika Romanini, PACBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 326-1600 Dr. Esmail Nadjmabadi, M.D.Bakersfield, CA · $248 in drug and device payments (2025) ·
(661) 301-7519 Dr. Fakhruddin Hasta, M.D.Bakersfield, CA · $20 in drug and device payments (2025) ·
(661) 324-6970 Dr. Fehma Tufail, MDBakersfield, CA · No drug or device payments recorded (2025) · Telehealth ·
(661) 336-5300 Dr. Felicia Hasta, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 326-2000 Dr. Fernando Bravo, M.D.Bakersfield, CA · $28 in drug and device payments (2025) ·
(661) 327-4712 Dr. Florencio Pangilinan, MDBakersfield, CA · $217 in drug and device payments (2025) ·
(661) 322-7309 Dr. Francis Arenas, M.DBakersfield, CA · $617 in drug and device payments (2025) · Telehealth ·
(661) 777-7707 Dr. Geeta Bisht, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 327-4647 Dr. Geeteshwar Mangat, M.D.Bakersfield, CA · $545 in drug and device payments (2025) · Telehealth ·
(661) 840-2222 Dr. Gerard Halaska, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. Girmay Gebremedhin, MDBakersfield, CA · $28 in drug and device payments (2025) ·
(661) 327-5350 Dr. Glenn Goldis, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 327-4411 Dr. Graciela FaiadBakersfield, CA · No drug or device payments recorded (2025) ·
(909) 522-7223 Dr. Greti PetersenBakersfield, CA · $226 in drug and device payments (2025) ·
(183) 367-8278 Dr. Gurpal Singh, MDBakersfield, CA · $166 in drug and device payments (2025) · Telehealth ·
(661) 326-2200 Dr. Harjeet Singh, MDBakersfield, CA · $369 in drug and device payments (2025) ·
(661) 631-1591 Dr. Harsimran Gill, M.D.Bakersfield, CA · $286 in drug and device payments (2025) · Telehealth ·
(661) 654-0200 Dr. Hector De Jesus, M. D.Bakersfield, CA · $1,441 in drug and device payments (2025) · Telehealth ·
(661) 241-6700 Dr. Henry Chien, M.D.Bakersfield, CA · $16 in drug and device payments (2025) ·
(661) 772-5240 Dr. Hobart LaiBakersfield, CA · $151 in drug and device payments (2025) ·
(661) 326-2202 Dr. Hong Fa Yang, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 588-0687 Dr. Howard Nizar, M.D.Bakersfield, CA · $400 in drug and device payments (2025) · Telehealth ·
(661) 324-6593 Dr. Ileana Laguna, MDBakersfield, CA · $19 in drug and device payments (2025) ·
(833) 678-2781 Dr. Ingy Ayad, MDBakersfield, CA · $2,236 in drug and device payments (2025) · Telehealth ·
(661) 326-1600 Dr. Irene Spinello, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 326-2200 Dr. Ismail Patel, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 213-3218 Dr. Jacqueline Paul, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 322-3905 Dr. James Penrose, DOBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. Jan Trobisch, M.D.Bakersfield, CA · $236 in drug and device payments (2025) ·
(661) 878-9100 Dr. Jeffery Freesemann, MDBakersfield, CA · $12 in drug and device payments (2025) ·
(661) 323-2295 Dr. Jeffrey Chen, D.O.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 327-4411 Dr. Jennifer Abraham, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 324-4963 Dr. Jerome Lazaga, M.D.Bakersfield, CA · No drug or device payments recorded (2025) · Telehealth ·
(661) 334-2801 Dr. Jessy Jacob, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. Jimmy Sio, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. John Dickey, M.D.Bakersfield, CA · $354 in drug and device payments (2025) ·
(661) 869-6931 Dr. John Hewitt, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 327-2208 Dr. John Tran, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. Joseph Hayes, D.O.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 459-1900 Dr. Ju Hwan Lee, MDBakersfield, CA · $118 in drug and device payments (2025) ·
(661) 327-4411 Dr. June Salvo, D.O.Bakersfield, CA · $105 in drug and device payments (2025) · Telehealth ·
(661) 861-7938 Dr. Kaikei Cho, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 326-6616 Dr. Karim Merchant, MDBakersfield, CA · $74 in drug and device payments (2025) · Telehealth ·
(661) 326-2000 Dr. Karla Talavera, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 327-4647 Dr. Kasey Fox, DOBakersfield, CA · $242 in drug and device payments (2025) ·
(661) 326-2800 Dr. Katherine Thomas, MDBakersfield, CA · $20 in drug and device payments (2025) ·
(661) 327-5350 Dr. Kathleen Mayer, MDBakersfield, CA · $14 in drug and device payments (2025) ·
(617) 505-1520 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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