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Infectious Disease Specialists in California

Data updated monthly · Last refresh October 2026

1,121 Infectious Disease providers practice in California, including 322 (29%) 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.

1,121providers
322telehealth
Los Angelestop city

Infectious Disease by city in California

Choose a city to see providers there.

Infectious Disease in Los Angeles145 providers
Infectious Disease in San Francisco108 providers
Infectious Disease in San Diego76 providers
Infectious Disease in Stanford58 providers
Infectious Disease in Sacramento56 providers
Infectious Disease in Torrance26 providers
Infectious Disease in Orange23 providers
Infectious Disease in Fresno20 providers
Infectious Disease in Loma Linda18 providers
Infectious Disease in Walnut Creek18 providers
Infectious Disease in Long Beach17 providers
Infectious Disease in Pasadena16 providers
Infectious Disease in Palo Alto15 providers
Infectious Disease in La Jolla15 providers
Infectious Disease in Santa Monica14 providers
Infectious Disease in San Jose14 providers
Infectious Disease in Oakland13 providers
Infectious Disease in Newport Beach13 providers
Infectious Disease in Bakersfield11 providers
Infectious Disease in Pomona10 providers
Infectious Disease in San Mateo9 providers
Infectious Disease in Santa Ana9 providers
Infectious Disease in Santa Barbara9 providers
Infectious Disease in Modesto8 providers

Infectious Disease 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. Ryan Knueppel, M.D.
Santa Clara, CA · No drug or device payments recorded (2025) · (408) 851-4460
Dr. Aran Nichol, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 423-4111
Dr. Charulata Ramaprasad, M.D.
Santa Cruz, CA · $55 in drug and device payments (2025) · Telehealth · (831) 475-8834
Dr. John Kaufmann, MD
Santa Cruz, CA · $60 in drug and device payments (2025) · Telehealth · (831) 475-8834
Dr. Nanette Mickiewicz, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 462-7512
Dr. Sunita Singh, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 475-8834
Dr. Taynet Febles, MD
Santa Cruz, CA · $64 in drug and device payments (2025) · Telehealth · (831) 458-5524
Dr. Thomas Deetz, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5820
Dr. Bryant Yang
Santa Monica, CA · $282 in drug and device payments (2025) · Telehealth · (310) 453-0419
Dr. Ellie Goldstein, M.D.
Santa Monica, CA · $7,109 in drug and device payments (2025) · (310) 315-1511
Dr. Hera Maryam
Santa Monica, CA · $80 in drug and device payments (2025) · (310) 481-4242
Dr. James Rau, M.D.
Santa Monica, CA · $30 in drug and device payments (2025) · (562) 420-9202
Dr. Jessica Fischer, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · Telehealth · (310) 481-4242
Dr. Joanna Schaenman, M.D., PH.D.
Santa Monica, CA · $701 in drug and device payments (2025) · Telehealth · (310) 319-4371
Dr. Linda Morton, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-5499
Dr. Lucy Ngoc Tran, MD
Santa Monica, CA · $405 in drug and device payments (2025) · (310) 481-4242
Dr. Melvin Scheer, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 656-1700
Dr. Michelle Yousefzadeh, DO
Santa Monica, CA · $120 in drug and device payments (2025) · Telehealth · (310) 453-0419
Dr. Patricia Murray, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-5440
Dr. Robert Winters, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (818) 817-9832
Dr. Scott Layne, M.D
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 453-1324
Dr. Stanton Axline, M.D.
Santa Monica, CA · $125 in drug and device payments (2025) · (310) 829-0919
Dr. Andrew Desruisseau, M.D.
Santa Rosa, CA · $15 in drug and device payments (2025) · Telehealth · (707) 303-3600
Dr. David Sidney, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 525-8296
Dr. Frederick Drach, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 303-8309
Dr. Gary Green, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · Telehealth · (707) 573-5234
Dr. Shu Yang, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 525-8229
Dr. Tiffany Ngai, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · Telehealth · (707) 547-5437
Dr. Ye Thu
Santa Rosa, CA · No drug or device payments recorded (2025) · Telehealth · (707) 890-4250
Dr. Katherine Trintchouk, MD
Santee, CA · No drug or device payments recorded (2025) · (619) 596-5500
Dr. Andrea Polesky, MD
San Ysidro, CA · No drug or device payments recorded (2025) · (619) 662-4100
Dr. Fernando Dominguez, MD
San Ysidro, CA · $519 in drug and device payments (2025) · (619) 662-4100
Dr. Erika Steffe, MD
Sebastopol, CA · No drug or device payments recorded (2025) · (707) 364-1475
Dr. Karen Holbrook, MD, MPH
Sebastopol, CA · $32 in drug and device payments (2025) · (707) 889-9649
Dr. Elizabeth Maslow, M.D.
Shadow Hills, CA · $284 in drug and device payments (2025) · (818) 653-1137
Dr. Jerrold Dreyer, M.D.
Sherman Oaks, CA · No drug or device payments recorded (2025) · Telehealth · (818) 784-3615
Dr. Peter Miao, M.D.
Sherman Oaks, CA · No drug or device payments recorded (2025) · (818) 784-5300
Dr. Malini Soogoor, M.D.,
Simi Valley, CA · $222 in drug and device payments (2025) · Telehealth · (805) 520-1191
Dr. Dana Clutter, M.D.
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2100
Dr. Jamila Champsi, MD
South San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (650) 742-2000
Dr. Ronald Tempesta, MD
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2000
Dr. Aarthi Chary, M.D.
Stanford, CA · $23 in drug and device payments (2025) · (650) 723-6661
Dr. Akanksha Vaidya, MD
Stanford, CA · No drug or device payments recorded (2025) · (650) 723-4000
Dr. Alex Zimmet, MD
Stanford, CA · No drug or device payments recorded (2025) · Telehealth · (650) 723-4000
Dr. Amy Chang, MD
Stanford, CA · $44 in drug and device payments (2025) · Telehealth · (650) 723-4000
Dr. Andrew Nevins, MD
Stanford, CA · No drug or device payments recorded (2025) · Telehealth · (650) 723-4000
Dr. Andrew Zolopa, M.D.
Stanford, CA · No drug or device payments recorded (2025) · (650) 723-4000
Dr. Anthony Lieu, MD
Stanford, CA · No drug or device payments recorded (2025) · (650) 723-7912
Dr. Aruna Subramanian, M.D.
Stanford, CA · No drug or device payments recorded (2025) · Telehealth · (650) 723-4000
Dr. Arya Khosravi, MD
Stanford, CA · No drug or device payments recorded (2025) · (650) 723-4000

Conditions Infectious Disease providers in California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Infectious Disease providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Infectious Disease providers are in California?

There are 1,121 Infectious Disease providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Infectious Disease providers in California offer telehealth?

Yes. 322 of the 1,121 Infectious Disease providers in California (about 29%) report offering telehealth services in CMS data.

Which cities in California have the most Infectious Disease providers?

Los Angeles (145), San Francisco (108), San Diego (76) have the highest concentration of Infectious Disease providers in California.

How many Infectious Disease providers in California received drug or device company payments?

419 of 1,121 Infectious Disease providers in California (37%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Infectious Disease providers in California treat?

Infectious Disease providers commonly treat long COVID, HIV care, Lyme disease, recurrent infections, travel medicine 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 Infectious Disease Specialists in California work in independent practices or large health systems?

Among 717 Infectious Disease Specialists in California enrolled in Medicare, 26% bill through a solo or small practice with fewer than 10 clinicians, 7% through a mid-size group of 10 to 99, and 68% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Infectious Disease Specialists in California work at?

According to CMS facility affiliation records, the California hospitals where the most Infectious Disease Specialists hold privileges are Stanford Health Care in Stanford; UCSF Medical Center in San Francisco; Ronald Reagan UCLA Medical Center in Los Angeles.

Related reading on HealthcareDiscovery.AI

Infectious Disease in all 50 states Search all 1,121 in the directory Ask Zach for help choosing

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Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Infectious Disease in California? Get featured.