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Healthcare Providers in California

Find doctors, hospitals, and clinics in California from the official NPPES NPI Registry. We found 200 providers in this listing.

200 Providers Found Data from NPPES NPI Registry Updated 2026
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All Providers Doctors Hospitals & Clinics
Showing 181–195 of 200 providers
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Individual (NPI-1) Active

CHRISTOPHER CHARLES CLAYDON M.D.

Family Medicine, Geriatric Medicine

📍150 CATHERINE LN, GRASS VALLEY, CA, 95945

📞 530-271-2100

NPI: 1518965235

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Individual (NPI-1) Active

BRIAN TAYLOR CLIFFORD M.D.

Internal Medicine, Geriatric Medicine

📍10666 N TORREY PINES RD, LA JOLLA, CA, 92037

📞 858-554-3200

NPI: 1326450263

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Individual (NPI-1) Active

HARVEY DONALD COHEN MD

Internal Medicine, Geriatric Medicine

📍8330 RED OAK ST STE 201, RANCHO CUCAMONGA, CA, 91730

📞 909-987-2528

NPI: 1972517423

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Individual (NPI-1) Active

SILVIA COLLAZO DO

Family Medicine, Geriatric Medicine

📍1700 CESAR CHAVEZ AVE STE 3300, LOS ANGELES, CA, 90033

📞 323-264-4114

NPI: 1083771224

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Individual (NPI-1) Active

REBECCA E. CONANT M.D.

Internal Medicine, Geriatric Medicine

📍3333 CALIFORNIA ST, # 380, SAN FRANCISCO, CA, 94143

📞 415-514-3577

NPI: 1083656656

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Individual (NPI-1) Active

ERIN ATKINSON COOK M.D.

Internal Medicine

📍200 UCLA MEDICAL PLZ, LOS ANGELES, CA, 90095

📞 310-206-8272

NPI: 1558504381

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Individual (NPI-1) Active

STEPHANIE ANN CORDONNIER MD

Internal Medicine, Geriatric Medicine

📍3575 GEARY BLVD FL 1, SAN FRANCISCO, CA, 94118

📞 415-353-4900

NPI: 1588230809

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Individual (NPI-1) Active

ANDREW PHILIP CORR MD

Internal Medicine

📍7117 BROCKTON AVE, RIVERSIDE, CA, 92506

📞 951-782-3613

NPI: 1619958089

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Individual (NPI-1) Active

JOHN STANTON COSTELLO MD

Hospitalist

📍10666 N TORREY PINES RD, LA JOLLA, CA, 92037

📞 858-554-3200

NPI: 1184202806

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Individual (NPI-1) Active

DALLAS COTTAM M.D.

Emergency Medicine

📍1300 N VERMONT AVE, LOS ANGELES, CA, 90027

📞 323-644-1300

NPI: 1043423056

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Individual (NPI-1) Active

NANCY J COUNCELBAUM MD

Internal Medicine, Geriatric Medicine

📍16300 SAND CANYON AVE, IRVINE, CA, 92618

📞 949-753-7475

NPI: 1275635013

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Individual (NPI-1) Active

ALEXANDRA FITZGERALD COURS

Internal Medicine

📍300 PASTEUR DR, PALO ALTO, CA, 94304

📞 650-723-4000

NPI: 1962990994

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Individual (NPI-1) Active

HEATHER T COUSINS M D

Internal Medicine, Geriatric Medicine

📍795 EL CAMINO REAL, PALO ALTO, CA, 94301

📞 650-330-4315

NPI: 1255425807

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Individual (NPI-1) Active

ISRAEL B. COUTIN MD

Family Medicine, Geriatric Medicine

📍9961 SIERRA AVE, FONTANA, CA, 92335

📞 909-427-3910

NPI: 1790852663

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Individual (NPI-1) Active

SHERYL OLYNN CRAMER M.D., M.P.H.

Family Medicine, Geriatric Medicine

📍5030 CAMINO DE LA SIESTA, SAN DIEGO, CA, 92108

📞 619-260-6300

NPI: 1548468390

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🗺 Cities in California

📍 Los Angeles 📍 San Diego 📍 San Jose 📍 San Francisco 📍 Fresno 📍 Sacramento 📍 Long Beach 📍 Oakland 📍 Bakersfield 📍 Anaheim 📍 Stockton 📍 Riverside 📍 Santa Ana 📍 Irvine 📍 Chula Vista 📍 Fremont 📍 San Bernardino 📍 Modesto 📍 Moreno Valley 📍 Huntington Beach

📊 Quick Stats

Providers Listed 200
Cities Found 20
State California
Source NPPES NPI Registry

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Healthcare in California

California operates the largest state healthcare system in the United States, serving nearly 40 million residents across a diverse landscape of urban megacities, agricultural valleys, and remote mountain communities. The state is home to world-renowned medical institutions including UCSF Medical Center, Cedars-Sinai Medical Center, Stanford Health Care, UCLA Health, and the Scripps Health system in San Diego. These institutions consistently rank among the nation's best for cancer care, neurology, cardiology, and transplant medicine.

California's Medi-Cal program is the largest Medicaid program in the country, covering over 14 million low-income Californians. The state has been a national leader in expanding coverage, and recent reforms have extended Medi-Cal eligibility to all income-eligible adults regardless of immigration status. The Covered California marketplace (coveredca.gov) offers subsidized private insurance plans for those who do not qualify for Medi-Cal.

Despite its healthcare wealth, California faces significant disparities in access. Rural counties in the Central Valley and Northern California have severe physician shortages, and many communities lack specialists entirely. The California Department of Health Care Services (DHCS) (dhcs.ca.gov) oversees Medi-Cal and public health programs, while the California Medical Board (mbc.ca.gov) licenses and disciplines physicians.

California has been a pioneer in telehealth legislation, requiring insurers to cover telehealth services at parity with in-person visits, significantly improving access for rural and underserved populations.

Frequently Asked Questions — California Healthcare