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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 1–15 of 200 providers
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Individual (NPI-1) Active

DAVID R AARONS MD

Internal Medicine, Gastroenterology

📍1121 WEST VINE ST, LODI, CA, 95240

📞 209-334-3153

NPI: 1619081379

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Individual (NPI-1) Active

ALEXANDER PHILIP ABADIR MD

Internal Medicine, Gastroenterology

📍34 MAPLE ST, NORWALK, CT, 06850

📞 203-852-2000

NPI: 1811429699

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Individual (NPI-1) Active

CONSTANTE U ABAYA MD

Internal Medicine, Gastroenterology

📍1200 N VENTURA RD, OXNARD, CA, 93030

📞 805-983-0730

NPI: 1003918459

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Individual (NPI-1) Active

SADEEA ABBASI M.D., Ph.D.

Internal Medicine, Gastroenterology

📍1200 N STATE ST, LOS ANGELES, CA, 90033

📞 323-226-7556

NPI: 1366713513

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Individual (NPI-1) Active

CHRISTOPHER ABBOTT M.D.

Internal Medicine

📍2650 CAMINO DEL RIO N, SAN DIEGO, CA, 92108

📞 314-387-5763

NPI: 1578866885

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Individual (NPI-1) Active

MAISA ISMAIL ABDALLA M.D.

Internal Medicine, Gastroenterology

📍601 ELMWOOD AVE, ROCHESTER, NY, 14642

📞 773-968-4925

NPI: 1669645222

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Individual (NPI-1) Active

BASIM ZUHDI ABDELKARIM MD

Internal Medicine, Gastroenterology

📍1310 SAN BERNARDINO RD, UPLAND, CA, 91786

📞 909-920-0444

NPI: 1932217544

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Individual (NPI-1) Active

HOMAN ABDOLLAHZADEH MD

Internal Medicine, Gastroenterology

📍1330 N INDIAN CANYON DR, PALM SPRINGS, CA, 92262

📞 760-864-4163

NPI: 1184634826

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Individual (NPI-1) Active

JOHN DANIEL ABDULIAN M.D.

Internal Medicine, Gastroenterology

📍7095 N CHESTNUT AVE STE 101, FRESNO, CA, 93720

📞 559-323-8200

NPI: 1437114113

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Individual (NPI-1) Active

HUSSEIN ABIDALI DO

Internal Medicine, Gastroenterology

📍7974 HAVEN AVE STE 210, RANCHO CUCAMONGA, CA, 91730

📞 909-941-0661

NPI: 1205274768

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Individual (NPI-1) Active

ALAA ABOUSAIF MD

Internal Medicine, Gastroenterology

📍1010 W LA VETA AVE, ORANGE, CA, 92868

📞 714-835-7700

NPI: 1235124108

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Individual (NPI-1) Active

DONALD ROBERT ABRAHM M.D.

Internal Medicine, Gastroenterology

📍1525 SUPERIOR AVENUE, NEWPORT BEACH, CA, 92663

📞 949-631-2670

NPI: 1215022405

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Individual (NPI-1) Active

MARIA TERESA ABREU M.D.

Internal Medicine, Gastroenterology

📍8700 BEVERLY BLVD STE AC1125, WEST HOLLYWOOD, CA, 90048

📞 310-423-4100

NPI: 1598793374

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Individual (NPI-1) Active

SAFWAT MAHER ABSOOD M.D.

Internal Medicine, Gastroenterology

📍500 COFFEE RD, MODESTO, CA, 95355

📞 209-576-1621

NPI: 1932113891

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Individual (NPI-1) Active

BARHAM K. ABU DAYYEH MD

Internal Medicine, Gastroenterology

📍8700 BEVERLY BLVD, WEST HOLLYWOOD, CA, 90048

📞 310-423-6082

NPI: 1902927353

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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