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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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Organization (NPI-2) Active

ABBA I. TERR, M.D. & LENORE C. TERR, M.D., A MEDICAL CORPORATION

Allergy & Immunology

📍450 SUTTER ST, SAN FRANCISCO, CA, 94108

📞 415-433-7800

NPI: 1205933249

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Individual (NPI-1) Active

SHIELDS BREWSTER ABERNATHY M.D.

Internal Medicine, Allergy & Immunology

📍1050 LAS TABLAS RD, TEMPLETON, CA, 93465

📞 805-434-1000

NPI: 1508886235

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Organization (NPI-2) Active

ABRAHAM ISHAAYA, M.D. A PROFESSIONAL CORPORATION

Internal Medicine, Pulmonary Disease

📍5901 W OLYMPIC BLVD, LOS ANGELES, CA, 90036

📞 323-954-1788

NPI: 1841242948

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Individual (NPI-1) Active

EDSEL MISAEL ABUD MD, PhD

Allergy & Immunology

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

📞 858-554-3200

NPI: 1891257192

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Individual (NPI-1) Active

SEEMA SHARMA ACEVES M.D., Ph.D.

Allergy & Immunology

📍8110 BIRMINGHAM WAY, SAN DIEGO, CA, 92123

📞 858-966-5961

NPI: 1366511628

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Organization (NPI-2) Active

ACUTE ALLERGY ASTHMA AND IMMUNOLOGY OF ATHERTON, INC.

Allergy & Immunology

📍3301 EL CAMINO REAL, ATHERTON, CA, 94027

📞 650-559-9577

NPI: 1275853343

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Individual (NPI-1) Active

DANIEL C. ADELMAN M.D.

Internal Medicine

📍400 PARNASSUS AVE, SAN FRANCISCO, CA, 94143

📞 415-353-2725

NPI: 1922041821

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Organization (NPI-2) Active

ADULT & CHILD ALLERGY-ASTHMA CLINIC INC

Allergy & Immunology

📍1850 S AZUSA AVE STE 206, HACIENDA HEIGHTS, CA, 91745

📞 626-810-5450

NPI: 1801909668

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Organization (NPI-2) Active

ADULT & PEDIATRIC ALLERGY & ASTHMA SPECIALISTS, INC.

Allergy & Immunology

📍1250 CONCANNON BLVD, LIVERMORE, CA, 94550

📞 925-443-8200

NPI: 1861624827

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Organization (NPI-2) Active

ADVENTIST HEALTH PHYSICIANS NETWORK

Family Medicine

📍5400 W HILLSDALE AVE, VISALIA, CA, 93291

📞 559-738-7500

NPI: 1700592920

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Organization (NPI-2) Active

AHDAD ZIYAR, M.D., INC.

Internal Medicine, Allergy & Immunology

📍801 N TUSTIN AVE STE 605, SANTA ANA, CA, 92705

📞 714-584-9930

NPI: 1124726989

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Individual (NPI-1) Active

AISHA AHMED M.D.

Pediatrics

📍9000 W WISCONSIN AVE, MILWAUKEE, WI, 53226

📞 414-337-7030

NPI: 1427291210

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Individual (NPI-1) Active

SAM S AHN M.D.

Internal Medicine, Allergy & Immunology

📍1100 PEAR TREE LN, NAPA, CA, 94558

📞 707-258-8100

NPI: 1558423814

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Individual (NPI-1) Active

TERRIE SUSIE AHN MD

Allergy & Immunology

📍1245 16TH ST, SANTA MONICA, CA, 90404

📞 310-481-4646

NPI: 1093166795

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Organization (NPI-2) Active

AIRE MEDICAL GROUP, INC.

Allergy & Immunology, Allergy

📍191 S BUENA VISTA ST STE 330, BURBANK, CA, 91505

📞 818-561-4533

NPI: 1104248871

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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