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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 106–120 of 200 providers
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Organization (NPI-2) Active

COPLEY MEDICAL OF NEW YORK, P.C.

Internal Medicine

📍17595 HARVARD AVE STE C803, IRVINE, CA, 92614

📞 949-981-5033

NPI: 1437964228

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Organization (NPI-2) Active

CYNTHIA WILLIAMS M.D. INC.

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍23560 MADISON ST STE 103, TORRANCE, CA, 90505

📞 310-325-9200

NPI: 1205947686

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Organization (NPI-2) Active

D'ARCY A TONG MD INC

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍4420 N 1ST ST, FRESNO, CA, 93726

📞 559-222-4873

NPI: 1154598530

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Organization (NPI-2) Active

DARYOOSH VALAMANESH MD INC

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍255 E BONITA AVE, POMONA, CA, 91767

📞 909-596-7733

NPI: 1164313771

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Organization (NPI-2) Active

DAVID A CHAPPELL MD, MEDICAL CORPORATION

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍141 LYNCH CREEK WAY, PETALUMA, CA, 94954

📞 707-762-0001

NPI: 1821267162

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Organization (NPI-2) Active

DAVID AHN, M.D., INC

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍520 SUPERIOR AVE STE 150, NEWPORT BEACH, CA, 92663

📞 949-764-7366

NPI: 1114501848

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Organization (NPI-2) Active

DAVID BERGER MD INC.

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍11480 BROOKSHIRE AVE, DOWNEY, CA, 90241

📞 562-861-0336

NPI: 1912241019

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Organization (NPI-2) Active

DAVID L PETERSON MD

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍393 BLOSSOM HILL RD, SAN JOSE, CA, 95123

📞 408-227-2646

NPI: 1144358581

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Organization (NPI-2) Active

DEBORAH PLANTE MD PC

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍151 N SUNRISE AVE, ROSEVILLE, CA, 95661

📞 916-367-4000

NPI: 1821537176

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Organization (NPI-2) Active

DEO MARTINEZ MD PC

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍13050 HEACOCK ST, MORENO VALLEY, CA, 92553

📞 951-656-1660

NPI: 1962560235

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Organization (NPI-2) Active

DERALD L SEID D O A MEDICAL CORPORATION

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍2250 HAYES ST, SAN FRANCISCO, CA, 94117

📞 415-221-1901

NPI: 1760466577

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Organization (NPI-2) Active

DIABETES & ENDOCRINOLOGY CENTER, INC.

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍1812 VERDUGO BLVD, GLENDALE, CA, 91208

📞 818-790-7100

NPI: 1902075203

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Organization (NPI-2) Active

DIABETES AND ENDOCRINE ASSOCIATES

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍8851 CENTER DR, LA MESA, CA, 91942

📞 619-287-9334

NPI: 1881687960

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Organization (NPI-2) Active

DIABETES AND ENDOCRINE SPECIALISTS INC

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍6325 TOPANGA CYN BLVD, WOODLAND HILLS, CA, 91367

📞 818-615-2888

NPI: 1639586001

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Organization (NPI-2) Active

DIABETES AND ENDOCRINOLOGY SPECIALISTS INC.

Internal Medicine, Endocrinology, Diabetes & Metabolism

📍2182 EAST ST, CONCORD, CA, 94520

📞 925-685-4228

NPI: 1447506142

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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