Doctors & clinics in California
79,064 doctors & clinics listed across 805 cities in California.
Doctors & clinics make up 5.8% of California listings, compared with 6.4% across all states we cover. That ranks California #4 of 5 states for this category.
USA Business Search lists 79,064 doctors & clinics in California. The most are in Los Angeles (5,041), San Diego (3,466), San Francisco (3,290).
Updated October 2026Doctors & clinics by city
Showing the 400 cities with the most doctors & clinics. Use search to find any other town.
Well-documented doctors & clinics in California
A sample of listings with a street address, phone number and website, one per city.
Kaiser Permanente
Labcorp
Labcorp
Labcorp
DaVita Kidney Dialysis
Labcorp
Labcorp
Labcorp
DaVita
Labcorp
DaVita
How to choose a doctor in California
- Call your insurance to confirm the provider is in network before your first visit.
- Ask about telehealth options and how to reach the office after hours.
- Ask how long it usually takes to get a new-patient appointment.
Check the license: Medical Board of California.
Medical weight loss and GLP-1 care in California: what to ask
- GLP-1 medicines such as semaglutide and tirzepatide are prescription-only. A licensed prescriber should review your health history and any labs.
- Ask whether the medication is an FDA-approved brand or a compounded version, and which pharmacy fills it.
- Ask for the full monthly cost in writing: visits, medication, shipping and follow-up.
- Ask how side effects are monitored and how often you will check in with a clinician or dietitian.
See the medical weight loss guide for providers by state.
Common questions
How many doctors & clinics are listed in California?
USA Business Search lists 79,064 doctors & clinics across 805 California cities and towns.
Which California cities have the most doctors & clinics?
Los Angeles (5,041), San Diego (3,466), San Francisco (3,290), Sacramento (1,540), San Jose (1,454).
How do I choose a doctor in California?
Call your insurance to confirm the provider is in network before your first visit. Ask about telehealth options and how to reach the office after hours. Check the license with the Medical Board of California.
How do I add or fix a listing?
Listings are free. Use Add your business, or the Claim or fix link on any listing.
Do I need a prescription for GLP-1 weight loss in California?
Yes. Semaglutide and tirzepatide are prescription medications, and a licensed provider decides whether they are appropriate for you. Telehealth programs such as Elevation Health (featured) review your intake from home.
