Cardiologists specialise in the heart and blood vessels: rhythm, blood pressure, cholesterol and heart disease. Below are 50 cardiologists practising in California, across Los Angeles, San Diego, San Francisco, Sacramento, Stanford and Beverly Hills, with what to bring and ask so your visit counts.
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Listings come from the CMS NPPES NPI Registry, the public federal record of licensed providers, checked October 2026. Being listed is not a recommendation or an endorsement, and we do not receive anything from these doctors. Call the office to confirm insurance, availability and that they are accepting new patients. In an emergency, call 911.
When to see a cardiologist
Common reasons
Chest discomfort or pressure
Palpitations and irregular heartbeat
High blood pressure that is hard to control
High cholesterol and heart disease risk
Shortness of breath with activity
Signs it may be time
Your primary care doctor referred you
You notice palpitations, a racing or skipped heartbeat
You have a strong family history of heart disease
A watch or test flagged an irregular rhythm
How to get the most from your cardiologist visit
1
Before: what to bring
A list of everything you take, including supplements, with how often
Your insurance card and photo ID
Recent lab results or imaging reports, if another clinician ordered them
Home blood pressure readings, with dates and times
Any ECG or rhythm notifications from your watch
2
During: questions to ask
What does my heart rhythm or test result show?
What is my overall heart risk, and what changes it most?
Which symptoms mean I should call right away?
How should I track my heart rate or blood pressure at home?
3
After: what to keep track of
When palpitations or chest symptoms happen, and what you were doing
Resting heart rate and blood pressure
Exercise, sleep, caffeine and alcohol
After your visit
Keep the plan going between appointments
Cardiology care is mostly what you do between visits. Patterns in heart rate, blood pressure and symptoms over weeks tell your cardiologist far more than a single reading in the office. Apple Health already records much of this; the trick is seeing it next to how you felt. Emerge Care, free to download on iPhone, is built for exactly that: tell it how you feel in your own words, get plain answers with the source behind every fact, and walk into your next cardiologist appointment in California with a one-page summary and your questions ready.
Log symptoms and side effects by talking
Answers that name their source
One-page visit summary PDF
Health records stay on your iPhone
Emerge Care never diagnoses or replaces your doctor.
Questions
How do I find a cardiologist in California?
This page lists 50 cardiologists practising in California, including Los Angeles, San Diego, San Francisco, Sacramento, Stanford and Beverly Hills, from the federal NPI Registry. Call the office to confirm they take your insurance and are accepting new patients.
Do I need a referral to see a cardiologist in California?
It depends on your insurance plan, not the state. HMO plans usually need a referral from your primary care doctor; many PPO plans do not. Check with your plan before booking.
What should I bring to my first cardiologist appointment?
A list of everything you take, including supplements, with how often; Your insurance card and photo ID; Recent lab results or imaging reports, if another clinician ordered them; Home blood pressure readings, with dates and times; Any ECG or rhythm notifications from your watch.
Do I need a referral to see a cardiologist?
It depends on your insurance. Many plans need a referral from your primary care doctor; others let you book directly. Check with your plan first.
When are chest symptoms an emergency?
Chest pain or pressure, especially with shortness of breath, sweating, nausea or pain spreading to the arm, jaw or back, needs emergency care. Call 911 rather than waiting for an appointment.
