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Home > CA Providers > Cardiac Electrophysiologists

Dr. Danny Yoonsang Lee, MD

Accepting New Patients

(167 Ratings)

Specializes in: Cardiac Electrophysiology (Heart Rhythm) and Adult Cardiology

Brown University, Alpert Medical School (2011)

Professional interests include: chronic total occlusion (CTO), coronary artery disease, atherosclerosis of the aorta, and more.

100 E. Valencia Mesa Drive Suite 206
Fullerton, CA 92835

(714) 446-5050

Dr. Danny Yoonsang Lee, MD is a cardiac electrophysiologist in ORANGE, CA specializing in cardiac electrophysiology (heart rhythm) and adult cardiology. He graduated from Brown University, Alpert Medical School in 2011 and has 14 years of experience. Dr. Danny Yoonsang Lee, MD is affiliated with Providence, AHMC Healthcare, St. Joseph Heritage Medical Group, Providence Medical Foundation, St. Jude Medical Center (Fullerton), St. Jude Heritage Medical Group and St. Joseph Hospital (Orange).

Office Locations

1140 W LA VETA AVENUE SUITE 430
ORANGE, CA 92868

open_in_new

St. Joseph Hospital (Orange)

100 E. Valencia Mesa Drive Suite 206
Fullerton, CA 92835

(714) 446-5050

(714) 446-5150

open_in_new

801 N Tustin Avenue #706
Santa Ana, CA 92705

open_in_new

Some issues Dr. Danny Yoonsang Lee, MD can help you with:

Coronary Artery Disease

Coronary artery disease (CAD) is the most common type of heart disease. It happens when the blood vessels carrying blood to the heart, called coronary arteries, narrow and harden. This occurs when cholesterol, a type of fat found in the blood, builds up to form plaque, which sticks to the inner walls of the arteries. As plaque accumulates, less blood can flow through the arteries, which may lead to the following:

Angina, which is chest pain that occurs when the heart does not receive enough blood flow.
Heart attack, which happens if the arteries leading to the heart are completely blocked.
Arrhythmia, or irregular heartbeat, which can develop if the heart does not have enough blood supply.
Heart failure, which may occur if a heart attack damages the heart and it becomes too weak to pump enough blood to the rest of the body.

Certain factors may increase risk for the disease, like smoking, lack of exercise, being overweight, high cholesterol, high blood pressure, and diabetes. CAD tends to develop over decades, so it can go undetected until it has become quite severe. A diagnosis may be established using such tests as:

Electrocardiogram (ECG), which records the heart's electrical activity over a period of time. ECGs can detect whether there is enough blood flow to the heart or if a heart attack has occurred.
Echocardiogram (echo), which creates images of the heart using sound waves. Echos can show whether the heart is able to pump blood normally.
Stress tests, where an ECG or echo is combined with exercise, like riding a stationary bike or walking on a treadmill. This test is done to find out if the heart can function properly while performing a strenuous activity.

Treatments for the disease include medications such as vasodilators, like nitroglycerin, which dilates (widens) the coronary arteries. CAD may also be treated by a procedure called angioplasty with stent placement, where a balloon is inflated inside a diseased artery to flatten the plaque deposits against the artery walls, creating more room for blood to flow.

In some severe cases of the disease, multiple arteries may be blocked, and an open heart surgery called coronary artery bypass surgery may be necessary. This operation transplants a vessel from another part of the body to form a graft that goes past the narrowed arteries, thus enabling blood to flow around those arteries.

Heart Attack

A heart attack is a serious medical event that happens when the blood supplying oxygen to the heart is cut off, usually because of a blockage in an artery. This results in damage or death of part of the heart muscle. The heart can heal, but like any part of the body that was injured it leaves a scar. This scar tissue does not contract effectively, so the ability of the heart to pump is lowered after a heart attack.

A heart attack, sometimes called a myocardial infarction, can happen without warning. However there are certain factors that raise the risk of heart attack. Some of these are:

Age
Gender (most heart attack sufferers are male)
A family history of heart attacks
Smoking
Obesity
High cholesterol
High blood pressure
Diabetes
Unhealthy lifestyle choices (lack of exercise, poor diet, too much alcohol or stress)

Heart attacks typically feel like pain or pressure in the chest that can radiate out to the back, arm, or jaw. Some other symptoms can include fatigue or weakness, shortness of breath, sweating, and nausea.

Treatment aims to increase blood flow to the heart muscle by opening up blocked blood vessels. Medications are sometimes used to dissolve clots in the arteries. Aspirin and other medications such as Plavix can thin the blood and make clots less likely to form. Dilators can widen blood vessels to make room for more blood to flow. Doctors can also use a procedure called catheterization to look at the blood vessels around the heart directly, place stents, or widen vessels using angioplasty. In extreme cases bypass surgery can be used to help blood flow better. After recovery, it is important to lead a healthy lifestyle and take any prescribed medications in order to protect the heart.

Heart Problems

The heart is one of the most important organs in the body. This smooth muscle expands and contracts rhythmically an entire lifetime, pumping blood to the lungs and then to every other cell in the body. When heart problems occur, it becomes difficult for the body to get the nutrients and oxygen it needs via the blood. So while there are a variety of illnesses and disorders that affect the heart, most of them cause weakness, exhaustion and shortness of breath. The most common heart conditions include heart disease, angina, arrhythmia, and valve disorders.

Heart disease is the leading cause of death in the United States for both men and women. This includes coronary artery disease, heart attacks, congestive heart failure, and congenital heart disease. Some conditions, such as genetics, cannot be controlled. But there are many other things one can do to lower their risk for heart disease. Controlling high blood pressure and cholesterol levels, reducing or stopping smoking, exercising more and losing weight if needed, and eating a diet low in sodium can all protect the heart.

Angina is a squeezing type of chest pain that happens when the muscles around the heart don't get enough oxygen. It can be regular or infrequent. Usually, angina is caused by coronary heart disease. However, not all chest pain is angina. Chest pain can also be caused by a lung infection or panic attack, for example, so it is important to have any sudden pain checked.

Arrhythmia is the word for when the heart beats too fast, too slow, or irregularly with skipped beats. It can feel frightening, and depending on the type it can be dangerous, but in most cases arrhythmia is not serious and can be treated. It is very common, especially in older adults.

Heart valve problems can happen in any one of the the heart's four valves that keep blood flowing where it needs to go. Babies can be born with problems in their heart valves, or valves can be damaged by infections. The valves can stiffen and become less mobile, or they can stop closing properly and 'leak' when the heart beats. Valve problems can usually be repaired surgically.

Noteworthy Medicare Patient Procedures Performed by Dr. Danny Yoonsang Lee, MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 25%

By Volume:

cardiac device implantation

In 2013, Dr. Danny Yoonsang Lee, MD performed more cardiac device implantation procedures for Medicare patients than 75% of providers in related specialties within California.

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Danny Yoonsang Lee, MD treated as a cardiac electrophysiologist in ORANGE, CA during 2019 were hospital care, inpatient care, ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Danny Yoonsang Lee, MD for Medicare patients.

cardiac procedures	66
doctor visit	63
hospital care	178
inpatient care	178
ultrasound (sonogram)	66

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Danny Yoonsang Lee, MD.

**Gender**
Male	80
Female	96

**Ethnicity**
Non-Hispanic White	91
Black	0
Hispanic	0
Asian	44
Other	0
Native American	0

**Age**
From 65 to 74	61
From 75 to 84	53
85 and over	31
Less than 65	31

Conditions of Medicare patients treated by Dr. Danny Yoonsang Lee, MD in 2019

The most common conditions of Medicare patients that Dr. Danny Yoonsang Lee, MD treated during 2019 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	72
Stroke	7
Ischemic Heart Disease	60
Depression	38
Chronic Kidney Disease	55
Asthma	9
Osteoperosis	15
Atrial Fibrilation	27
Heart Failure	53
Chronic Obstructive Pulmonary Disease	24
Diabetes	55
Dementia	30
Cancer	18

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Danny Yoonsang Lee, MD treated as a cardiac electrophysiologist in ORANGE, CA during 2020 were hospital care, inpatient care, ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Danny Yoonsang Lee, MD for Medicare patients.

cardiac procedures	68
doctor visit	121
hospital care	250
inpatient care	250
ultrasound (sonogram)	68

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Danny Yoonsang Lee, MD.

**Gender**
Male	214
Female	219

**Ethnicity**
Non-Hispanic White	194
Black	19
Hispanic	119
Asian	84
Other	17
Native American	0

**Age**
From 65 to 74	128
From 75 to 84	134
85 and over	109
Less than 65	62

Conditions of Medicare patients treated by Dr. Danny Yoonsang Lee, MD in 2020

The most common conditions of Medicare patients that Dr. Danny Yoonsang Lee, MD treated during 2020 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	73
Stroke	13
Ischemic Heart Disease	68
Depression	34
Chronic Kidney Disease	63
Asthma	12
Osteoperosis	14
Atrial Fibrilation	31
Heart Failure	59
Chronic Obstructive Pulmonary Disease	28
Diabetes	53
Dementia	34
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Danny Yoonsang Lee, MD treated as a cardiac electrophysiologist in ORANGE, CA during 2021 were hospital care, inpatient care, ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Danny Yoonsang Lee, MD for Medicare patients.

cardiac procedures	75
doctor visit	213
hospital care	285
inpatient care	285
ultrasound (sonogram)	75

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Danny Yoonsang Lee, MD.

**Gender**
Male	161
Female	166

**Ethnicity**
Non-Hispanic White	145
Black	12
Hispanic	83
Asian	74
Other	13
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	82
85 and over	85
Less than 65	56

Conditions of Medicare patients treated by Dr. Danny Yoonsang Lee, MD in 2021

The most common conditions of Medicare patients that Dr. Danny Yoonsang Lee, MD treated during 2021 were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension	75
High Cholesterol	72
Stroke	12
Ischemic Heart Disease	55
Depression	31
Chronic Kidney Disease	55
Asthma	9
Osteoperosis	15
Atrial Fibrilation	36
Heart Failure	50
Chronic Obstructive Pulmonary Disease	19
Diabetes	53
Dementia	27
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Danny Yoonsang Lee, MD treated as a cardiac electrophysiologist in ORANGE, CA during 2022 were hospital care, inpatient care, minimally invasive procedures and cardiac procedures.

Volume of procedures performed by Dr. Danny Yoonsang Lee, MD for Medicare patients.

cardiac procedures	35
cardioversion	12
doctor visit	308
hospital care	129
implant surgery	12
inpatient care	129
minimally invasive procedures	35
ultrasound (sonogram)	23

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Danny Yoonsang Lee, MD.

**Gender**
Male	159
Female	144

**Ethnicity**
Non-Hispanic White	213
Black	0
Hispanic	38
Asian	35
Other	0
Native American	0

**Age**
From 65 to 74	100
From 75 to 84	117
85 and over	67
Less than 65	19

Conditions of Medicare patients treated by Dr. Danny Yoonsang Lee, MD in 2022

The most common conditions of Medicare patients that Dr. Danny Yoonsang Lee, MD treated during 2022 were high cholesterol, hypertension, atrial fibrilation and ischemic heart disease.

Hypertension	75
High Cholesterol	75
Stroke	20
Ischemic Heart Disease	48
Depression	15
Chronic Kidney Disease	38
Asthma	15
Osteoperosis	17
Atrial Fibrilation	61
Heart Failure	43
Chronic Obstructive Pulmonary Disease	24
Diabetes	35
Dementia	14
Cancer	20

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Danny Yoonsang Lee, MD treated as a cardiac electrophysiologist in ORANGE, CA during 2023 were hospital care, inpatient care, minimally invasive procedures and cardiac procedures.

Volume of procedures performed by Dr. Danny Yoonsang Lee, MD for Medicare patients.

ablation	15
blood draw	12
cardiac procedures	78
cardioversion	13
catheterization	15
diagnostic procedures	15
doctor visit	423
hospital care	129
implant surgery	33
implantable cardioverter-defibrillator (ICD) replacement	11
inpatient care	129
minimally invasive procedures	93
ultrasound (sonogram)	30

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Danny Yoonsang Lee, MD.

**Gender**
Male	207
Female	202

**Ethnicity**
Non-Hispanic White	306
Black	0
Hispanic	43
Asian	42
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	174
85 and over	89
Less than 65	19

Conditions of Medicare patients treated by Dr. Danny Yoonsang Lee, MD in 2023

The most common conditions of Medicare patients that Dr. Danny Yoonsang Lee, MD treated during 2023 were high cholesterol, hypertension, atrial fibrilation and heart failure.

Hypertension	75
High Cholesterol	75
Stroke	21
Ischemic Heart Disease	49
Depression	16
Chronic Kidney Disease	44
Asthma	14
Osteoperosis	19
Atrial Fibrilation	63
Heart Failure	49
Chronic Obstructive Pulmonary Disease	19
Diabetes	34
Dementia	11
Cancer	21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2019 - 2023

Volume of procedures performed by Dr. Danny Yoonsang Lee, MD for Medicare patients.

The highest averages for the top procedures that Dr. Danny Yoonsang Lee, MD treated as a cardiac electrophysiologist in ORANGE, CA were hospital care, inpatient care, minimally invasive procedures and cardiac procedures.

ablation	15
blood draw	12
cardiac procedures	64
cardioversion	12
catheterization	15
diagnostic procedures	15
doctor visit	225
hospital care	194
implant surgery	22
implantable cardioverter-defibrillator (ICD) replacement	11
inpatient care	194
minimally invasive procedures	64
ultrasound (sonogram)	52

Average Medicare Patient Data From 2019 - 2023

Information about Medicare patients treated by Dr. Danny Yoonsang Lee, MD.

**Gender**
Male	164
Female	165

**Ethnicity**
Black / African American	6
Asian / Pacific Islander	55
Non-Hispanic White	189
Native American / Alaskan Native	0
Hispanic	56
Other	6

**Age**
75 to 84	112
85 and over	76
Less than 65	37
65 to 74	104

Average of Total of Conditions of Medicare patients treated by Dr. Danny Yoonsang Lee, MD From 2019 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Danny Yoonsang Lee, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	73
Stroke	14
Ischemic Heart Disease	56
Depression	26
Chronic Kidney Disease	51
Asthma	11
Osteoporosis	16
Heart Failure	50
Chronic Obstructive Pulmonary Disease	22
Diabetes	46
Atrial Fibrillation	43
Cancer	16
Dementia	23

Education & Training

Dr. Danny Yoonsang Lee, MD graduated from Brown University, Alpert Medical School in 2011. He is certified by the American Board of Internal Medicine, Internal Medicine and has a state license in California.

Medical School: Brown University, Alpert Medical School (2011)

Board Certification: American Board of Internal Medicine, Internal Medicine

Licensed In: California

Affiliations & Hospitals

Dr. Danny Yoonsang Lee, MD is associated with these hospitals and organizations:

Providence

AHMC Healthcare

St. Joseph Heritage Medical Group

Providence Medical Foundation

St. Jude Medical Center (Fullerton)

St. Jude Heritage Medical Group

St. Joseph Hospital (Orange)

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Danny Yoonsang Lee, MD appears to accept the following insurance providers: Aetna PPO, Aetna HMO, CIGNA PPO, CIGNA HMO, Blue Shield of California, MultiPlan PPO, Medicare Advantage, HealthSmart, Interplan PPO, TRICARE, Anthem Blue Cross HMO, Humana, Anthem Blue Cross PPO, Health Net PPO, Health Net HMO, Anthem, Coventry PPO, United Healthcare PPO, United Healthcare HMO, Providence, US Family Health Plan, Aetna Medicare PPO, ChoiceHumana PPO and CoventryFirst Health PPO.

Insurance Accepted by Provider includes:

According to our sources, Dr. Danny Yoonsang Lee, MD accepts the following insurance providers:

Aetna PPO

Aetna HMO

CIGNA PPO

CIGNA HMO

Blue Shield of California

MultiPlan PPO

Medicare Advantage

HealthSmart

Interplan PPO

TRICARE

Anthem Blue Cross HMO

Humana

Anthem Blue Cross PPO

Health Net PPO

Health Net HMO

Anthem

Coventry PPO

United Healthcare PPO

United Healthcare HMO

Providence

US Family Health Plan

Aetna Medicare PPO

ChoiceHumana PPO

CoventryFirst Health PPO

Ratings & Reviews

Dr. Danny Yoonsang Lee, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 167 ratings. We collect ratings and reviews of Dr. Danny Yoonsang Lee, MD from all over the web to help you find the right in ORANGE, CA.

Overall Rating

(167 Ratings)

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General Payments

These charts describe general payments received by Dr. Danny Yoonsang Lee, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Abbott Laboratories	$6,851 AVEIR $2,193	Assurity Pacemaker $1,426	CardioMEMS HF System $871	MitraClip $296	Ensite Cardiac Mapping System $257	Other $1,808
Medtronic Vascular, Inc.	$3,885 Micra $1,325	Arctic Front $691	Azure $167	STENTS $102	Amplia MRI $88	Other $1,512
Boston Scientific Corporation	$1,915 GENERAL THERAPIES $578	WATCHMAN Access System $168	GENERAL - TACHY GENERATORS $139	SQ-RX PULSE GENERATOR $121	WATCHMAN $119	Other $790
Medtronic, Inc.	$1,221 LINQ II $448	Micra $429	COBALT DR MRI SURESCAN $109	DiamondTemp $94	AZURE XT DR MRI SURESCAN $63	Other $78
Philips North America LLC	$986 (9520) IGT Devices Undivided $653	(BS2) LM Undivided $333
Other	$4,506 Vascular $425	Carto 3 $304	Electrophysiology (EP) $224	Repatha $205	ENTRESTO $198	Other $3,150

**Types of Payments**
Food and Beverage	$12,060
Travel and Lodging	$6,628
Education	$676

Biography

Dr. Danny Lee's specialties are adult cardiology and cardiac electrophysiology (heart rhythm). He practices in Fullerton, CA, Santa Ana, CA, and Orange, CA. Patients rated him highly, giving him an average of 5.0 stars (out of 5). His areas of expertise include coronary angiogram, myxoma, and rheumatic heart disease. Dr. Lee appears to be an in-network provider for Anthem, Blue California, and HealthSmart, in addition to other insurance carriers. After completing medical school at Brown University, Alpert Medical School, he performed his residency at Harbor-UCLA Medical Center. In addition to English, Dr. Lee speaks Korean. His hospital/clinic affiliations include St. Joseph Heritage Medical Group and AHMC Healthcare. His practice in Fullerton, CA is open to new patients as reported by Providence Medical Foundation.