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Dr. John Gunn Lee, MD

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(John G. Lee, MD)

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Specializes in: Gastroenterology (Digestive System) and General Practice

University of Miami, Miller School of Medicine (1987)

Professional interests include: cancer, gastrointestinal problems (digestive disorders)

101 The City Drive South Building 22C
Orange, CA 92868

(949) 824-8600

Dr. John Gunn Lee, MD is a gastroenterologist in Orange, CA specializing in gastroenterology (digestive system) and general practice. He graduated from University of Miami, Miller School of Medicine in 1987 and has 37 years of experience. Dr. John Gunn Lee, MD is affiliated with UC Irvine Health, UCI Health Chao Family Comprehensive Digestive Disease Center and UC REGENTS.

Office Locations

Address:

101 The City Drive South Building 22C
Orange, CA 92868

Address:

1 Medical Plaza Drive
Irvine, CA 92697

Some issues Dr. John Gunn Lee, MD can help you with:

Gastrointestinal Problems (Digestive Disorders)

The gastrointestinal system, or GI tract, is the name given to a collection of organs that work together to digest food. These organs fit together in a long tube, running from the mouth to the anus, and include the esophagus, stomach, and intestines, among others. With so many parts working together, complicated by today's busy lifestyles and diets, digestive problems are common. As many as 1 in 3 Americans have a digestive or GI disorder. There are a huge variety of digestive problems, but the most common are IBS, constipation, GERD, hemorrhoids, and ulcers.

IBS, or irritable bowel syndrome, happens when the muscles surrounding the colon contract too easily or frequently. The result is abdominal pain, cramps, diarrhea or constipation, gas and bloating. IBS attacks can often be brought on by specific triggers, so a key part of treatment is learning which foods trigger IBS attacks and avoiding them. Treatment also includes exercise, avoiding stress, and medications if needed.

Constipation, or large, hard, or infrequent stools, happens to everyone at some point. It can be caused by a disruption in routine or food, or by eating a diet without many fresh fruits and vegetables. Although it is uncomfortable, constipation is common and usually not serious, but it can sometimes become chronic. Adding fiber to the diet, exercising, and taking medications may help.

GERD, or gastroesophageal reflux disease, is a severe form of chronic heartburn where stomach acid spills back up into the esophagus. Left untreated, the acid may even eat away at the esophagus and cause serious damage. Treatment includes changing the diet to avoid trigger foods, losing weight if needed, medications, or even surgery.

Hemorrhoids are blood vessels around the rectum that become irritated, swollen or torn while straining during a bowel movement. They are most often caused by constipation, but can also be caused by pregnancy, diarrhea, or simply a genetic predisposition towards hemorrhoids. Treatment involves first treating any constipation issues, then keeping the area clean and soothed until it has healed. If these measures are ineffective, surgery is sometimes used.

Peptic ulcers are sores or spots of inflammation in the lining of the stomach or close to the stomach in the small intestine. Usually this area is coated with a protective lining that shields the tissue from the strong stomach acid, but a break in the lining can let acid in, causing the sores. It used to be thought that stress caused ulcers, but now it is known that is not the case. Most often, they are caused by an infection by H. pylori bacteria, but ulcers can also be caused by alcohol abuse or overuse of aspirin, ibuprofen, naproxen, or other NSAIDS. The symptoms of an ulcer are pain, hunger, nausea, and fatigue.

Gastrointestinal problems, perhaps more than any other area, are markedly affected by lifestyle. Many disorders can be prevented or treated at least in part by eating a healthy diet high in fiber, exercising regularly, drinking enough water, and limiting alcohol intake. Still, the frequency of digestive disorders means that even the healthiest person can be affected by them. Anyone who notices blood in their stool, experiences abdominal pain, unexplained weight loss, or any significant change in bowel movements should see a doctor.

In The News

“* Lunch and Learn With Kirsten Leute and John Lee (UCI Applied Innovation), Irvine, noon, free, (949) 824-2683, goo.gl/xTjMKq.”—"OCBJ Calendar", Orange County Business Journal, May 2018

“As Dr. John Lee, associate director of the UCI Comprehensive Digestive Disease Center, stressed later, about 150,000 new cases of colorectal cancer are diagnosed annually.”—"Scary to many, but potentially lifesaving", The Orange County Register, October 2013

aspiration	248
balloon dilation	57
diagnostic procedures	641
esophageal dilation	29
foreign body removal	111
gastrointestinal procedures	1725
image guided procedures	248
injections	150
lithotripsy (stone fragmentation)	13
minimally invasive procedures	1725
minor procedures	248
nerve block	15
pain management	15
preventive care	20
pyloric dilation	14
removal of lesion (e.g. growth)	622
stent placement (stenting)	150
ultrasound (sonogram)	594

**Gender**
Male	417
Female	475

**Ethnicity**
Non-Hispanic White	487
Black	32
Hispanic	139
Asian	213
Other	0
Native American	0

**Age**
From 65 to 74	386
From 75 to 84	308
85 and over	99
Less than 65	99

Hypertension	75
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	45
Depression	23
Chronic Kidney Disease	34
Asthma	12
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	25
Chronic Obstructive Pulmonary Disease	18
Diabetes	46
Dementia	12
Cancer	20

aspiration	200
balloon dilation	37
diagnostic procedures	529
esophageal dilation	20
foreign body removal	109
gastrointestinal procedures	1399
image guided procedures	200
injections	126
minimally invasive procedures	1399
minor procedures	200
preventive care	10
removal of lesion (e.g. growth)	540
stent placement (stenting)	97
ultrasound (sonogram)	541

**Gender**
Male	380
Female	428

**Ethnicity**
Non-Hispanic White	464
Black	26
Hispanic	127
Asian	167
Other	0
Native American	0

**Age**
From 65 to 74	361
From 75 to 84	267
85 and over	90
Less than 65	90

Hypertension	75
High Cholesterol	66
Stroke	6
Ischemic Heart Disease	43
Depression	23
Chronic Kidney Disease	35
Asthma	10
Osteoperosis	14
Atrial Fibrilation	12
Heart Failure	23
Chronic Obstructive Pulmonary Disease	18
Diabetes	41
Dementia	12
Cancer	22

anastomosis	10
aspiration	209
balloon dilation	16
catheterization	10
diagnostic procedures	549
esophageal dilation	17
foreign body removal	96
gastrointestinal procedures	1367
image guided procedures	209
injections	42
minimally invasive procedures	1367
minor procedures	209
preventive care	13
removal of lesion (e.g. growth)	552
stent placement (stenting)	115
ultrasound (sonogram)	536

**Gender**
Male	766
Female	828

**Ethnicity**
Non-Hispanic White	928
Black	58
Hispanic	240
Asian	306
Other	0
Native American	0

**Age**
From 65 to 74	736
From 75 to 84	536
85 and over	152
Less than 65	170

Hypertension	75
High Cholesterol	65
Stroke	7
Ischemic Heart Disease	41
Depression	24
Chronic Kidney Disease	39
Asthma	15
Osteoperosis	12
Atrial Fibrilation	15
Heart Failure	23
Chronic Obstructive Pulmonary Disease	18
Diabetes	44
Dementia	11
Cancer	19

aspiration	185
balloon dilation	20
diagnostic procedures	508
esophageal dilation	21
foreign body removal	70
gastrointestinal procedures	1262
hospital care	20
image guided procedures	185
injections	48
inpatient care	20
minimally invasive procedures	1262
minor procedures	185
preventive care	13
removal of lesion (e.g. growth)	526
stent placement (stenting)	103
ultrasound (sonogram)	507

**Gender**
Male	348
Female	412

**Ethnicity**
Non-Hispanic White	418
Black	28
Hispanic	110
Asian	179
Other	0
Native American	0

**Age**
From 65 to 74	335
From 75 to 84	257
85 and over	79
Less than 65	89

Hypertension	75
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	44
Depression	23
Chronic Kidney Disease	43
Asthma	21
Osteoperosis	14
Atrial Fibrilation	14
Heart Failure	24
Chronic Obstructive Pulmonary Disease	18
Diabetes	43
Dementia	11
Cancer	19

aspiration	169
balloon dilation	38
diagnostic procedures	522
esophageal dilation	39
foreign body removal	51
gastrointestinal procedures	1269
image guided procedures	169
injections	61
minimally invasive procedures	1269
minor procedures	169
preventive care	9
pyloric dilation	13
removal of lesion (e.g. growth)	533
stent placement (stenting)	65
ultrasound (sonogram)	487

**Gender**
Male	362
Female	399

**Ethnicity**
Non-Hispanic White	392
Black	34
Hispanic	92
Asian	211
Other	0
Native American	0

**Age**
From 65 to 74	357
From 75 to 84	269
85 and over	63
Less than 65	72

Hypertension	75
High Cholesterol	58
Stroke	7
Ischemic Heart Disease	43
Depression	21
Chronic Kidney Disease	43
Asthma	8
Osteoperosis	15
Atrial Fibrilation	12
Heart Failure	23
Chronic Obstructive Pulmonary Disease	19
Diabetes	46
Dementia	12
Cancer	20

aspiration	198
balloon dilation	50
diagnostic procedures	594
esophageal dilation	28
foreign body removal	45
gastrointestinal procedures	1331
image guided procedures	198
injections	18
minimally invasive procedures	1331
minor procedures	198
removal of lesion (e.g. growth)	616
stent placement (stenting)	97
ultrasound (sonogram)	524

**Gender**
Male	333
Female	399

**Ethnicity**
Non-Hispanic White	387
Black	22
Hispanic	106
Asian	193
Other	0
Native American	0

**Age**
From 65 to 74	319
From 75 to 84	277
85 and over	69
Less than 65	67

Hypertension	75
High Cholesterol	67
Stroke	7
Ischemic Heart Disease	40
Depression	25
Chronic Kidney Disease	47
Asthma	11
Osteoperosis	15
Atrial Fibrilation	14
Heart Failure	25
Chronic Obstructive Pulmonary Disease	21
Diabetes	43
Dementia	13
Cancer	20

aspiration	188
balloon dilation	68
diagnostic procedures	755
esophageal dilation	34
foreign body removal	81
gastrointestinal procedures	1712
hospital care	28
image guided procedures	188
inpatient care	28
minimally invasive procedures	1712
minor procedures	188
preventive care	20
removal of lesion (e.g. growth)	835
stent placement (stenting)	99
ultrasound (sonogram)	589

**Gender**
Male	432
Female	486

**Ethnicity**
Non-Hispanic White	483
Black	28
Hispanic	127
Asian	252
Other	28
Native American	0

**Age**
From 65 to 74	433
From 75 to 84	310
85 and over	92
Less than 65	83

Hypertension	75
High Cholesterol	69
Stroke	7
Ischemic Heart Disease	42
Depression	24
Chronic Kidney Disease	46
Asthma	8
Osteoperosis	14
Atrial Fibrilation	14
Heart Failure	21
Chronic Obstructive Pulmonary Disease	16
Diabetes	41
Dementia	12
Cancer	18

aspiration	165
balloon dilation	83
diagnostic procedures	614
esophageal dilation	38
foreign body removal	97
gastrointestinal procedures	1499
hospital care	39
image guided procedures	165
inpatient care	39
minimally invasive procedures	1499
minor procedures	165
preventive care	11
removal of lesion (e.g. growth)	666
stent placement (stenting)	82
ultrasound (sonogram)	495

**Gender**
Male	310
Female	374

**Ethnicity**
Non-Hispanic White	353
Black	30
Hispanic	98
Asian	173
Other	0
Native American	0

**Age**
From 65 to 74	313
From 75 to 84	236
85 and over	64
Less than 65	71

Hypertension	75
High Cholesterol	72
Stroke	5
Ischemic Heart Disease	49
Depression	26
Chronic Kidney Disease	47
Asthma	8
Osteoperosis	14
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	18
Diabetes	44
Dementia	12
Cancer	19

anastomosis	12
aspiration	318
balloon dilation	138
catheterization	12
diagnostic procedures	1395
esophageal dilation	69
foreign body removal	151
gastrointestinal procedures	3074
hospital care	58
image guided procedures	318
inpatient care	58
minimally invasive procedures	3074
minor procedures	318
preventive care	45
pyloric dilation	26
removal of lesion (e.g. growth)	1527
stent placement (stenting)	175
ultrasound (sonogram)	978

Average Medicare Procedure Volume From 2013 - 2021

Volume of procedures performed by Dr. John Gunn Lee, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Gunn Lee, MD treated as a gastroenterologist in Orange, CA were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

anastomosis	11
aspiration	208
balloon dilation	56
catheterization	11
diagnostic procedures	680
esophageal dilation	32
foreign body removal	90
gastrointestinal procedures	1639
hospital care	36
image guided procedures	208
injections	76
inpatient care	36
lithotripsy (stone fragmentation)	13
minimally invasive procedures	1639
minor procedures	208
nerve block	15
pain management	15
preventive care	18
pyloric dilation	17
removal of lesion (e.g. growth)	716
stent placement (stenting)	109
ultrasound (sonogram)	583

Average Medicare Patient Data From 2013 - 2021

Information about Medicare patients treated by Dr. John Gunn Lee, MD.

**Gender**
Male	334
Female	380

**Ethnicity**
Black / African American	25
Asian / Pacific Islander	169
Non-Hispanic White	391
Native American / Alaskan Native	0
Hispanic	103
Other	2

**Age**
75 to 84	246
85 and over	70
Less than 65	74
65 to 74	324

Average of Total of Conditions of Medicare patients treated by Dr. John Gunn Lee, MD From 2013 - 2021

The highest averages of the most common conditions of Medicare patients that Dr. John Gunn Lee, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	60
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	34
Depression	18
Chronic Kidney Disease	33
Asthma	9
Osteoporosis	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	34
Atrial Fibrillation	11
Cancer	15
Dementia	9

Education & Training

Dr. John Gunn Lee, MD graduated from University of Miami, Miller School of Medicine in 1987. He completed residency at VA Wadsworth Medical Center. He is certified by the American Board of Internal Medicine, Internal Medicine - General and has a state license in California.

Medical School: University of Miami, Miller School of Medicine (1987)

Residency: VA Wadsworth Medical Center

Board Certification: American Board of Internal Medicine, Internal Medicine - General

Licensed In: California

Affiliations & Hospitals

Dr. John Gunn Lee, MD is associated with these hospitals and organizations:

UC Irvine Health

UCI Health Chao Family Comprehensive Digestive Disease Center

UC REGENTS

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General Payments

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

**Payments by Company**
Ethicon Inc.	$29,159 EVOTECH $29,159
Novartis Pharmaceuticals Corporation	$6,077 NON BRAND $5,691	TASIGNA $386
Cook Incorporated	$4,800 $4,800
Advanced Sterilization Products Services Inc.	$3,000 PENTAX $3,000
Wilson Cook Medical Incorporated	$2,335 $2,335
Other	$5,430 ERBE $439	LINX $288	Humira $265	Hemospray $252	EchoTip $206	Other $3,979

**Types of Payments**
Consulting Fee	$31,250
Travel and Lodging	$5,123
Compensation for serving as faculty or as a speaker for a non-accredited and noncertified continuing education program	$5,000
Food and Beverage	$3,428
Honoraria	$3,000
Other	$3,000

Research Payments

Dr. John Gunn Lee, MD has received 1 research payments totaling $4,900.

Biography

Dr. John Lee specializes in general practice and gastroenterology (digestive system). He is especially interested in gastrointestinal problems (digestive disorders) and cancer. He attended the University of Miami, Miller School of Medicine and then went on to complete his residency at VA Wadsworth Medical Center. Dr. Lee has received the following distinctions: Physicians of Excellence, Orange County Medical Association; Best Doctors in America - Gastroenterology; and Best Teacher Award Super Doctors of Los Angeles County. He is professionally affiliated with UC Irvine Health. According to Yext, new patients are welcome to contact his office in Irvine, CA.