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Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology

Accepting New Patients

(Dr. Karen Chee, MD)

(921 Ratings)

Specializes in: General Practice, Medical Oncology, Adult Oncology and Hematology (Blood Disorders)

University of California, Davis, School of Medicine

Professional interests include: anal cancer, congenital heart disease, eye problems, and more.

1501 Trousdale Avenue
Burlingame, CA 94010

(650) 652-3969

Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology is a general practitioner in San Mateo, CA specializing in general practice, medical oncology, adult oncology and hematology (blood disorders). She graduated from University of California, Davis, School of Medicine. Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology is affiliated with Sequoia Hospital, UCSF Medical Group, Sutter Health, Dignity Health, Brown and Toland Physicians, UCSF Health, Hill Physicians, Cancer Center San Mateo and Sequoia Hospital District.

Office Locations

218 DeAnza Boulevard
San Mateo, CA 94402

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2900 Whipple Avenue Suite 130
Redwood City, CA 94062

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218 De Anza Boulevard
San Mateo, CA 94402

(650) 341-9131

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1825 4th Street Floor 4
San Francisco, CA 94143

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1825 Fourth Street Fourth Floor
San Francisco, CA 94158

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400 PARNASSUS AVENUE FLOOR 4
SAN FRANCISCO, CA 94143

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400 Parnassus Avenue Fourth Floor
San Francisco, CA 94143

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Hill Physicians

1501 Trousdale Avenue
Burlingame, CA 94010

(650) 652-3969

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Hill Physicians

1609 Trousdale Avenue
Burlingame, CA 94010

(650) 369-5811

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225 California Drive
Burlingame, CA 94010

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Some issues Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology can help you with:

Anemia

Anemia is the most common blood disorder. It occurs when the body does not have enough red blood cells to carry oxygen to the tissues. Blood loss, insufficient red blood cell production, and red blood cell destruction are the three main causes of anemia. These issues may arise from such conditions as iron deficiency, heavy periods, ulcers, kidney disease, as well as some forms of cancer.

An individual with anemia will have the following symptoms: shortness of breath, weakness, dizziness, cold hands or feet, paleness, and irritability. Anemia is diagnosed when blood tests show low counts for hemoglobin, which is the protein responsible for carrying oxygen to different tissues throughout the body.

Treatments for anemia are dependent on the kind of anemia an individual has. For example, iron supplementation may correct iron deficiency anemia. For anemia caused by chronic kidney failure, chemotherapy treatments, and HIV/AIDS, a group of medications called erythropoiesis-stimulating agents may be prescribed.

Eye Problems

Millions of people every year have problems with their eyes. Some of the most common eye problems are refractive disorders, glaucoma, diabetic retinopathy, macular degeneration, and cataracts.

Refractive disorders happen when the shape of the eye doesn't let allow someone focus very precisely. They might be myopic (nearsighted), hyperopic (farsighted), or have an astigmatism, which is a focus problem caused by the cornea. Refractive disorders can be corrected by glasses or contacts.

Glaucoma is the leading cause of blindness in the United States. It happens when fluid pressure builds up within the eye and damages the optic nerve. It is treated with medications and surgery.

Diabetic retinopathy is a common complication of diabetes. The retina is tissue at the back of the eye that is filled with numerous, tiny blood vessels. When diabetes damages these delicate blood vessels, they burst or leak, leading to blind spots and blurred vision. Diabetic retinopathy can be treated with laser therapy and surgery, but often vision cannot be restored.

Macular degeneration is common in older adults. The macula is the central part of the retina and is responsible for crisp center vision. Over time, the cells in the macula begin to die, making central vision blurry. An early symptom of macular degeneration is that straight lines appear wavy.

Cataracts happen when the clear lens in the front of the eye becomes cloudy, making things look blurry or faded. They are extremely common in older people. By age 80, more than half of all Americans will have had a cataract. In early stages, prescription glasses and magnifying lenses can help. As the cataracts get worse, surgery to replace the lens may be the best option.

More than just one of the five senses, the eyes are heavily relied upon to communicate, work, and get around every day. It's important to have regular eye exams for vision stays in good shape for years to come.

Lung Issues

Every cell in the body requires oxygen to function and produces carbon dioxide as a waste product. In order to keep the body's tissues constantly supplied with fresh oxygen and to keep waste from building up, the lungs pump air in and out, even while sleeping or unaware. Unfortunately, diseases and disorders affecting the lungs are some of the most common medical problems afflicting people around the world. Some of the most common lung problems include asthma, COPD, pneumonia, and lung cancer.

Asthma is a chronic disease where swollen, inflamed airways make it hard to breathe. It is often brought on by specific triggers. While asthma is a common condition, affecting millions of people, it can also be serious and even fatal in severe cases. Treatment involves avoiding triggers and using inhaled corticosteroid medications.

COPD, or Chronic Obstructive Pulmonary Disease, is the name given to two illnesses that both cause difficulty breathing: emphysema and chronic bronchitis. In emphysema, the air sacs of the lungs become damaged, while with bronchitis they become clogged with mucus. COPD is the fourth leading cause of death in the United States. It is almost always caused by breathing irritants into the lungs, such as smoking or heavy pollution.

Pneumonia is a lung infection that can be caused by bacteria, a virus, or fungi. Most healthy people recover from pneumonia in a week or two, but for some people pneumonia can be fatal. There are treatments available for pneumonia, but the best treatment is to prevent getting sick in the first place. People who are at risk should make sure they get a flu shot every year. There is also a vaccine available for the type of bacteria that causes pneumonia.

Lung cancer occurs when abnormal cells inside the lung grow into a tumor, destroying healthy tissue. Because it is so difficult to detect lung cancer in early stages when it has few symptoms, it is the deadliest form of cancer, responsible for the most cancer deaths both in the U.S. and worldwide. Most lung cancer is caused by exposure to tobacco smoke, but between 10-15% of cases are not linked to smoking.

Some problems with the lungs are minor and are not cause for concern. However if symptoms have lasted for a month or more, even if they are minor, it is worth checking with a healthcare professional. A cough, shortness of breath, or excess mucus production that lingers for weeks are all worth getting looked at.

Noteworthy Medicare Patient Procedures Performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2023

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

Top 10%

By Volume:

biological response modifier therapy

intravenous infusion therapy

intravenous chemotherapy

In 2023, Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology performed more biological response modifier (BRM) therapy, intravenous infusion therapy, and intravenous (IV) chemotherapy procedures for Medicare patients than 90% of providers in related specialties within California.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2012 were hospital care, inpatient care, blood draw and minimally invasive procedures.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	242
blood draw	278
chemotherapy	242
doctor visit	847
hospital care	422
inpatient care	422
lab tests	249
minimally invasive procedures	259
port flush	34

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2013 were minimally invasive procedures, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	222
blood draw	224
chemotherapy	222
doctor visit	710
hospital care	241
inpatient care	241
lab tests	198
minimally invasive procedures	243
nursing home care	28
port flush	39

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	134
Female	221

**Ethnicity**
Non-Hispanic White	286
Black	0
Hispanic	22
Asian	29
Other	0
Native American	0

**Age**
From 65 to 74	149
From 75 to 84	132
85 and over	56
Less than 65	18

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2013

Hypertension	68
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	34
Depression	15
Chronic Kidney Disease	34
Asthma	11
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	30
Chronic Obstructive Pulmonary Disease	19
Diabetes	29
Dementia	7
Cancer	48

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2014 were minimally invasive procedures, blood draw, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

aspiration	11
biological response modifier (BRM) therapy	235
blood draw	239
bone marrow tests	22
chemotherapy	235
diagnostic procedures	11
doctor visit	814
hospital care	228
inpatient care	228
lab tests	227
minimally invasive procedures	277
port flush	58

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	144
Female	244

**Ethnicity**
Non-Hispanic White	315
Black	0
Hispanic	27
Asian	31
Other	0
Native American	0

**Age**
From 65 to 74	155
From 75 to 84	156
85 and over	61
Less than 65	16

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2014

Hypertension	71
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	34
Depression	15
Chronic Kidney Disease	39
Asthma	12
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	30
Chronic Obstructive Pulmonary Disease	20
Diabetes	29
Dementia	6
Cancer	51

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2015 were minimally invasive procedures, chemotherapy, biological response modifier (BRM) therapy and blood draw.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	296
blood draw	268
chemotherapy	296
doctor visit	1046
hospital care	196
inpatient care	196
lab tests	240
minimally invasive procedures	332
port flush	61

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	356
Female	520

**Ethnicity**
Non-Hispanic White	692
Black	0
Hispanic	54
Asian	80
Other	0
Native American	0

**Age**
From 65 to 74	342
From 75 to 84	356
85 and over	150
Less than 65	28

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2015

Hypertension	71
High Cholesterol	57
Stroke	9
Ischemic Heart Disease	26
Depression	16
Chronic Kidney Disease	36
Asthma	11
Osteoperosis	12
Atrial Fibrilation	18
Heart Failure	24
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	5
Cancer	48

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2016 were hospital care, inpatient care, minimally invasive procedures and chemotherapy.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	216
blood draw	170
chemotherapy	216
doctor visit	918
hospital care	280
inpatient care	280
lab tests	140
minimally invasive procedures	242
port flush	44

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	165
Female	246

**Ethnicity**
Non-Hispanic White	325
Black	0
Hispanic	26
Asian	38
Other	0
Native American	0

**Age**
From 65 to 74	158
From 75 to 84	168
85 and over	74
Less than 65	11

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2016

Hypertension	70
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	27
Depression	17
Chronic Kidney Disease	39
Asthma	20
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	23
Chronic Obstructive Pulmonary Disease	17
Diabetes	22
Dementia	6
Cancer	44

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2017 were hospital care, inpatient care, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	191
blood draw	171
chemotherapy	191
doctor visit	843
hospital care	199
inpatient care	199
lab tests	116
minimally invasive procedures	191
port flush	34

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	153
Female	220

**Ethnicity**
Non-Hispanic White	290
Black	0
Hispanic	25
Asian	34
Other	0
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	157
85 and over	61
Less than 65	13

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2017

Hypertension	71
High Cholesterol	49
Stroke	4
Ischemic Heart Disease	26
Depression	20
Chronic Kidney Disease	40
Asthma	9
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	20
Chronic Obstructive Pulmonary Disease	14
Diabetes	25
Dementia	8
Cancer	43

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2018 were minimally invasive procedures, chemotherapy, biological response modifier (BRM) therapy and blood draw.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	317
blood draw	210
chemotherapy	317
doctor visit	954
hospital care	208
inpatient care	208
lab tests	191
minimally invasive procedures	340
port flush	47

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	177
Female	236

**Ethnicity**
Non-Hispanic White	303
Black	0
Hispanic	30
Asian	49
Other	0
Native American	0

**Age**
From 65 to 74	160
From 75 to 84	181
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2018

Hypertension	70
High Cholesterol	59
Stroke	6
Ischemic Heart Disease	28
Depression	20
Chronic Kidney Disease	40
Asthma	11
Osteoperosis	11
Atrial Fibrilation	16
Heart Failure	23
Chronic Obstructive Pulmonary Disease	18
Diabetes	27
Dementia	10
Cancer	44

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2019 were blood draw, minimally invasive procedures, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	254
blood draw	299
chemotherapy	254
doctor visit	1085
hospital care	228
inpatient care	228
lab tests	246
minimally invasive procedures	281
port flush	73

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	209
Female	255

**Ethnicity**
Non-Hispanic White	340
Black	0
Hispanic	39
Asian	50
Other	0
Native American	0

**Age**
From 65 to 74	167
From 75 to 84	199
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2019

Hypertension	71
High Cholesterol	59
Stroke	5
Ischemic Heart Disease	32
Depression	15
Chronic Kidney Disease	42
Asthma	10
Osteoperosis	13
Atrial Fibrilation	19
Heart Failure	24
Chronic Obstructive Pulmonary Disease	17
Diabetes	27
Dementia	10
Cancer	39

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2020 were chemotherapy, biological response modifier (BRM) therapy, minimally invasive procedures and hospital care.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	248
chemotherapy	248
doctor visit	822
hospital care	165
inpatient care	165
minimally invasive procedures	248
port flush	38

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	148
Female	209

**Ethnicity**
Non-Hispanic White	256
Black	0
Hispanic	30
Asian	45
Other	0
Native American	0

**Age**
From 65 to 74	146
From 75 to 84	142
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2020

Hypertension	68
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	29
Depression	16
Chronic Kidney Disease	37
Asthma	9
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	24
Chronic Obstructive Pulmonary Disease	13
Diabetes	24
Dementia	8
Cancer	33

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2021 were minimally invasive procedures, chemotherapy, biological response modifier (BRM) therapy and hospital care.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	402
chemotherapy	402
doctor visit	948
hospital care	209
inpatient care	209
minimally invasive procedures	433
port flush	45

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	155
Female	220

**Ethnicity**
Non-Hispanic White	265
Black	0
Hispanic	29
Asian	48
Other	0
Native American	0

**Age**
From 65 to 74	144
From 75 to 84	155
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2021

Hypertension	66
High Cholesterol	63
Stroke	3
Ischemic Heart Disease	29
Depression	15
Chronic Kidney Disease	42
Asthma	7
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	24
Chronic Obstructive Pulmonary Disease	14
Diabetes	28
Dementia	9
Cancer	31

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA during 2022 were minimally invasive procedures, chemotherapy, biological response modifier (BRM) therapy and hospital care.

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

biological response modifier (BRM) therapy	368
chemotherapy	368
doctor visit	1083
hospital care	220
inpatient care	220
minimally invasive procedures	386

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	165
Female	261

**Ethnicity**
Non-Hispanic White	303
Black	0
Hispanic	30
Asian	54
Other	0
Native American	0

**Age**
From 65 to 74	138
From 75 to 84	188
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2022

Hypertension	75
High Cholesterol	74
Stroke	6
Ischemic Heart Disease	25
Depression	14
Chronic Kidney Disease	32
Asthma	11
Osteoperosis	17
Atrial Fibrilation	23
Heart Failure	23
Chronic Obstructive Pulmonary Disease	15
Diabetes	25
Dementia	6
Cancer	41

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology for Medicare patients.

The highest averages for the top procedures that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated as a general practitioner in San Mateo, CA were minimally invasive procedures, chemotherapy, biological response modifier (BRM) therapy and hospital care.

aspiration	11
biological response modifier (BRM) therapy	271
blood draw	232
bone marrow tests	22
chemotherapy	271
diagnostic procedures	11
doctor visit	915
hospital care	236
inpatient care	236
lab tests	200
minimally invasive procedures	293
nursing home care	28

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology.

**Gender**
Male	164
Female	239

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	41
Non-Hispanic White	306
Hispanic	28
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	166
85 and over	36
Less than 65	7
65 to 74	154

Average of Total of Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology treated were hypertension, high cholesterol, cancer and chronic kidney disease.

Hypertension	63
High Cholesterol	53
Stroke	5
Ischemic Heart Disease	26
Depression	14
Chronic Kidney Disease	34
Asthma	10
Osteoporosis	10
Heart Failure	22
Chronic Obstructive Pulmonary Disease	14
Diabetes	23
Atrial Fibrillation	15
Cancer	38
Dementia	6

Education & Training

Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology graduated from University of California, Davis, School of Medicine. She completed residency at University of California, Davis Affiliated Hospitals. She is certified by the American Board of Internal Medicine, Internal Medicine and has a state license in California.

Medical School: University of California, Davis, School of Medicine

Residency: University of California, Davis Affiliated Hospitals

Board Certification: American Board of Internal Medicine, Internal Medicine

Licensed In: California

Affiliations & Hospitals

Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology is associated with these hospitals and organizations:

Sequoia Hospital

UCSF Medical Group

Sutter Health

Dignity Health

Brown and Toland Physicians

UCSF Health

Hill Physicians

Cancer Center San Mateo

Sequoia Hospital District

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. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology appears to accept the following insurance providers: Cigna, Aetna, Anthem Blue Cross of California, Blue Shield of California, Anthem, UnitedHealthcare, Medicare Advantage, United Healthcare, Health Net, Accepted Aetna Plans: Aetna Value Network HMO (AVN), Central Health Plan, CCHP Health Plan (Chinese Community Health Plan), Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO, Canopy Health and Accepted Health Net Plans: ELECT Open Access POS, Large and Small Group: ELECT POS, Large and Small Group: Health Net HMO: Large Group (101+ employees) & Small Group (2-100 employees): Health Net....

Insurance Accepted by Provider includes:

According to our sources, Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology accepts the following insurance providers:

Cigna

Aetna

Anthem Blue Cross of California

Blue Shield of California

Anthem

UnitedHealthcare

Medicare Advantage

United Healthcare

Health Net

Accepted Aetna Plans: Aetna Value Network HMO (AVN)

Central Health Plan

CCHP Health Plan (Chinese Community Health Plan)

Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO

Canopy Health

Accepted Health Net Plans: ELECT Open Access POS, Large and Small Group: ELECT POS, Large and Small Group: Health Net HMO: Large Group (101+ employees) & Small Group (2-100 employees): Health Net...

Ratings & Reviews

Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology has an exceptional overall rating with an average of 5.0 out of 5 stars based on 921 ratings. We collect ratings and reviews of Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology from all over the web to help you find the right in San Mateo, CA.

Overall Rating

(921 Ratings)

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Reviews From Around The Web

Overall Rating: 5.0 2025-04-19

Patient verified via Press Ganey

Dr Chee answered all of my questions and addressed all of my concerns. She showed that my health and care were very important to her.

Overall Rating: 5.0 2026-01-24

Patient verified via Press Ganey

Dr. Chee is such a wonderful listener and communicator. She always uplifts me with her warmth and way she provides clear options.

Overall Rating: 5.0 2025-03-06

Patient verified via Press Ganey

I Love Dr Chee. She's always so thorough, takes all the time needed for my appointments, and always has such a great attitude!

Overall Rating: 5.0 2025-08-21

Patient verified via Press Ganey

Dr. Chee is a blessing. Always attentive and always makes effort to change anything to make me better.

Overall Rating: 5.0 2025-03-14

Patient verified via Press Ganey

Dr. Chee is amazing. She's got a great bedside manner, is smart, listens, and seems to truly care.

Overall Rating: 5.0 2025-07-13

Patient verified via Press Ganey

Dr Chee is the best! Explains a lot to help me understand my blood tests and everything else

Overall Rating: 5.0 2025-09-17

Patient verified via Press Ganey

Dr. Karen Chee is exceptional. I feel very comfortable and confident being treated by her.

Overall Rating: 5.0 2025-06-13

Patient verified via Press Ganey

I am grateful to have Dr. Chee as my oncologist.

Overall Rating: 5.0 2025-07-18

Patient verified via Press Ganey

EXCELENT PATIENT SERVICE

Overall Rating: 5.0 2025-11-20

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Dr Chee is the best!

General Payments

These charts describe general payments received by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Celgene Corporation	$905 Revlimid $398	Abraxane $169	Istodax $22	Pomalyst $15	$301
McKesson Specialty Care Distribution Corp.	$297 $297
Janssen Biotech, Inc.	$270 IMBRUVICA $116	DARZALEX $74	ZYTIGA $25	YONDELIS $25	XARELTO $19	Other $11
E.R. Squibb & Sons, L.L.C.	$265 OPDIVO $67	YERVOY $42	ERBITUX $38	EMPLICITI $20	SPRYCEL $20	Other $78
Pfizer Inc.	$236 IBRANCE $122	INLYTA $44	LORBRENA $27	Relistor $16	XALKORI $14	Other $13
Other	$2,331 ADCETRIS $211	Kyprolis $150	JEVTANA $119	IMBRUVICA $115	SOLIRIS $105	Other $1,631

**Types of Payments**
Food and Beverage	$3,509
Education	$497
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$297

Research Payments

Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology has received 2 research payments totaling $26,993.

Biography

Dr. Karen Chee's areas of specialization are general practice, adult oncology, and medical oncology. Areas of expertise for Dr. Chee include bladder cancer, colon cancer, and clinical trials. Her professional affiliations include UCSF Medical Group, Sequoia Hospital, and Brown and Toland Physicians. Dr. Chee obtained her medical school training at the University of California, Davis, School of Medicine and performed her residency at a hospital affiliated with the University of California, Davis. She is rated highly by her patients. She can take Blue Shield, Health Net, Anthem, and more. Dr. Chee's practice in San Mateo, CA is open to new patients as reported by Doctor.com.

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Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology

Office Locations

Some issues Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology can help you with:

Noteworthy Medicare Patient Procedures Performed by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2023

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

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2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2013

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2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2014

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2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2015

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2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2016

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2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2017

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2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2018

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2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2019

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Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2020

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Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2021

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2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Karen G. Chee, MD, Hematology Oncology | Gastrointestinal Medical Oncology From 2012 - 2022

Education & Training

Affiliations & Hospitals

Insurance Information

Ratings & Reviews

General Payments

Research Payments

Biography

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