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Dr. Helen K. Chen, MD

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Specializes in: Radiation Oncology

University of California, San Francisco (UCSF), School of Medicine (1989)

209 Fair Oaks Avenue
South Pasadena, CA 91030

1-877-998-7546

Dr. Helen K. Chen, MD is a radiation oncologist in South Pasadena, CA specializing in radiation oncology. She graduated from University of California, San Francisco (UCSF), School of Medicine in 1989 and has 37 years of experience. Dr. Helen K. Chen, MD is affiliated with CITY OF HOPE MEDICAL FOUNDATION.

Office Locations

209 Fair Oaks Avenue
South Pasadena, CA 91030

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Noteworthy Medicare Patient Procedures Performed by Dr. Helen K. Chen, MD in 2023

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

Top 25%

By Volume:

external beam radiation therapy

image guided procedures

By Affordability:

stereotactic body radiation therapy

stereotactic radiosurgery

In 2012, among providers in related specialties within California, Dr. Helen K. Chen, MD performed more external beam radiation therapy (EBRT), and image guided procedures procedures for Medicare patients than 75% of them and she also had a list price for stereotactic body radiation therapy (SBRT), and stereotactic radiosurgery (SRS) that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2012 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	422
radiation therapy	1771

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2013 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	352
radiation therapy	1389

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	24
Female	56

**Ethnicity**
Non-Hispanic White	50
Black	0
Hispanic	0
Asian	11
Other	0
Native American	0

**Age**
From 65 to 74	36
From 75 to 84	28
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2013

Hypertension	59
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	33
Depression	24
Chronic Kidney Disease	24
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	15
Diabetes	36
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2014 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	372
radiation therapy	1507

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	38
Female	61

**Ethnicity**
Non-Hispanic White	55
Black	0
Hispanic	17
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	48
From 75 to 84	30
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2014

Hypertension	67
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	32
Depression	17
Chronic Kidney Disease	25
Asthma	0
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	17
Chronic Obstructive Pulmonary Disease	16
Diabetes	31
Dementia	0
Cancer	72

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2015 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	464
radiation therapy	942

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	104
Female	118

**Ethnicity**
Non-Hispanic White	126
Black	0
Hispanic	48
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	66
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2015

Hypertension	68
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	32
Depression	22
Chronic Kidney Disease	29
Asthma	14
Osteoperosis	12
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	15
Diabetes	37
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2016 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	338
radiation therapy	1032

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	29
Female	61

**Ethnicity**
Non-Hispanic White	50
Black	0
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	44
From 75 to 84	33
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2016

Hypertension	68
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	40
Depression	21
Chronic Kidney Disease	20
Asthma	19
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	17
Diabetes	22
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2017 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	363
radiation therapy	694

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	56
Female	57

**Ethnicity**
Non-Hispanic White	48
Black	0
Hispanic	20
Asian	27
Other	0
Native American	0

**Age**
From 65 to 74	72
From 75 to 84	19
85 and over	11
Less than 65	11

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2017

Hypertension	74
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	43
Depression	24
Chronic Kidney Disease	33
Asthma	10
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	21
Chronic Obstructive Pulmonary Disease	24
Diabetes	32
Dementia	11
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2018 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	420
radiation therapy	444

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	56
Female	42

**Ethnicity**
Non-Hispanic White	49
Black	0
Hispanic	0
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	56
From 75 to 84	26
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2018

Hypertension	65
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	31
Depression	26
Chronic Kidney Disease	33
Asthma	0
Osteoperosis	14
Atrial Fibrilation	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	15
Diabetes	35
Dementia	13
Cancer	73

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2019 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	293
radiation therapy	251

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	68
Female	35

**Ethnicity**
Non-Hispanic White	50
Black	0
Hispanic	20
Asian	19
Other	0
Native American	0

**Age**
From 65 to 74	57
From 75 to 84	22
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2019

Hypertension	73
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	44
Depression	17
Chronic Kidney Disease	37
Asthma	0
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	18
Chronic Obstructive Pulmonary Disease	0
Diabetes	38
Dementia	12
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2020 were radiation therapy.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	151
radiation therapy	180

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	48
Female	36

**Ethnicity**
Non-Hispanic White	38
Black	0
Hispanic	0
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	41
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2020

Hypertension	65
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	43
Depression	20
Chronic Kidney Disease	32
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	20
Chronic Obstructive Pulmonary Disease	18
Diabetes	37
Dementia	15
Cancer	75

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2021 were radiation therapy and image guided procedures.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	271
image guided procedures	27
radiation therapy	244

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	48
Female	53

**Ethnicity**
Non-Hispanic White	43
Black	0
Hispanic	0
Asian	35
Other	0
Native American	0

**Age**
From 65 to 74	43
From 75 to 84	38
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2021

Hypertension	60
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	41
Depression	21
Chronic Kidney Disease	40
Asthma	13
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	21
Chronic Obstructive Pulmonary Disease	16
Diabetes	31
Dementia	14
Cancer	70

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA during 2022 were radiation therapy and image guided procedures.

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

doctor visit	483
image guided procedures	52
radiation therapy	524

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	88
Female	70

**Ethnicity**
Non-Hispanic White	75
Black	0
Hispanic	25
Asian	43
Other	0
Native American	0

**Age**
From 65 to 74	71
From 75 to 84	59
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Helen K. Chen, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	30
Depression	20
Chronic Kidney Disease	32
Asthma	11
Osteoperosis	17
Atrial Fibrilation	18
Heart Failure	15
Chronic Obstructive Pulmonary Disease	23
Diabetes	40
Dementia	11
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Helen K. Chen, MD for Medicare patients.

The highest averages for the top procedures that Dr. Helen K. Chen, MD treated as a radiation oncologist in South Pasadena, CA were radiation therapy and image guided procedures.

doctor visit	357
image guided procedures	39
radiation therapy	816

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Helen K. Chen, MD.

**Gender**
Male	50
Female	53

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	18
Non-Hispanic White	53
Native American / Alaskan Native	0
Hispanic	13
Other	0

**Age**
75 to 84	31
85 and over	1
Less than 65	1
65 to 74	52

Average of Total of Conditions of Medicare patients treated by Dr. Helen K. Chen, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Helen K. Chen, MD treated were cancer, hypertension, high cholesterol and ischemic heart disease.

Hypertension	61
High Cholesterol	49
Stroke	1
Ischemic Heart Disease	33
Depression	19
Chronic Kidney Disease	27
Asthma	6
Osteoporosis	8
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	30
Atrial Fibrillation	8
Dementia	6
Cancer	67

Education & Training

Dr. Helen K. Chen, MD graduated from University of California, San Francisco (UCSF), School of Medicine in 1989. She has a state license in California.

Medical School: University of California, San Francisco (UCSF), School of Medicine (1989)

Licensed In: California

Affiliations & Hospitals

Dr. Helen K. Chen, MD is associated with these hospitals and organizations:

CITY OF HOPE MEDICAL FOUNDATION

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General Payments

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

**Payments by Company**
Novocure Inc.	$1,048 Oncology $1,048
E.R. Squibb & Sons, L.L.C.	$233 OPDIVO $201	ERBITUX $11	$21
Bayer HealthCare Pharmaceuticals Inc.	$228 Xofigo $175	Vitrakvi $22	Aliqopa $15	Stivarga $15
Genentech USA, Inc.	$186 Avastin $163	Kadcyla $22
AstraZeneca Pharmaceuticals LP	$141 LYNPARZA $124	TAGRISSO $16
Other	$1,127 SUBSYS $135	LINZESS $121	IBRANCE $112	INVOKANA $105	KEYTRUDA $96	Other $558

**Types of Payments**
Food and Beverage	$1,915
Consulting Fee	$1,048

Biography

Dr. Helen Chen is a radiation oncology specialist in Duarte, CA and South Pasadena, CA. Her practice in South Pasadena, CA is open to new patients as reported by Doctor.com. She studied medicine at the University of California, San Francisco (UCSF), School of Medicine.