Procedure Volume Patient Data Patient Conditions Reviews General Payments Back to Top

Home > CA Providers

Dr. Billy W. Loo Jr, MD, PhD, FASTRO

(No ratings)

Specializes in: Radiation Oncology

University of California, Davis, School of Medicine

Professional interests include: radiation therapy, stereotactic radiosurgery (SRS), thoracic cancer, and more.

875 Blake Wilbur Drive
Stanford, CA 94305

(650) 736-7143

Dr. Billy W. Loo Jr, MD, PhD, FASTRO is a radiation oncologist in Stanford, CA specializing in radiation oncology. He graduated from University of California, Davis, School of Medicine. Dr. Billy W. Loo Jr, MD, PhD, FASTRO is affiliated with Stanford Medicine Children's Health and Stanford Health Care.

Office Locations

875 Blake Wilbur Drive
Stanford, CA 94305

(650) 736-7143

open_in_new

875 Blake Wilbur Drive Radiation Oncology at Blake Wilbur Building
Palo Alto, CA 94304

open_in_new

In The News

“"The advantage of proton therapy is that it allows us to concentrate radiation dose in tumors, and less in the surrounding normal organs," said Dr. Billy Loo of Stanford Medicine.”—"Stanford Medicine Cancer Center to launch proton therapy system for targeted cancer treatment", ABC7 News, April 2026

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2012 were radiation therapy, minimally invasive procedures and laryngeal (voice box) procedures.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	351
laryngeal (voice box) procedures	18
minimally invasive procedures	18
radiation therapy	51

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2013 were radiation therapy.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	299
radiation therapy	37

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	81
Female	59

**Ethnicity**
Non-Hispanic White	97
Black	0
Hispanic	0
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	60
From 75 to 84	51
85 and over	12
Less than 65	17

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2013

Hypertension	63
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	39
Depression	21
Chronic Kidney Disease	26
Asthma	10
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	24
Chronic Obstructive Pulmonary Disease	31
Diabetes	20
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2014 were radiation therapy.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	258
radiation therapy	36

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	68
Female	58

**Ethnicity**
Non-Hispanic White	89
Black	0
Hispanic	0
Asian	23
Other	0
Native American	0

**Age**
From 65 to 74	51
From 75 to 84	55
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2014

Hypertension	60
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	47
Depression	20
Chronic Kidney Disease	23
Asthma	10
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	19
Chronic Obstructive Pulmonary Disease	44
Diabetes	21
Dementia	10
Cancer	75

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	202

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	102
Female	114

**Ethnicity**
Non-Hispanic White	156
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	82
From 75 to 84	80
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2015

Hypertension	60
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	49
Depression	14
Chronic Kidney Disease	22
Asthma	27
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	20
Chronic Obstructive Pulmonary Disease	43
Diabetes	27
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2016 were radiation therapy.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	304
radiation therapy	35

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	51
Female	69

**Ethnicity**
Non-Hispanic White	87
Black	0
Hispanic	0
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	45
From 75 to 84	51
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2016

Hypertension	59
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	46
Depression	14
Chronic Kidney Disease	29
Asthma	34
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	43
Diabetes	27
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2017 were radiation therapy.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	367
radiation therapy	49

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	88
Female	102

**Ethnicity**
Non-Hispanic White	138
Black	0
Hispanic	0
Asian	32
Other	0
Native American	0

**Age**
From 65 to 74	91
From 75 to 84	72
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2017

Hypertension	63
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	37
Depression	17
Chronic Kidney Disease	27
Asthma	9
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	18
Chronic Obstructive Pulmonary Disease	36
Diabetes	24
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2018 were radiation therapy.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	376
radiation therapy	55

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	115
Female	97

**Ethnicity**
Non-Hispanic White	146
Black	0
Hispanic	13
Asian	41
Other	0
Native American	0

**Age**
From 65 to 74	94
From 75 to 84	79
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2018

Hypertension	63
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	39
Depression	18
Chronic Kidney Disease	33
Asthma	8
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	22
Chronic Obstructive Pulmonary Disease	29
Diabetes	23
Dementia	10
Cancer	75

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA during 2019 were radiation therapy.

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	299
radiation therapy	40

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	93
Female	98

**Ethnicity**
Non-Hispanic White	119
Black	0
Hispanic	13
Asian	43
Other	0
Native American	0

**Age**
From 65 to 74	98
From 75 to 84	62
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2019

Hypertension	63
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	41
Depression	21
Chronic Kidney Disease	28
Asthma	7
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	18
Chronic Obstructive Pulmonary Disease	0
Diabetes	21
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	78

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	57
Female	66

**Ethnicity**
Non-Hispanic White	80
Black	0
Hispanic	0
Asian	27
Other	0
Native American	0

**Age**
From 65 to 74	55
From 75 to 84	46
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2020

Hypertension	52
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	28
Depression	20
Chronic Kidney Disease	28
Asthma	0
Osteoperosis	13
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	21
Diabetes	18
Dementia	10
Cancer	73

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	149

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	55
Female	57

**Ethnicity**
Non-Hispanic White	72
Black	0
Hispanic	0
Asian	28
Other	0
Native American	0

**Age**
From 65 to 74	47
From 75 to 84	40
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2021

Hypertension	61
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	41
Depression	17
Chronic Kidney Disease	31
Asthma	0
Osteoperosis	12
Atrial Fibrilation	0
Heart Failure	19
Chronic Obstructive Pulmonary Disease	24
Diabetes	25
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

doctor visit	160

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	69
Female	65

**Ethnicity**
Non-Hispanic White	84
Black	0
Hispanic	0
Asian	33
Other	0
Native American	0

**Age**
From 65 to 74	48
From 75 to 84	61
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2022

Hypertension	70
High Cholesterol	70
Stroke	8
Ischemic Heart Disease	35
Depression	9
Chronic Kidney Disease	20
Asthma	8
Osteoperosis	15
Atrial Fibrilation	19
Heart Failure	20
Chronic Obstructive Pulmonary Disease	26
Diabetes	19
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Billy W. Loo Jr, MD, PhD, FASTRO for Medicare patients.

The highest averages for the top procedures that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated as a radiation oncologist in Stanford, CA were radiation therapy, minimally invasive procedures and laryngeal (voice box) procedures.

doctor visit	258
laryngeal (voice box) procedures	18
minimally invasive procedures	18
radiation therapy	43

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO.

**Gender**
Male	70
Female	71

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	25
Non-Hispanic White	97
Native American / Alaskan Native	0
Hispanic	2
Other	0

**Age**
75 to 84	54
85 and over	1
Less than 65	1
65 to 74	61

Average of Total of Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Billy W. Loo Jr, MD, PhD, FASTRO treated were cancer, hypertension, high cholesterol and ischemic heart disease.

Hypertension	55
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	36
Depression	15
Chronic Kidney Disease	24
Asthma	10
Osteoporosis	7
Heart Failure	17
Chronic Obstructive Pulmonary Disease	27
Diabetes	20
Atrial Fibrillation	10
Dementia	4
Cancer	68

Education & Training

Dr. Billy W. Loo Jr, MD, PhD, FASTRO graduated from University of California, Davis, School of Medicine. He completed residency at Stanford University Medical Center. He is certified by the Radiation Oncology, American Board of Radiology and has a state license in California.

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

Residency: Stanford University Medical Center

Board Certification: Radiation Oncology, American Board of Radiology (2006)

Licensed In: California

Affiliations & Hospitals

Dr. Billy W. Loo Jr, MD, PhD, FASTRO is associated with these hospitals and organizations:

Stanford Medicine Children's Health

Stanford Health Care

Ratings & Reviews

Dr. Billy W. Loo Jr, MD, PhD, FASTRO does not have any reviews yet, be the first to leave a review of Dr. Billy W. Loo Jr, MD, PhD, FASTRO here: Leave a Review

(No ratings)

Leave a Review

General Payments

These charts describe general payments received by Dr. Billy W. Loo Jr, MD, PhD, FASTRO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Varian Medical Systems, Inc.	$10,903 Edge $6,000	TrueBeam $4,784	$119
Mevion_Medical_Systems_Inc	$2,826 PTS250 $2,826
Millennium Pharmaceuticals, Inc.	$1,895 $1,895
Novocure Inc.	$685 $685
Merck Sharp & Dohme Corporation	$632 $632
Other	$431 REFLEXION MEDICAL RADIOTHERAPY SYSTEM $166	TECENTRIQ $116	Bravos Afterloader System $62	ELEKTA UNITY $24	$63

**Types of Payments**
Honoraria	$7,500
Travel and Lodging	$6,281
Compensation for serving as faculty or as a speaker for a non-accredited and noncertified continuing education program	$1,500
Food and Beverage	$905
Consulting Fee	$685
Other	$500

Research Payments

Dr. Billy W. Loo Jr, MD, PhD, FASTRO has received 7 research payments totaling $621,496.

Biography

Dr. Billy Loo is a specialist in radiation oncology. Dr. Loo has a special interest in stereotactic radiosurgery (SRS) and non-small cell lung cancer. He graduated from the University of California, Davis, School of Medicine. He completed his residency training at Kaiser Permanente Oakland Medical Center, Kaiser Permanente San Francisco Medical Center, and Stanford University Medical Center. Dr. Loo has received professional recognition including the following: Basic Science Travel Grant, ASTRO; Catalyst Award - AVATAR project, Stanford Medicine Catalyst; and Educator of the Year Award, Association of Residents in Radiation Oncology. He is affiliated with Stanford Medicine Children's Health and Stanford Health Care.

Select Year:

Dr. Billy W. Loo Jr, MD, PhD, FASTRO

Office Locations

In The News

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Billy W. Loo Jr, MD, PhD, FASTRO 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. Billy W. Loo Jr, MD, PhD, FASTRO From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Research Payments

Biography

Other Providers in Stanford, CA