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Home > CA Providers > Radiation Oncologists

Dr. Peter K. Sien, MD

Accepting New Patients

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Specializes in: Radiation Oncology

Medical College of Wisconsin (1975)

7379 W Deschutes Avenue Suite 100
Kennewick, WA 99336

(509) 987-1800

Dr. Peter K. Sien, MD is a radiation oncologist in Modesto, CA specializing in radiation oncology. He graduated from Medical College of Wisconsin in 1975 and has 51 years of experience. Dr. Peter K. Sien, MD is affiliated with Central Valley Medical Group, OLYMPIC MEDICAL PHYSICIANS, NORTHWEST CANCER CARE ASSOCIATES PC and CENTRAL WASHINGTON HEALTH SERVICES ASSOCIATION.

Office Locations

Central Valley Medical Group

1316 Nelson Avenue 21st Century Oncology of California
Modesto, CA 95350

(209) 575-5872

open_in_new

625 N 6th Street
Phoenix, AZ 85004

(602) 406-8222

open_in_new

7379 W Deschutes Avenue Suite 100
Kennewick, WA 99336

(509) 987-1800

(509) 987-1808

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844 N 5th Avenue
Sequim, WA 98382

(360) 683-9895

(360) 582-5614

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Peter K. Sien, MD treated as a radiation oncologist in Modesto, CA during 2012 were radiation therapy.

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	571
radiation therapy	1865

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Peter K. Sien, MD treated as a radiation oncologist in Modesto, CA during 2013 were radiation therapy, hospital care and inpatient care.

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	549
hospital care	14
inpatient care	14
radiation therapy	1765

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	85
Female	106

**Ethnicity**
Non-Hispanic White	131
Black	0
Hispanic	41
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	48
85 and over	23
Less than 65	32

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2013

Hypertension	66
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	29
Depression	11
Chronic Kidney Disease	28
Asthma	0
Osteoperosis	6
Atrial Fibrilation	6
Heart Failure	14
Chronic Obstructive Pulmonary Disease	15
Diabetes	43
Dementia	8
Cancer	66

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Peter K. Sien, MD treated as a radiation oncologist in Modesto, CA during 2014 were radiation therapy.

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	507
radiation therapy	1690

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	93
Female	87

**Ethnicity**
Non-Hispanic White	130
Black	0
Hispanic	28
Asian	11
Other	0
Native American	0

**Age**
From 65 to 74	84
From 75 to 84	56
85 and over	19
Less than 65	21

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2014

Hypertension	64
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	29
Depression	15
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	8
Atrial Fibrilation	12
Heart Failure	14
Chronic Obstructive Pulmonary Disease	18
Diabetes	42
Dementia	6
Cancer	69

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Peter K. Sien, MD treated as a radiation oncologist in Modesto, CA during 2015 were radiation therapy.

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	387
radiation therapy	835

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	128
Female	182

**Ethnicity**
Non-Hispanic White	222
Black	0
Hispanic	56
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	148
From 75 to 84	106
85 and over	26
Less than 65	30

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2015

Hypertension	66
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	33
Depression	15
Chronic Kidney Disease	31
Asthma	9
Osteoperosis	8
Atrial Fibrilation	7
Heart Failure	12
Chronic Obstructive Pulmonary Disease	13
Diabetes	37
Dementia	0
Cancer	71

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Peter K. Sien, MD treated as a radiation oncologist in Modesto, CA during 2016 were radiation therapy.

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	104
radiation therapy	189

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	33
Female	39

**Ethnicity**
Non-Hispanic White	57
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	25
From 75 to 84	25
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2016

Hypertension	68
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	47
Depression	24
Chronic Kidney Disease	38
Asthma	32
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	21
Chronic Obstructive Pulmonary Disease	26
Diabetes	29
Dementia	0
Cancer	74

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	68

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	15
Female	14

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2017

Hypertension	72
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	38
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	108

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	80
Female	49

**Ethnicity**
Non-Hispanic White	109
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	70
From 75 to 84	41
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2018

Hypertension	75
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	29
Depression	19
Chronic Kidney Disease	38
Asthma	0
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	22
Diabetes	29
Dementia	10
Cancer	72

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	126

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	99
Female	80

**Ethnicity**
Non-Hispanic White	152
Black	0
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	91
From 75 to 84	47
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2019

Hypertension	67
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	31
Depression	22
Chronic Kidney Disease	38
Asthma	6
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	18
Chronic Obstructive Pulmonary Disease	18
Diabetes	34
Dementia	12
Cancer	65

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	160

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	109
Female	52

**Ethnicity**
Non-Hispanic White	141
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	80
From 75 to 84	54
85 and over	16
Less than 65	11

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2020

Hypertension	58
High Cholesterol	47
Stroke	7
Ischemic Heart Disease	27
Depression	16
Chronic Kidney Disease	39
Asthma	0
Osteoperosis	0
Atrial Fibrilation	8
Heart Failure	15
Chronic Obstructive Pulmonary Disease	17
Diabetes	35
Dementia	12
Cancer	64

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	97

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	117
Female	49

**Ethnicity**
Non-Hispanic White	147
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	87
From 75 to 84	58
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2021

Hypertension	71
High Cholesterol	55
Stroke	7
Ischemic Heart Disease	32
Depression	17
Chronic Kidney Disease	37
Asthma	0
Osteoperosis	7
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	14
Diabetes	36
Dementia	8
Cancer	70

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

doctor visit	99

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	92
Female	43

**Ethnicity**
Non-Hispanic White	115
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	63
From 75 to 84	54
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2022

Hypertension	70
High Cholesterol	72
Stroke	11
Ischemic Heart Disease	23
Depression	9
Chronic Kidney Disease	27
Asthma	0
Osteoperosis	15
Atrial Fibrilation	19
Heart Failure	10
Chronic Obstructive Pulmonary Disease	18
Diabetes	39
Dementia	0
Cancer	71

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Peter K. Sien, MD for Medicare patients.

The highest averages for the top procedures that Dr. Peter K. Sien, MD treated as a radiation oncologist in Modesto, CA were radiation therapy, hospital care and inpatient care.

doctor visit	252
hospital care	14
inpatient care	14
radiation therapy	1268

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Peter K. Sien, MD.

**Gender**
Male	77
Female	63

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	1
Non-Hispanic White	109
Native American / Alaskan Native	0
Hispanic	12
Other	0

**Age**
75 to 84	44
85 and over	7
Less than 65	8
65 to 74	66

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

The highest averages of the most common conditions of Medicare patients that Dr. Peter K. Sien, MD treated were cancer, hypertension, high cholesterol and diabetes.

Hypertension	61
High Cholesterol	49
Stroke	2
Ischemic Heart Disease	28
Depression	13
Chronic Kidney Disease	27
Asthma	4
Osteoporosis	4
Heart Failure	11
Chronic Obstructive Pulmonary Disease	14
Diabetes	29
Atrial Fibrillation	7
Dementia	5
Cancer	63

Education & Training

Dr. Peter K. Sien, MD graduated from Medical College of Wisconsin in 1975. He has a state license in Arizona.

Medical School: Medical College of Wisconsin (1975)

Licensed In: Arizona

Affiliations & Hospitals

Dr. Peter K. Sien, MD is associated with these hospitals and organizations:

Central Valley Medical Group

OLYMPIC MEDICAL PHYSICIANS

NORTHWEST CANCER CARE ASSOCIATES PC

CENTRAL WASHINGTON HEALTH SERVICES ASSOCIATION

Ratings & Reviews

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General Payments

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

**Payments by Company**
E.R. Squibb & Sons, L.L.C.	$343 OPDIVO $237	ERBITUX $64	SPRYCEL $43
Genentech USA, Inc.	$212 Kadcyla $81	Gazyva $47	$84
Celgene Corporation	$104 $104
Novartis Pharmaceuticals Corporation	$97 NON BRAND $97
Abbott Laboratories	$95 Molecular Diagnostics $95
Other	$574 XARELTO $95	SGN35 $94	SpaceOAR $78	Axumin $72	ORGOVYX $56	Other $179

**Types of Payments**
Food and Beverage	$1,425

Ownership and Interest Payments

This table describes ownership payments received by Dr. Peter K. Sien, MD.

DARA Biosciences, Inc.

2014

$0.00

Physician Covered Recipient

None

Biography

Dr. Peter Sien is a specialist in radiation oncology. He attended medical school at Medical College of Wisconsin. Dr. Sien is professionally affiliated with Central Valley Medical Group. Central Valley Medical Group reports that he is accepting new patients at his office in Modesto, CA.

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Dr. Peter K. Sien, MD

Office Locations

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. Peter K. Sien, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter K. Sien, MD 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. Peter K. Sien, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Ownership and Interest Payments

Biography

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