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Dr. Peter Sebastian Masny, MD

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Specializes in: Vascular Neurology

850 Fair Oaks Avenue Suite 220
Arroyo Grande, CA 93420

(805) 547-2224

Dr. Peter Sebastian Masny, MD is a vascular neurologist in Arroyo Grande, CA specializing in vascular neurology. Dr. Peter Sebastian Masny, MD is affiliated with Pacific Central Coast Health Centers.

Office Locations

850 Fair Oaks Avenue Suite 220
Arroyo Grande, CA 93420

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Noteworthy Medicare Patient Procedures Performed by Dr. Peter Sebastian Masny, MD in 2024

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

Top 5%

By Affordability:

comatose EEG

electroencephalography

routine EEG

sleep-only EEG

In 2024, Dr. Peter Sebastian Masny, MD had a list price for comatose EEG, electroencephalography (EEG), routine EEG, and sleep-only EEG that was lower than the list prices billed to Medicare by 95% of providers in related specialties within California. 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.

Top 25%

By Affordability:

diagnostic procedures

electrodiagnostic testing

electrophysiological study

nerve conduction studies

In 2012, Dr. Peter Sebastian Masny, MD had a list price for diagnostic procedures, electrodiagnostic testing, electrophysiological (EP) study, and nerve conduction studies (NCS) that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. 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. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2012 were diagnostic procedures, hospital care, inpatient care and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	589
doctor visit	381
electroencephalography (EEG)	22
hospital care	63
inpatient care	63

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2013 were hospital care, inpatient care, diagnostic procedures and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	78
doctor visit	489
electroencephalography (EEG)	23
hospital care	121
inpatient care	121

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	167
Female	178

**Ethnicity**
Non-Hispanic White	305
Black	0
Hispanic	25
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	134
From 75 to 84	120
85 and over	62
Less than 65	29

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2013

Hypertension	72
High Cholesterol	51
Stroke	24
Ischemic Heart Disease	30
Depression	23
Chronic Kidney Disease	24
Asthma	4
Osteoperosis	9
Atrial Fibrilation	18
Heart Failure	19
Chronic Obstructive Pulmonary Disease	17
Diabetes	30
Dementia	23
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2014 were hospital care, inpatient care, diagnostic procedures and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	90
doctor visit	485
electroencephalography (EEG)	27
hospital care	107
inpatient care	107

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	171
Female	184

**Ethnicity**
Non-Hispanic White	314
Black	0
Hispanic	27
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	157
From 75 to 84	97
85 and over	58
Less than 65	43

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2014

Hypertension	68
High Cholesterol	56
Stroke	26
Ischemic Heart Disease	26
Depression	24
Chronic Kidney Disease	22
Asthma	7
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	21
Chronic Obstructive Pulmonary Disease	15
Diabetes	29
Dementia	18
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2015 were hospital care, inpatient care, diagnostic procedures and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	79
doctor visit	515
electroencephalography (EEG)	21
hospital care	128
inpatient care	128

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	338
Female	356

**Ethnicity**
Non-Hispanic White	586
Black	0
Hispanic	84
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	286
From 75 to 84	196
85 and over	114
Less than 65	98

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2015

Hypertension	67
High Cholesterol	54
Stroke	27
Ischemic Heart Disease	31
Depression	27
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	18
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2016 were hospital care, inpatient care, diagnostic procedures and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	49
doctor visit	592
electroencephalography (EEG)	14
hospital care	153
inpatient care	153

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	175
Female	187

**Ethnicity**
Non-Hispanic White	315
Black	0
Hispanic	36
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	137
From 75 to 84	117
85 and over	67
Less than 65	41

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2016

Hypertension	72
High Cholesterol	60
Stroke	35
Ischemic Heart Disease	29
Depression	30
Chronic Kidney Disease	29
Asthma	18
Osteoperosis	7
Atrial Fibrilation	16
Heart Failure	24
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	21
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2017 were hospital care, inpatient care, diagnostic procedures and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	50
doctor visit	698
electroencephalography (EEG)	13
hospital care	110
inpatient care	110

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	168
Female	219

**Ethnicity**
Non-Hispanic White	341
Black	0
Hispanic	31
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	138
85 and over	59
Less than 65	54

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2017

Hypertension	71
High Cholesterol	54
Stroke	33
Ischemic Heart Disease	32
Depression	29
Chronic Kidney Disease	30
Asthma	7
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	26
Dementia	23
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2018 were chronic care, diagnostic procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

chronic care	154
diagnostic procedures	64
doctor visit	566
hospital care	52
inpatient care	52

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	170
Female	191

**Ethnicity**
Non-Hispanic White	320
Black	0
Hispanic	30
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	140
85 and over	50
Less than 65	29

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2018

Hypertension	75
High Cholesterol	58
Stroke	22
Ischemic Heart Disease	30
Depression	32
Chronic Kidney Disease	34
Asthma	8
Osteoperosis	11
Atrial Fibrilation	20
Heart Failure	19
Chronic Obstructive Pulmonary Disease	15
Diabetes	24
Dementia	24
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2019 were chronic care, diagnostic procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

chronic care	489
diagnostic procedures	75
doctor visit	582
electroencephalography (EEG)	11
hospital care	71
inpatient care	71

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	170
Female	220

**Ethnicity**
Non-Hispanic White	333
Black	0
Hispanic	35
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	160
From 75 to 84	143
85 and over	53
Less than 65	34

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2019

Hypertension	71
High Cholesterol	63
Stroke	27
Ischemic Heart Disease	29
Depression	32
Chronic Kidney Disease	34
Asthma	9
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	15
Diabetes	28
Dementia	20
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2020 were hospital care, inpatient care, diagnostic procedures and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	35
doctor visit	516
electroencephalography (EEG)	12
hospital care	35
inpatient care	35

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	164
Female	175

**Ethnicity**
Non-Hispanic White	306
Black	0
Hispanic	22
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	132
From 75 to 84	137
85 and over	34
Less than 65	36

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2020

Hypertension	64
High Cholesterol	56
Stroke	22
Ischemic Heart Disease	30
Depression	32
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	15
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	14
Diabetes	25
Dementia	20
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2021 were diagnostic procedures, hospital care, inpatient care and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	67
doctor visit	501
electroencephalography (EEG)	11
hospital care	20
inpatient care	20

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	148
Female	157

**Ethnicity**
Non-Hispanic White	267
Black	0
Hispanic	27
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	130
From 75 to 84	124
85 and over	23
Less than 65	28

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2021

Hypertension	66
High Cholesterol	58
Stroke	18
Ischemic Heart Disease	30
Depression	29
Chronic Kidney Disease	31
Asthma	8
Osteoperosis	16
Atrial Fibrilation	13
Heart Failure	17
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Dementia	20
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2022 were diagnostic procedures, hospital care, inpatient care and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	47
doctor visit	554
electroencephalography (EEG)	15
hospital care	26
inpatient care	26

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	137
Female	198

**Ethnicity**
Non-Hispanic White	293
Black	0
Hispanic	31
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	126
From 75 to 84	135
85 and over	38
Less than 65	36

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2022

Hypertension	70
High Cholesterol	73
Stroke	24
Ischemic Heart Disease	25
Depression	30
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	20
Atrial Fibrilation	21
Heart Failure	15
Chronic Obstructive Pulmonary Disease	13
Diabetes	25
Dementia	15
Cancer	14

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2023 were diagnostic procedures, hospital care, inpatient care and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	63
doctor visit	628
electroencephalography (EEG)	14
hospital care	46
inpatient care	46

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	180
Female	192

**Ethnicity**
Non-Hispanic White	329
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	143
From 75 to 84	144
85 and over	46
Less than 65	39

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2023

Hypertension	73
High Cholesterol	75
Stroke	26
Ischemic Heart Disease	22
Depression	27
Chronic Kidney Disease	21
Asthma	10
Osteoperosis	19
Atrial Fibrilation	21
Heart Failure	12
Chronic Obstructive Pulmonary Disease	13
Diabetes	23
Dementia	15
Cancer	11

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA during 2024 were diagnostic procedures, hospital care, inpatient care and electroencephalography (EEG).

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

diagnostic procedures	81
doctor visit	659
electroencephalography (EEG)	13
hospital care	44
inpatient care	44

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	198
Female	224

**Ethnicity**
Non-Hispanic White	362
Black	0
Hispanic	34
Asian	0
Other	15
Native American	0

**Age**
From 65 to 74	150
From 75 to 84	176
85 and over	42
Less than 65	54

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2024

Hypertension	72
High Cholesterol	74
Stroke	26
Ischemic Heart Disease	23
Depression	30
Chronic Kidney Disease	24
Asthma	12
Osteoperosis	18
Atrial Fibrilation	18
Heart Failure	14
Chronic Obstructive Pulmonary Disease	17
Diabetes	19
Dementia	18
Cancer	11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Peter Sebastian Masny, MD for Medicare patients.

The highest averages for the top procedures that Dr. Peter Sebastian Masny, MD treated as a vascular neurologist in Arroyo Grande, CA were chronic care, diagnostic procedures, hospital care and inpatient care.

chronic care	321
diagnostic procedures	105
doctor visit	551
electroencephalography (EEG)	16
hospital care	75
inpatient care	75

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Peter Sebastian Masny, MD.

**Gender**
Male	168
Female	190

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	313
Hispanic	29
Native American / Alaskan Native	0
Other	1

**Age**
75 to 84	128
85 and over	49
Less than 65	40
65 to 74	141

Average of Total of Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Peter Sebastian Masny, MD treated were hypertension, high cholesterol, depression and chronic kidney disease.

Hypertension	64
High Cholesterol	56
Stroke	23
Ischemic Heart Disease	25
Depression	26
Chronic Kidney Disease	25
Asthma	8
Osteoporosis	12
Heart Failure	16
Chronic Obstructive Pulmonary Disease	12
Diabetes	23
Atrial Fibrillation	15
Cancer	10
Dementia	18

Education & Training

He has a state license in California.

Licensed In: California

Ratings & Reviews

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General Payments

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

**Payments by Company**
Biogen, Inc.	$827 TECFIDERA $673	TYSABRI $125	AVONEX $17	PLEGRIDY $12
Teva Pharmaceuticals USA, Inc.	$788 COPAXONE $217	AZILECT $185	AJOVY $115	Unclassified $111	AUSTEDO $40	Other $121
UCB, Inc.	$600 Briviact $357	Neupro $112	Vimpat $102	Rystiggo $30
Sunovion Pharmaceuticals Inc.	$567 APTIOM $567
Allergan Inc.	$550 NAMZARIC $181	NAMENDA XR $156	VRAYLAR $111	BOTOX $64	ACZONE $17	Other $21
Other	$5,384 NUPLAZID $352	Aimovig $327	TROKENDI XR $249	UBRELVY $228	AMPYRA $217	Other $4,011

**Types of Payments**
Food and Beverage	$7,955
Education	$372
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$278
Gift	$111

Biography

Dr Peter Masny is a board-certified neurologist with a neuromuscular focus, practicing at Dignity Health's Fair Oaks Speciality Center in Arroyo Grande. A dual US/Danish citizen, Dr Masny earned his Bachelor of Arts in Molecular and Cellular Biology with an emphasis on Neurobiology from the University of California, Berkeley, where he was a member of the Berkeley Honor Students' Society. He went on to earn his medical degree from the University of Copenhagen Medical School in Copenhagen, Denmark, where he was born and raised. Dr Masny completed his internship and Neurology residency at the University of Colorado Health Sciences Center, followed by a Clinical Neurophysiology Fellowship at the University of Utah with an emphasis on EMG.

Select Year:

Dr. Peter Sebastian Masny, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Peter Sebastian Masny, MD in 2024

By Affordability:

By Affordability:

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 Sebastian Masny, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Peter Sebastian Masny, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography

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