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Dr. Pedro Mariano Barros, MD

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Specializes in: Adult Gastroenterology

1407 S County Trail Building #4 Suite 410
East Greenwich, RI 02818

(401) 886-4040

Dr. Pedro Mariano Barros, MD is a gastroenterologist in East Greenwich, RI specializing in adult gastroenterology. Dr. Pedro Mariano Barros, MD is affiliated with CharterCARE Health Partners.

Office Locations

1407 S County Trail Building #4 Suite 410
East Greenwich, RI 02818

(401) 886-4040

(401) 886-4010

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33 Staniford Street
Providence, RI 02905

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Noteworthy Medicare Patient Procedures Performed by Dr. Pedro Mariano Barros, MD in 2024

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

Top 25%

By Affordability:

diagnostic EGD

diagnostic EGD without biopsy

diagnostic endoscopy

diagnostic upper endoscopy

EGD with biopsy

EGD with lesion removal

endoscopy

esophagogastroduodenoscopy

gastrointestinal endoscopy

gastrointestinal procedures

hospital care

inpatient care

inpatient hospital care

therapeutic EGD

therapeutic upper endoscopy

upper endoscopy

upper endoscopy with biopsy

upper endoscopy with lesion removal

In 2012, Dr. Pedro Mariano Barros, MD had a list price for diagnostic EGD, diagnostic EGD without biopsy, diagnostic endoscopy, diagnostic upper endoscopy, EGD with biopsy, EGD with lesion removal, endoscopy, esophagogastroduodenoscopy (EGD), gastrointestinal (GI) endoscopy, gastrointestinal procedures, hospital care, inpatient care, inpatient hospital care (for patient admitted to hospital), therapeutic EGD, therapeutic upper endoscopy, upper endoscopy, upper endoscopy with biopsy, and upper endoscopy with lesion removal that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Rhode Island. 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. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2012 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	199
doctor visit	408
gastrointestinal procedures	263
hospital care	268
inpatient care	268
lab tests	57
minimally invasive procedures	263
preventive care	64
removal of lesion (e.g. growth)	199

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2013 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	159
doctor visit	379
gastrointestinal procedures	243
hospital care	215
inpatient care	215
lab tests	73
minimally invasive procedures	243
preventive care	65
removal of lesion (e.g. growth)	159

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	169
Female	253

**Ethnicity**
Non-Hispanic White	219
Black	0
Hispanic	189
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	141
From 75 to 84	93
85 and over	51
Less than 65	137

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2013

Hypertension	75
High Cholesterol	70
Stroke	7
Ischemic Heart Disease	38
Depression	40
Chronic Kidney Disease	32
Asthma	14
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	23
Chronic Obstructive Pulmonary Disease	21
Diabetes	47
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2014 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	180
doctor visit	410
gastrointestinal procedures	279
hospital care	215
inpatient care	215
lab tests	84
minimally invasive procedures	279
preventive care	77
removal of lesion (e.g. growth)	180

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	163
Female	317

**Ethnicity**
Non-Hispanic White	262
Black	0
Hispanic	204
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	168
From 75 to 84	92
85 and over	54
Less than 65	166

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2014

Hypertension	75
High Cholesterol	70
Stroke	5
Ischemic Heart Disease	38
Depression	45
Chronic Kidney Disease	31
Asthma	12
Osteoperosis	11
Atrial Fibrilation	10
Heart Failure	25
Chronic Obstructive Pulmonary Disease	20
Diabetes	50
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2015 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	154
doctor visit	299
gastrointestinal procedures	228
hospital care	237
inpatient care	237
lab tests	48
minimally invasive procedures	228
preventive care	60
removal of lesion (e.g. growth)	154

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	306
Female	566

**Ethnicity**
Non-Hispanic White	484
Black	0
Hispanic	366
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	342
From 75 to 84	178
85 and over	108
Less than 65	244

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2015

Hypertension	75
High Cholesterol	68
Stroke	8
Ischemic Heart Disease	40
Depression	44
Chronic Kidney Disease	35
Asthma	21
Osteoperosis	11
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	21
Diabetes	46
Dementia	13
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2016 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	189
doctor visit	272
gastrointestinal procedures	282
hospital care	205
inpatient care	205
lab tests	75
minimally invasive procedures	282
preventive care	71
removal of lesion (e.g. growth)	189

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	160
Female	292

**Ethnicity**
Non-Hispanic White	233
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	175
From 75 to 84	98
85 and over	44
Less than 65	135

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2016

Hypertension	75
High Cholesterol	69
Stroke	3
Ischemic Heart Disease	37
Depression	45
Chronic Kidney Disease	38
Asthma	26
Osteoperosis	6
Atrial Fibrilation	11
Heart Failure	21
Chronic Obstructive Pulmonary Disease	17
Diabetes	48
Dementia	13
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2017 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	141
doctor visit	140
gastrointestinal procedures	184
hospital care	134
inpatient care	134
lab tests	35
minimally invasive procedures	184
preventive care	26
removal of lesion (e.g. growth)	141

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	131
Female	174

**Ethnicity**
Non-Hispanic White	187
Black	0
Hispanic	104
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	120
From 75 to 84	76
85 and over	37
Less than 65	72

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2017

Hypertension	75
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	44
Depression	35
Chronic Kidney Disease	46
Asthma	12
Osteoperosis	5
Atrial Fibrilation	16
Heart Failure	27
Chronic Obstructive Pulmonary Disease	20
Diabetes	44
Dementia	15
Cancer	14

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2018 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	114
doctor visit	124
gastrointestinal procedures	166
hospital care	86
inpatient care	86
minimally invasive procedures	166
preventive care	41
removal of lesion (e.g. growth)	114

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	99
Female	171

**Ethnicity**
Non-Hispanic White	162
Black	0
Hispanic	95
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	65
85 and over	42
Less than 65	59

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2018

Hypertension	75
High Cholesterol	68
Stroke	7
Ischemic Heart Disease	37
Depression	39
Chronic Kidney Disease	46
Asthma	13
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	21
Chronic Obstructive Pulmonary Disease	17
Diabetes	43
Dementia	17
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2019 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	91
doctor visit	95
gastrointestinal procedures	140
hospital care	131
inpatient care	131
minimally invasive procedures	140
preventive care	37
removal of lesion (e.g. growth)	91

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	112
Female	133

**Ethnicity**
Non-Hispanic White	175
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	103
From 75 to 84	62
85 and over	28
Less than 65	52

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2019

Hypertension	75
High Cholesterol	69
Stroke	7
Ischemic Heart Disease	44
Depression	45
Chronic Kidney Disease	45
Asthma	12
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	31
Chronic Obstructive Pulmonary Disease	22
Diabetes	40
Dementia	14
Cancer	18

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2020 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	79
doctor visit	54
gastrointestinal procedures	93
hospital care	162
inpatient care	162
minimally invasive procedures	93
removal of lesion (e.g. growth)	79

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	95
Female	107

**Ethnicity**
Non-Hispanic White	144
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	60
85 and over	30
Less than 65	35

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2020

Hypertension	75
High Cholesterol	72
Stroke	10
Ischemic Heart Disease	53
Depression	42
Chronic Kidney Disease	52
Asthma	12
Osteoperosis	5
Atrial Fibrilation	17
Heart Failure	32
Chronic Obstructive Pulmonary Disease	22
Diabetes	42
Dementia	20
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2021 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	92
doctor visit	29
gastrointestinal procedures	129
hospital care	98
inpatient care	98
minimally invasive procedures	129
preventive care	37
removal of lesion (e.g. growth)	92

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	103
Female	96

**Ethnicity**
Non-Hispanic White	136
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	98
From 75 to 84	48
85 and over	21
Less than 65	32

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	48
Depression	41
Chronic Kidney Disease	47
Asthma	11
Osteoperosis	6
Atrial Fibrilation	13
Heart Failure	28
Chronic Obstructive Pulmonary Disease	21
Diabetes	46
Dementia	15
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2022 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	94
doctor visit	27
gastrointestinal procedures	110
hospital care	142
inpatient care	142
minimally invasive procedures	110
preventive care	16
removal of lesion (e.g. growth)	94

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	100
Female	107

**Ethnicity**
Non-Hispanic White	139
Black	0
Hispanic	55
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	80
From 75 to 84	63
85 and over	27
Less than 65	37

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	42
Depression	34
Chronic Kidney Disease	33
Asthma	15
Osteoperosis	10
Atrial Fibrilation	25
Heart Failure	27
Chronic Obstructive Pulmonary Disease	24
Diabetes	44
Dementia	13
Cancer	17

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2023 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	91
doctor visit	20
gastrointestinal procedures	103
hospital care	100
inpatient care	100
minimally invasive procedures	103
preventive care	12
removal of lesion (e.g. growth)	91

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	90
Female	93

**Ethnicity**
Non-Hispanic White	133
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	61
85 and over	19
Less than 65	26

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	34
Depression	33
Chronic Kidney Disease	30
Asthma	12
Osteoperosis	7
Atrial Fibrilation	19
Heart Failure	25
Chronic Obstructive Pulmonary Disease	19
Diabetes	41
Dementia	8
Cancer	17

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI during 2024 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

diagnostic procedures	52
doctor visit	22
gastrointestinal procedures	79
hospital care	106
inpatient care	106
minimally invasive procedures	79
preventive care	15
removal of lesion (e.g. growth)	52

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	77
Female	91

**Ethnicity**
Non-Hispanic White	129
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	86
From 75 to 84	47
85 and over	19
Less than 65	16

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	30
Depression	33
Chronic Kidney Disease	31
Asthma	17
Osteoperosis	12
Atrial Fibrilation	28
Heart Failure	23
Chronic Obstructive Pulmonary Disease	27
Diabetes	34
Dementia	12
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Pedro Mariano Barros, MD for Medicare patients.

The highest averages for the top procedures that Dr. Pedro Mariano Barros, MD treated as a gastroenterologist in East Greenwich, RI were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

diagnostic procedures	125
doctor visit	175
gastrointestinal procedures	176
hospital care	161
inpatient care	161
lab tests	62
minimally invasive procedures	176
preventive care	43
removal of lesion (e.g. growth)	125

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Pedro Mariano Barros, MD.

**Gender**
Male	123
Female	184

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	184
Native American / Alaskan Native	0
Hispanic	77
Other	0

**Age**
75 to 84	72
85 and over	36
Less than 65	77
65 to 74	120

Average of Total of Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Pedro Mariano Barros, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	69
High Cholesterol	64
Stroke	7
Ischemic Heart Disease	37
Depression	36
Chronic Kidney Disease	35
Asthma	13
Osteoporosis	7
Heart Failure	23
Chronic Obstructive Pulmonary Disease	19
Diabetes	40
Atrial Fibrillation	14
Cancer	13
Dementia	12

Education & Training

He has a state license in Rhode Island.

Licensed In: Rhode Island

Ratings & Reviews

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General Payments

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

**Payments by Company**
AbbVie Inc.	$1,828 Rinvoq $674	Skyrizi $573	Humira $239	LINZESS $182	Creon $159
AbbVie, Inc.	$945 Humira $564	Creon $357	$24
Olympus Corporation of the Americas	$830 EndoCapsule $830
Phathom Pharmaceuticals, Inc.	$279 VOQUEZNA $279
Madrigal Pharmaceuticals	$233 REZDIFFRA $209	RESMETIROM $24
Other	$1,885 IBSRELA $170	XIFAXAN $163	Trulance $112	Kazano $107	XIFAXAN 550 MG TABLETS $93	Other $1,240

**Types of Payments**
Food and Beverage	$5,276
Travel and Lodging	$723

Biography

Dr. Pedro Barros practices adult gastroenterology. He is affiliated with CharterCare.

Select Year:

Dr. Pedro Mariano Barros, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Pedro Mariano Barros, MD in 2024

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. Pedro Mariano Barros, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Pedro Mariano Barros, 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. Pedro Mariano Barros, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography

Other Providers in East Greenwich, RI