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Home > CA Providers > Obstetricians & Gynecologists: OB-GYNs

Dr. Brian James Vierra, MD

Accepting New Patients

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Specializes in: Obstetrics & Gynecology

Loyola University Chicago, Stritch School of Medicine

378 W. Olive Avenue Suite D
Merced, CA 95348

(209) 725-7560

Dr. Brian James Vierra, MD is an obstetrician and gynecologist in Merced, CA specializing in obstetrics & gynecology. He graduated from Loyola University Chicago, Stritch School of Medicine. Dr. Brian James Vierra, MD is affiliated with Mercy Medical Center Merced, Dignity Health and MFA Medical Group.

Office Locations

MFA Medical Group

378 W. Olive Avenue Suite D
Merced, CA 95348

(209) 725-7560

(209) 725-7561

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Noteworthy Medicare Patient Procedures Performed by Dr. Brian James Vierra, MD in 2023

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

Top 10%

By Affordability:

breast exam

gynecologic exams

pelvic exam

In 2023, Dr. Brian James Vierra, MD had a list price for breast exam, gynecologic exams, and pelvic exam that was lower than the list prices billed to Medicare by 90% 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. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2012 were placement of vaginal support device, diagnostic procedures and gynecologic procedures.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

diagnostic procedures	11
doctor visit	211
gynecologic procedures	11
placement of vaginal support device	14

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2013 were placement of vaginal support device, breast exam, gynecologic procedures and preventive care.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	21
cytology	18
doctor visit	241
gynecologic pathology	18
gynecologic procedures	21
placement of vaginal support device	21
preventive care	18

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	154

**Ethnicity**
Non-Hispanic White	94
Black	0
Hispanic	49
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	60
From 75 to 84	48
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2013

Hypertension	66
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	31
Depression	23
Chronic Kidney Disease	15
Asthma	14
Osteoperosis	8
Atrial Fibrilation	0
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2014 were gynecologic procedures, preventive care, breast exam and cytology.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	22
cytology	22
diagnostic procedures	14
doctor visit	289
gynecologic pathology	22
gynecologic procedures	36
lab tests	16
placement of vaginal support device	18
preventive care	22

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	182

**Ethnicity**
Non-Hispanic White	119
Black	0
Hispanic	49
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	82
From 75 to 84	54
85 and over	12
Less than 65	34

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2014

Hypertension	65
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	31
Depression	26
Chronic Kidney Disease	19
Asthma	14
Osteoperosis	9
Atrial Fibrilation	0
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	34
Dementia	7
Cancer	7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2015 were lab tests, breast exam, gynecologic procedures and preventive care.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	21
cytology	15
doctor visit	246
gynecologic pathology	15
gynecologic procedures	21
lab tests	22
placement of vaginal support device	14
preventive care	15

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	290

**Ethnicity**
Non-Hispanic White	192
Black	0
Hispanic	70
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	130
From 75 to 84	80
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2015

Hypertension	66
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	32
Depression	25
Chronic Kidney Disease	16
Asthma	14
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	30
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2016 were breast exam, gynecologic procedures and lab tests.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	21
doctor visit	190
gynecologic procedures	21
lab tests	14

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	134

**Ethnicity**
Non-Hispanic White	84
Black	0
Hispanic	34
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	59
From 75 to 84	25
85 and over	12
Less than 65	38

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2016

Hypertension	63
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	34
Depression	19
Chronic Kidney Disease	18
Asthma	20
Osteoperosis	9
Atrial Fibrilation	0
Heart Failure	18
Chronic Obstructive Pulmonary Disease	16
Diabetes	30
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2017 were lab tests, breast exam, gynecologic procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	23
doctor visit	214
gynecologic procedures	23
lab tests	28
pelvic imaging	19
placement of vaginal support device	12
ultrasound (sonogram)	19

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	123

**Ethnicity**
Non-Hispanic White	82
Black	0
Hispanic	27
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	58
From 75 to 84	32
85 and over	13
Less than 65	20

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2017

Hypertension	68
High Cholesterol	40
Stroke	0
Ischemic Heart Disease	35
Depression	19
Chronic Kidney Disease	24
Asthma	15
Osteoperosis	11
Atrial Fibrilation	0
Heart Failure	22
Chronic Obstructive Pulmonary Disease	11
Diabetes	24
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2018 were lab tests, breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	12
doctor visit	165
gynecologic procedures	12
lab tests	28

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	107

**Ethnicity**
Non-Hispanic White	73
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	54
From 75 to 84	26
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2018

Hypertension	56
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	34
Depression	21
Chronic Kidney Disease	16
Asthma	0
Osteoperosis	12
Atrial Fibrilation	0
Heart Failure	20
Chronic Obstructive Pulmonary Disease	15
Diabetes	21
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2019 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	17
cytology	12
doctor visit	146
gynecologic pathology	12
gynecologic procedures	17
lab tests	11
preventive care	12

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	102

**Ethnicity**
Non-Hispanic White	70
Black	0
Hispanic	20
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	0
85 and over	0
Less than 65	25

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2019

Hypertension	62
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	32
Depression	21
Chronic Kidney Disease	25
Asthma	13
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	22
Chronic Obstructive Pulmonary Disease	16
Diabetes	22
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2020 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	15
doctor visit	106
gynecologic procedures	15

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	84

**Ethnicity**
Non-Hispanic White	59
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	42
From 75 to 84	18
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2020

Hypertension	55
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	35
Depression	18
Chronic Kidney Disease	30
Asthma	0
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	24
Chronic Obstructive Pulmonary Disease	13
Diabetes	23
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2021 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	18
cytology	14
doctor visit	111
gynecologic pathology	14
gynecologic procedures	18
preventive care	14

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	77

**Ethnicity**
Non-Hispanic White	53
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	38
From 75 to 84	22
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2021

Hypertension	66
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	35
Depression	17
Chronic Kidney Disease	30
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	19
Chronic Obstructive Pulmonary Disease	0
Diabetes	23
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA during 2022 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

breast exam	14
doctor visit	101
gynecologic procedures	14

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	86

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

**Age**
From 65 to 74	34
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2022

Hypertension	69
High Cholesterol	74
Stroke	0
Ischemic Heart Disease	26
Depression	14
Chronic Kidney Disease	22
Asthma	15
Osteoperosis	16
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	23
Dementia	0
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Brian James Vierra, MD for Medicare patients.

The highest averages for the top procedures that Dr. Brian James Vierra, MD treated as an obstetrician and gynecologist in Merced, CA were lab tests, ultrasound (sonogram), pelvic imaging and gynecologic procedures.

breast exam	18
cytology	16
diagnostic procedures	12
doctor visit	183
gynecologic pathology	16
gynecologic procedures	19
lab tests	19
pelvic imaging	19
preventive care	16
ultrasound (sonogram)	19

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Brian James Vierra, MD.

**Gender**
Male	0
Female	121

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	79
Native American / Alaskan Native	0
Hispanic	22
Other	0

**Age**
75 to 84	30
85 and over	3
Less than 65	10
65 to 74	55

Average of Total of Conditions of Medicare patients treated by Dr. Brian James Vierra, MD From 2012 - 2022

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

Hypertension	57
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	19
Asthma	9
Osteoporosis	7
Heart Failure	14
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Atrial Fibrillation	0
Cancer	2
Dementia	1

Education & Training

Dr. Brian James Vierra, MD graduated from Loyola University Chicago, Stritch School of Medicine. He completed residency at Danbury Hospital. He is certified by the Obstetrics & Gynecology and has a state license in California.

Medical School: Loyola University Chicago, Stritch School of Medicine

Residency: Danbury Hospital

Board Certification: Obstetrics & Gynecology

Licensed In: California

Affiliations & Hospitals

Dr. Brian James Vierra, MD is associated with these hospitals and organizations:

Mercy Medical Center Merced

Dignity Health

MFA Medical Group

Ratings & Reviews

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General Payments

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

**Payments by Company**
Boston Scientific Corporation	$98 SYMPHION $98
Roche Diagnostics Corporation	$88 RS Harmony Test Related Products $69	MD cobas Instruments and Reagents $19
Smith & Nephew, Inc.	$84 GYN $84
Endogastric Solutions, Inc	$53 EsophyX $53
HOLOGIC INC	$32 NovaSure $23	AQUILEX $9
Other	$29 Skyla $17	AC2 $12

**Types of Payments**
Food and Beverage	$383

Biography

Dr. Brian Vierra is a Merced, CA physician who specializes in obstetrics & gynecology. He attended Loyola University Chicago, Stritch School of Medicine and then went on to complete his residency at Danbury Hospital. Dr. Vierra speaks Spanish. His professional affiliations include Mercy Medical Center Merced and MFA Medical Group. Dr. Vierra welcomes new patients at his office inMerced, CA as reported by Dignity Health.

Select Year:

Dr. Brian James Vierra, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Brian James Vierra, MD in 2023

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. Brian James Vierra, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brian James Vierra, 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. Brian James Vierra, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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