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Home > CA Providers > Urogynecologists

Dr. Mary Margaret Oneill, MD

(5 Ratings)

Specializes in: Obstetrics and Urogynecology

200 West Campbell Avenue
Campbell, CA 95008

(408) 583-0522

Dr. Mary Margaret Oneill, MD is an obstetrician in Campbell, CA specializing in obstetrics and urogynecology. Dr. Mary Margaret Oneill, MD is affiliated with Good Samaritan Hospital and Santa Clara County IPA.

Office Locations

200 West Campbell Avenue
Campbell, CA 95008

(408) 583-0522

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Noteworthy Medicare Patient Procedures Performed by Dr. Mary Margaret Oneill, MD in 2024

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

Top 10%

By Affordability:

pelvic imaging

pelvic ultrasound

transabdominal ultrasound

ultrasound

In 2024, Dr. Mary Margaret Oneill, MD had a list price for pelvic imaging, pelvic ultrasound, transabdominal ultrasound, and ultrasound (sonogram) 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.

Top 25%

By Volume:

breast exam

pelvic exam

In 2012, Dr. Mary Margaret Oneill, MD performed more breast exam, and pelvic exam procedures for Medicare patients than 75% of providers in related specialties within California.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2012 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	83
doctor visit	82
gynecologic procedures	83

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2013 were breast exam, gynecologic procedures, ultrasound (sonogram) and pelvic imaging.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	99
doctor visit	77
gynecologic procedures	99
pelvic imaging	13
ultrasound (sonogram)	13
women's imaging	13

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	149

**Ethnicity**
Non-Hispanic White	107
Black	0
Hispanic	22
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	41
85 and over	15
Less than 65	16

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2013

Hypertension	64
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	20
Depression	17
Chronic Kidney Disease	14
Asthma	9
Osteoperosis	15
Atrial Fibrilation	0
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	30
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2014 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	81
doctor visit	67
gynecologic procedures	81

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	116

**Ethnicity**
Non-Hispanic White	89
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	30
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2014

Hypertension	57
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	18
Depression	14
Chronic Kidney Disease	11
Asthma	9
Osteoperosis	12
Atrial Fibrilation	0
Heart Failure	9
Chronic Obstructive Pulmonary Disease	0
Diabetes	24
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2015 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	92
cytology	18
doctor visit	131
gynecologic pathology	18
gynecologic procedures	92
preventive care	18

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	280

**Ethnicity**
Non-Hispanic White	202
Black	0
Hispanic	36
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	152
From 75 to 84	94
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2015

Hypertension	56
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	21
Depression	15
Chronic Kidney Disease	20
Asthma	9
Osteoperosis	17
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	32
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2016 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	76
cytology	19
doctor visit	161
gynecologic pathology	19
gynecologic procedures	76
pelvic imaging	11
preventive care	19
ultrasound (sonogram)	11
women's imaging	11

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	127

**Ethnicity**
Non-Hispanic White	84
Black	0
Hispanic	21
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	68
From 75 to 84	41
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2016

Hypertension	53
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	17
Depression	16
Chronic Kidney Disease	21
Asthma	10
Osteoperosis	17
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	29
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2017 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	86
cytology	16
doctor visit	173
gynecologic pathology	16
gynecologic procedures	86
preventive care	16

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	140

**Ethnicity**
Non-Hispanic White	104
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	72
From 75 to 84	52
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2017

Hypertension	58
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	23
Depression	16
Chronic Kidney Disease	22
Asthma	0
Osteoperosis	17
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	29
Dementia	0
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2018 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	75
cytology	12
doctor visit	176
gynecologic pathology	12
gynecologic procedures	75
preventive care	12

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	133

**Ethnicity**
Non-Hispanic White	90
Black	0
Hispanic	24
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	64
From 75 to 84	48
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2018

Hypertension	59
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	23
Depression	18
Chronic Kidney Disease	26
Asthma	0
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	29
Dementia	9
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2019 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	94
cytology	14
doctor visit	157
gynecologic pathology	14
gynecologic procedures	94
preventive care	14

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	150

**Ethnicity**
Non-Hispanic White	108
Black	0
Hispanic	21
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	86
From 75 to 84	46
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2019

Hypertension	57
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	21
Depression	13
Chronic Kidney Disease	22
Asthma	11
Osteoperosis	21
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	25
Dementia	0
Cancer	20

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2020 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	46
doctor visit	116
gynecologic procedures	46

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	93

**Ethnicity**
Non-Hispanic White	63
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	46
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2020

Hypertension	55
High Cholesterol	68
Stroke	0
Ischemic Heart Disease	32
Depression	20
Chronic Kidney Disease	25
Asthma	12
Osteoperosis	18
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	31
Dementia	0
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2021 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	152
cytology	30
doctor visit	304
gynecologic pathology	30
gynecologic procedures	152
preventive care	30

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	124

**Ethnicity**
Non-Hispanic White	79
Black	0
Hispanic	15
Asian	0
Other	14
Native American	0

**Age**
From 65 to 74	67
From 75 to 84	38
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2021

Hypertension	60
High Cholesterol	72
Stroke	0
Ischemic Heart Disease	21
Depression	19
Chronic Kidney Disease	20
Asthma	10
Osteoperosis	25
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	27
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2022 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	44
cytology	13
doctor visit	96
gynecologic pathology	13
gynecologic procedures	44
preventive care	13

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	116

**Ethnicity**
Non-Hispanic White	79
Black	0
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	66
From 75 to 84	38
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2022

Hypertension	64
High Cholesterol	73
Stroke	0
Ischemic Heart Disease	13
Depression	10
Chronic Kidney Disease	11
Asthma	13
Osteoperosis	26
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	0
Cancer	24

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2023 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	72
cytology	14
doctor visit	99
gynecologic pathology	14
gynecologic procedures	72
preventive care	14

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	110

**Ethnicity**
Non-Hispanic White	69
Black	0
Hispanic	0
Asian	21
Other	0
Native American	0

**Age**
From 65 to 74	67
From 75 to 84	28
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2023

Hypertension	59
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	20
Depression	18
Chronic Kidney Disease	11
Asthma	15
Osteoperosis	30
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	19
Dementia	0
Cancer	25

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA during 2024 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

breast exam	67
cytology	16
doctor visit	90
gynecologic pathology	16
gynecologic procedures	67
pelvic imaging	11
preventive care	16
ultrasound (sonogram)	11

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	136

**Ethnicity**
Non-Hispanic White	77
Black	0
Hispanic	18
Asian	25
Other	0
Native American	0

**Age**
From 65 to 74	79
From 75 to 84	42
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD in 2024

Hypertension	65
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	15
Depression	10
Chronic Kidney Disease	14
Asthma	12
Osteoperosis	29
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	21
Dementia	0
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Mary Margaret Oneill, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mary Margaret Oneill, MD treated as an obstetrician in Campbell, CA were breast exam, gynecologic procedures, preventive care and cytology.

breast exam	82
cytology	16
doctor visit	133
gynecologic pathology	16
gynecologic procedures	82
pelvic imaging	11
preventive care	16
ultrasound (sonogram)	11
women's imaging	12

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Mary Margaret Oneill, MD.

**Gender**
Male	0
Female	128

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	3
Non-Hispanic White	88
Hispanic	16
Native American / Alaskan Native	0
Other	1

**Age**
85 and over	1
75 to 84	40
Less than 65	1
65 to 74	69

Average of Total of Conditions of Medicare patients treated by Dr. Mary Margaret Oneill, MD From 2012 - 2024

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

Hypertension	54
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	18
Depression	14
Chronic Kidney Disease	16
Asthma	8
Osteoporosis	18
Heart Failure	1
Chronic Obstructive Pulmonary Disease	0
Diabetes	24
Atrial Fibrillation	0
Cancer	15
Dementia	0

Education & Training

She completed residency at Metropolitan Hospital. She has a state license in California.

Residency: Metropolitan Hospital (1990)

Licensed In: California

Ratings & Reviews

Dr. Mary Margaret Oneill, MD has a high overall rating with an average of 4.0 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. Mary Margaret Oneill, MD from all over the web to help you find the right in Campbell, CA.

Overall Rating

(5 Ratings)

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General Payments

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

**Payments by Company**
AbbVie, Inc.	$125 Orilissa $125
Astellas Pharma US Inc	$90 $90
Sumitomo Pharma America, Inc.	$19 MYFEMBREE $19
Actavis Pharma Inc	$19 ESTRACE CREAM $19
MAYNE PHARMA COMMERCIAL LLC	$11 $11

**Types of Payments**
Food and Beverage	$174
Education	$90

Biography

Dr. Mary Oneill is an obstetrics and gynecology specialist in Campbell, CA. In addition to English, Dr. Oneill speaks Spanish. She is professionally affiliated with Good Samaritan Hospital. For her residency, Dr. Oneill trained at Metropolitan Hospital. Her average patient rating is 4.0 stars (out of 5).