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

Dr. John Charles Gustafson, MD

(36 Ratings)

Specializes in: Obstetrics & Gynecology (OB/GYN)

University of Rochester School of Medicine and Dentistry (1977)

2795 Loma Vista Road
Ventura, CA 93003

(805) 643-8695

Dr. John Charles Gustafson, MD is an obstetrician and gynecologist in Ventura, CA specializing in obstetrics & gynecology (ob/gyn). He graduated from University of Rochester School of Medicine and Dentistry in 1977 and has 49 years of experience. Dr. John Charles Gustafson, MD is affiliated with COMMUNITY MEMORIAL HEALTH SYSTEM.

Office Locations

2795 Loma Vista Road
Ventura, CA 93003

(805) 643-8695

(805) 643-2087

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Noteworthy Medicare Patient Procedures Performed by Dr. John Charles Gustafson, MD in 2024

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

Top 10%

By Volume:

breast exam

pelvic exam

In 2024, Dr. John Charles Gustafson, MD performed more breast exam, and pelvic exam procedures for Medicare patients than 90% of providers in related specialties within California.

Top 25%

By Affordability:

alternatives to hysterectomy

breast exam

diagnostic endoscopy

diagnostic hysteroscopy

endoscopic polypectomy

hysteroscopic polypectomy

hysteroscopy

hysteroscopy with endometrial biopsy

minimally invasive gynecologic surgery

minimally invasive surgery

operative hysteroscopy

pelvic exam

polypectomy

removal of lesion

In 2012, Dr. John Charles Gustafson, MD had a list price for alternatives to hysterectomy, breast exam, diagnostic endoscopy, diagnostic hysteroscopy, endoscopic polypectomy, endoscopic surgery, excision, gynecologic exams, gynecologic surgery, hysteroscopic polypectomy, hysteroscopy, hysteroscopy with endometrial biopsy, minimally invasive gynecologic surgery, minimally invasive surgery, operative hysteroscopy, pelvic exam, polypectomy (polyp removal), and removal of lesion (e.g. growth) 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. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2012 were lab tests, preventive care, ultrasound (sonogram) and pelvic imaging.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

doctor visit	79
lab tests	62
pelvic imaging	54
preventive care	62
ultrasound (sonogram)	54
women's imaging	27

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2013 were ultrasound (sonogram), pelvic imaging, lab tests and preventive care.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

doctor visit	74
lab tests	57
pelvic imaging	64
preventive care	57
ultrasound (sonogram)	64
women's imaging	32

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	138

**Ethnicity**
Non-Hispanic White	110
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	93
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2013

Hypertension	55
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	22
Depression	14
Chronic Kidney Disease	12
Asthma	0
Osteoperosis	9
Atrial Fibrilation	9
Heart Failure	9
Chronic Obstructive Pulmonary Disease	0
Diabetes	20
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2014 were preventive care, ultrasound (sonogram), pelvic imaging and lab tests.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	51
cytology	17
doctor visit	56
gynecologic pathology	17
gynecologic procedures	51
lab tests	54
pelvic imaging	64
preventive care	71
ultrasound (sonogram)	64
women's imaging	31

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	133

**Ethnicity**
Non-Hispanic White	114
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	78
From 75 to 84	29
85 and over	14
Less than 65	12

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2014

Hypertension	52
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	18
Depression	14
Chronic Kidney Disease	17
Asthma	12
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	11
Chronic Obstructive Pulmonary Disease	11
Diabetes	20
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2015 were preventive care, ultrasound (sonogram), pelvic imaging and breast exam.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	47
cytology	33
doctor visit	38
gynecologic pathology	33
gynecologic procedures	47
lab tests	31
pelvic imaging	56
preventive care	64
ultrasound (sonogram)	56
women's imaging	26

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	242

**Ethnicity**
Non-Hispanic White	188
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	160
From 75 to 84	38
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2015

Hypertension	55
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	15
Depression	22
Chronic Kidney Disease	14
Asthma	12
Osteoperosis	13
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	11
Diabetes	21
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2016 were breast exam, gynecologic procedures, preventive care and ultrasound (sonogram).

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	76
cytology	30
doctor visit	51
gynecologic pathology	30
gynecologic procedures	76
lab tests	30
pelvic imaging	43
preventive care	60
ultrasound (sonogram)	43
women's imaging	20

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	150

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

**Age**
From 65 to 74	94
From 75 to 84	33
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2016

Hypertension	46
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	15
Depression	23
Chronic Kidney Disease	15
Asthma	11
Osteoperosis	13
Atrial Fibrilation	8
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	12
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2017 were breast exam, gynecologic procedures, preventive care and lab tests.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	63
cytology	23
doctor visit	74
gynecologic pathology	23
gynecologic procedures	63
lab tests	31
preventive care	54

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	131

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

**Age**
From 65 to 74	87
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2017

Hypertension	55
High Cholesterol	42
Stroke	0
Ischemic Heart Disease	11
Depression	18
Chronic Kidney Disease	12
Asthma	0
Osteoperosis	11
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	12
Dementia	0
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2018 were breast exam, gynecologic procedures, preventive care and lab tests.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	81
cytology	26
doctor visit	46
gynecologic pathology	26
gynecologic procedures	81
lab tests	34
preventive care	60

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	141

**Ethnicity**
Non-Hispanic White	121
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	97
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2018

Hypertension	43
High Cholesterol	41
Stroke	0
Ischemic Heart Disease	13
Depression	20
Chronic Kidney Disease	10
Asthma	11
Osteoperosis	13
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	11
Diabetes	11
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2019 were breast exam, gynecologic procedures, preventive care and lab tests.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	75
cytology	16
doctor visit	75
gynecologic pathology	16
gynecologic procedures	75
lab tests	26
preventive care	42

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	144

**Ethnicity**
Non-Hispanic White	123
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	98
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2019

Hypertension	44
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	17
Depression	26
Chronic Kidney Disease	14
Asthma	0
Osteoperosis	10
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	10
Dementia	0
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2020 were breast exam, gynecologic procedures, preventive care and lab tests.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	68
cytology	15
doctor visit	49
gynecologic pathology	15
gynecologic procedures	68
lab tests	24
preventive care	39

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	136

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

**Age**
From 65 to 74	91
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2020

Hypertension	46
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	21
Depression	24
Chronic Kidney Disease	19
Asthma	0
Osteoperosis	18
Atrial Fibrilation	0
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	10
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2021 were breast exam, gynecologic procedures, preventive care and lab tests.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	98
cytology	30
doctor visit	82
gynecologic pathology	30
gynecologic procedures	98
lab tests	36
preventive care	66

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	172

**Ethnicity**
Non-Hispanic White	146
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	120
From 75 to 84	41
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2021

Hypertension	49
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	18
Depression	26
Chronic Kidney Disease	13
Asthma	9
Osteoperosis	16
Atrial Fibrilation	8
Heart Failure	0
Chronic Obstructive Pulmonary Disease	7
Diabetes	12
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2022 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	124
cytology	48
doctor visit	68
gynecologic pathology	48
gynecologic procedures	124
lab tests	32
preventive care	80

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	190

**Ethnicity**
Non-Hispanic White	161
Black	0
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	129
From 75 to 84	43
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2022

Hypertension	54
High Cholesterol	69
Stroke	6
Ischemic Heart Disease	9
Depression	23
Chronic Kidney Disease	7
Asthma	8
Osteoperosis	24
Atrial Fibrilation	12
Heart Failure	0
Chronic Obstructive Pulmonary Disease	9
Diabetes	9
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2023 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	114
cytology	40
doctor visit	81
gynecologic pathology	40
gynecologic procedures	114
lab tests	18
preventive care	58

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	187

**Ethnicity**
Non-Hispanic White	164
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	45
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2023

Hypertension	52
High Cholesterol	70
Stroke	0
Ischemic Heart Disease	14
Depression	27
Chronic Kidney Disease	8
Asthma	13
Osteoperosis	21
Atrial Fibrilation	9
Heart Failure	0
Chronic Obstructive Pulmonary Disease	9
Diabetes	9
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA during 2024 were gynecologic procedures, breast exam, preventive care and cytology.

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

breast exam	111
cytology	43
diagnostic procedures	11
doctor visit	67
excision	11
gynecologic pathology	43
gynecologic procedures	122
minimally invasive procedures	11
preventive care	43
removal of lesion (e.g. growth)	11

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	172

**Ethnicity**
Non-Hispanic White	148
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	121
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2024

Hypertension	50
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	10
Depression	27
Chronic Kidney Disease	8
Asthma	9
Osteoperosis	28
Atrial Fibrilation	6
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	12
Dementia	0
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. John Charles Gustafson, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Charles Gustafson, MD treated as an obstetrician and gynecologist in Ventura, CA were gynecologic procedures, breast exam, preventive care and ultrasound (sonogram).

breast exam	82
cytology	29
diagnostic procedures	11
doctor visit	64
excision	11
gynecologic pathology	29
gynecologic procedures	83
lab tests	36
minimally invasive procedures	11
pelvic imaging	56
preventive care	58
removal of lesion (e.g. growth)	11
ultrasound (sonogram)	56
women's imaging	27

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. John Charles Gustafson, MD.

**Gender**
Male	0
Female	148

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	125
Hispanic	2
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	28
85 and over	1
Less than 65	0
65 to 74	99

Average of Total of Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. John Charles Gustafson, MD treated were high cholesterol, hypertension, depression and ischemic heart disease.

Hypertension	46
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	14
Depression	20
Chronic Kidney Disease	11
Asthma	6
Osteoporosis	14
Heart Failure	2
Chronic Obstructive Pulmonary Disease	5
Diabetes	12
Atrial Fibrillation	4
Dementia	0
Cancer	11

Education & Training

Dr. John Charles Gustafson, MD graduated from University of Rochester School of Medicine and Dentistry in 1977. He has a state license in California.

Medical School: University of Rochester School of Medicine and Dentistry (1977)

Licensed In: California

Ratings & Reviews

Dr. John Charles Gustafson, MD has an exceptional overall rating with an average of 4.51 out of 5 stars based on 36 ratings. We collect ratings and reviews of Dr. John Charles Gustafson, MD from all over the web to help you find the right in Ventura, CA.

4.51

Overall Rating

(36 Ratings)

Leave a Review

General Payments

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

**Payments by Company**
Pfizer Inc.	$262 DUAVEE $237	ABRYSVO $26
Shionogi Inc	$260 Osphena $260
ASCEND Therapeutics US, LLC	$116 EstroGel $69	Sprix $28	PROTIVA $2	$17
AbbVie, Inc.	$114 Lupron $97	Orilissa $14	$2
Medtronic USA, Inc.	$90 Sacral Nerve Stimulation - Neuro $90
Other	$417 HawkOne $58	Freestyle Libre 2 $57	ZEPBOUND $47	Cologuard Collection Kit $39	Osphena $36	Other $180

**Types of Payments**
Food and Beverage	$1,136
Gift	$116
Education	$6

Biography

Dr. John Gustafson is a specialist in obstetrics & gynecology (OB/GYN) in Ventura, CA. Patients gave him an average rating of 4.5 stars (out of 5).

Select Year:

Dr. John Charles Gustafson, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. John Charles Gustafson, MD in 2024

By Volume:

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. John Charles Gustafson, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Charles Gustafson, 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. John Charles Gustafson, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography

Other Providers in Ventura, CA