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Ms. Mary C. Chang, DO

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Specializes in: Obstetrics

600 Primrose Street Suite 202
Haverhill, MA 01830

(978) 556-1000

Ms. Mary C. Chang, DO is an obstetrician in Haverhill, MA specializing in obstetrics.

Office Locations

600 Primrose Street Suite 202
Haverhill, MA 01830

(978) 556-1000

(978) 556-0094

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2012 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

blood draw	18
breast exam	25
cytology	23
doctor visit	66
gynecologic pathology	23
gynecologic procedures	25
preventive care	23

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2013 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	23
cytology	22
doctor visit	76
gynecologic pathology	22
gynecologic procedures	23
preventive care	22

2013 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	98

**Age**
From 65 to 74	36
From 75 to 84	0
85 and over	0
Less than 65	43

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2013

Hypertension	57
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	26
Depression	44
Chronic Kidney Disease	11
Asthma	0
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	0
Chronic Obstructive Pulmonary Disease	13
Diabetes	23
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2014 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	31
cytology	24
doctor visit	72
gynecologic pathology	24
gynecologic procedures	31
preventive care	24

2014 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	100

**Age**
From 65 to 74	33
From 75 to 84	13
85 and over	12
Less than 65	42

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2014

Hypertension	53
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	15
Depression	42
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	13
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2015 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	41
cytology	25
doctor visit	63
gynecologic pathology	25
gynecologic procedures	41
preventive care	25

2015 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	238

**Age**
From 65 to 74	106
From 75 to 84	0
85 and over	0
Less than 65	76

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2015

Hypertension	54
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	12
Depression	39
Chronic Kidney Disease	0
Asthma	14
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2016 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	53
cytology	25
doctor visit	107
gynecologic pathology	25
gynecologic procedures	53
preventive care	25

2016 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	147

**Age**
From 65 to 74	72
From 75 to 84	0
85 and over	0
Less than 65	48

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2016

Hypertension	53
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	16
Depression	31
Chronic Kidney Disease	14
Asthma	14
Osteoperosis	8
Atrial Fibrilation	10
Heart Failure	11
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2017 were breast exam and gynecologic procedures.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	29
doctor visit	91
gynecologic procedures	29

2017 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	116

**Age**
From 65 to 74	60
From 75 to 84	0
85 and over	0
Less than 65	31

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2017

Hypertension	46
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	15
Depression	29
Chronic Kidney Disease	16
Asthma	0
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	12
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2018 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	41
cytology	13
doctor visit	78
gynecologic pathology	13
gynecologic procedures	41
preventive care	13

2018 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	111

**Age**
From 65 to 74	51
From 75 to 84	0
85 and over	0
Less than 65	31

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2018

Hypertension	49
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	11
Depression	39
Chronic Kidney Disease	15
Asthma	0
Osteoperosis	12
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	14
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2019 were breast exam, gynecologic procedures, preventive care and cytology.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	48
cytology	11
doctor visit	105
gynecologic pathology	11
gynecologic procedures	48
preventive care	11

2019 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	128

**Age**
From 65 to 74	66
From 75 to 84	0
85 and over	0
Less than 65	31

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2019

Hypertension	48
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	13
Depression	24
Chronic Kidney Disease	16
Asthma	0
Osteoperosis	13
Atrial Fibrilation	9
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	23
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2020 were breast exam and gynecologic procedures.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	26
doctor visit	93
gynecologic procedures	26

2020 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	92

**Age**
From 65 to 74	56
From 75 to 84	0
85 and over	0
Less than 65	15

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2020

Hypertension	55
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	14
Depression	25
Chronic Kidney Disease	16
Asthma	14
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	17
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA during 2021 were breast exam and gynecologic procedures.

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

breast exam	20
doctor visit	45
gynecologic procedures	20

2021 Medicare Patient Data

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	75

**Age**
From 65 to 74	33
From 75 to 84	23
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2021

Hypertension	53
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	17
Depression	25
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	23
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2021

Volume of procedures performed by Ms. Mary C. Chang, DO for Medicare patients.

The highest averages for the top procedures that Ms. Mary C. Chang, DO treated as an obstetrician in Haverhill, MA were breast exam, gynecologic procedures, preventive care and cytology.

blood draw	18
breast exam	33
cytology	20
doctor visit	79
gynecologic pathology	20
gynecologic procedures	33
preventive care	20

Average Medicare Patient Data From 2012 - 2021

Information about Medicare patients treated by Ms. Mary C. Chang, DO.

**Gender**
Male	0
Female	110

**Age**
75 to 84	3
85 and over	1
Less than 65	31
65 to 74	51

Average of Total of Conditions of Medicare patients treated by Ms. Mary C. Chang, DO From 2012 - 2021

The highest averages of the most common conditions of Medicare patients that Ms. Mary C. Chang, DO treated were high cholesterol, hypertension, depression and diabetes.

Hypertension	46
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	13
Depression	29
Chronic Kidney Disease	10
Asthma	4
Osteoporosis	4
Heart Failure	1
Chronic Obstructive Pulmonary Disease	1
Diabetes	17
Atrial Fibrillation	5
Dementia	0
Cancer	4

Education & Training

She has a state license in Massachusetts.

Licensed In: Massachusetts

Ratings & Reviews

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General Payments

These charts describe general payments received by Ms. Mary C. Chang, DO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Bayer HealthCare Pharmaceuticals Inc.	$59 Skyla $59
Pfizer Inc.	$26 DUAVEE $26
Avion Pharmaceuticals	$23 FaLessa $11	Balcoltra $11
Upsher-Smith Laboratories Inc.	$11 Divigel estradiol gel 0.1 $11

**Types of Payments**
Food and Beverage	$119

Biography

Dr. Mary Chang practices obstetrics in Haverhill, MA. Dr. Chang has obtained a license to practice in Texas.

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Ms. Mary C. Chang, DO

Office Locations

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 Ms. Mary C. Chang, DO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Ms. Mary C. Chang, DO in 2021

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2021

Average Medicare Patient Data From 2012 - 2021

Average of Total of Conditions of Medicare patients treated by Ms. Mary C. Chang, DO From 2012 - 2021

Education & Training

Ratings & Reviews

General Payments

Biography

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