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Dr. Maria Corazon Chang, MD

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Specializes in: Adult Gastroenterology

4201 S. Western Avenue
Oklahoma City, OK 73109

(405) 632-4000

Dr. Maria Corazon Chang, MD is a gastroenterologist in Lawton, OK specializing in adult gastroenterology. Dr. Maria Corazon Chang, MD is affiliated with Comanche County Memorial Hospital, Digestive Disease Specialists, Inc., COMANCHE COUNTY HEALTHCARE CORPORATION, Digestive Disease Specialists and DIGESTIVE DISEASE SPECIALISTS INC.

Office Locations

110 Nw 31st Street 3rd Floor
Lawton, OK

open_in_new

Digestive Disease Specialists

4201 S. Western Avenue
Oklahoma City, OK 73109

(405) 632-4000

(405) 632-4073

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Maria Corazon Chang, MD in 2023

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

Top 25%

By Affordability:

esophageal dilation

In 2012, Dr. Maria Corazon Chang, MD had a list price for esophageal dilation that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Oklahoma. 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. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2012 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

blood draw	100
diagnostic procedures	167
doctor visit	366
gastrointestinal procedures	244
hospital care	180
inpatient care	180
lab tests	86
minimally invasive procedures	244
preventive care	52
removal of lesion (e.g. growth)	167

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2013 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

blood draw	61
diagnostic procedures	149
doctor visit	432
gastrointestinal procedures	230
hospital care	190
inpatient care	190
lab tests	45
minimally invasive procedures	230
preventive care	61
removal of lesion (e.g. growth)	149

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	146
Female	311

**Ethnicity**
Non-Hispanic White	396
Black	31
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	195
From 75 to 84	122
85 and over	46
Less than 65	94

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2013

Hypertension	64
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	32
Depression	28
Chronic Kidney Disease	28
Asthma	8
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	18
Diabetes	29
Dementia	11
Cancer	7

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2014 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	151
doctor visit	422
gastrointestinal procedures	217
hospital care	145
inpatient care	145
minimally invasive procedures	217
preventive care	52
removal of lesion (e.g. growth)	151

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	99
Female	319

**Ethnicity**
Non-Hispanic White	351
Black	29
Hispanic	22
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	167
From 75 to 84	114
85 and over	50
Less than 65	87

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2014

Hypertension	64
High Cholesterol	46
Stroke	3
Ischemic Heart Disease	32
Depression	30
Chronic Kidney Disease	29
Asthma	7
Osteoperosis	11
Atrial Fibrilation	11
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	28
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2015 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

abdominal imaging	31
CT scan	16
diagnostic procedures	165
doctor visit	437
gastrointestinal procedures	229
hospital care	60
inpatient care	60
minimally invasive procedures	229
pelvic imaging	16
preventive care	64
removal of lesion (e.g. growth)	165
ultrasound (sonogram)	15

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	214
Female	582

**Ethnicity**
Non-Hispanic White	670
Black	66
Hispanic	36
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	374
From 75 to 84	158
85 and over	64
Less than 65	200

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2015

Hypertension	62
High Cholesterol	49
Stroke	3
Ischemic Heart Disease	30
Depression	29
Chronic Kidney Disease	24
Asthma	11
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	14
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	7
Cancer	7

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2016 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

abdominal imaging	22
diagnostic procedures	219
doctor visit	526
gastrointestinal procedures	324
hospital care	108
inpatient care	108
minimally invasive procedures	324
preventive care	83
removal of lesion (e.g. growth)	219
ultrasound (sonogram)	22

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	152
Female	339

**Ethnicity**
Non-Hispanic White	409
Black	38
Hispanic	25
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	236
From 75 to 84	132
85 and over	26
Less than 65	97

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2016

Hypertension	66
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	35
Depression	26
Chronic Kidney Disease	34
Asthma	18
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	16
Chronic Obstructive Pulmonary Disease	16
Diabetes	32
Dementia	10
Cancer	8

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2017 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	198
doctor visit	324
gastrointestinal procedures	278
hospital care	163
inpatient care	163
minimally invasive procedures	278
preventive care	55
removal of lesion (e.g. growth)	198

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	111
Female	310

**Ethnicity**
Non-Hispanic White	333
Black	29
Hispanic	30
Asian	0
Other	0
Native American	14

**Age**
From 65 to 74	178
From 75 to 84	114
85 and over	43
Less than 65	86

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2017

Hypertension	73
High Cholesterol	53
Stroke	5
Ischemic Heart Disease	41
Depression	35
Chronic Kidney Disease	40
Asthma	7
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	23
Chronic Obstructive Pulmonary Disease	21
Diabetes	36
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2018 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	188
doctor visit	324
esophageal dilation	15
gastrointestinal procedures	256
hospital care	268
inpatient care	268
minimally invasive procedures	256
preventive care	41
removal of lesion (e.g. growth)	188

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	112
Female	282

**Ethnicity**
Non-Hispanic White	304
Black	30
Hispanic	0
Asian	0
Other	0
Native American	28

**Age**
From 65 to 74	177
From 75 to 84	99
85 and over	47
Less than 65	71

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2018

Hypertension	75
High Cholesterol	63
Stroke	10
Ischemic Heart Disease	48
Depression	38
Chronic Kidney Disease	44
Asthma	8
Osteoperosis	7
Atrial Fibrilation	15
Heart Failure	30
Chronic Obstructive Pulmonary Disease	28
Diabetes	42
Dementia	14
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2019 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	194
doctor visit	294
gastrointestinal procedures	281
hospital care	203
inpatient care	203
minimally invasive procedures	281
preventive care	50
removal of lesion (e.g. growth)	194

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	110
Female	242

**Ethnicity**
Non-Hispanic White	269
Black	18
Hispanic	34
Asian	0
Other	0
Native American	16

**Age**
From 65 to 74	178
From 75 to 84	66
85 and over	39
Less than 65	69

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2019

Hypertension	75
High Cholesterol	67
Stroke	8
Ischemic Heart Disease	41
Depression	42
Chronic Kidney Disease	43
Asthma	9
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	26
Chronic Obstructive Pulmonary Disease	27
Diabetes	38
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2020 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	113
doctor visit	213
gastrointestinal procedures	152
hospital care	220
inpatient care	220
minimally invasive procedures	152
preventive care	16
removal of lesion (e.g. growth)	113

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	94
Female	192

**Ethnicity**
Non-Hispanic White	217
Black	0
Hispanic	24
Asian	0
Other	0
Native American	24

**Age**
From 65 to 74	123
From 75 to 84	76
85 and over	43
Less than 65	44

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2020

Hypertension	75
High Cholesterol	64
Stroke	8
Ischemic Heart Disease	49
Depression	34
Chronic Kidney Disease	55
Asthma	8
Osteoperosis	10
Atrial Fibrilation	17
Heart Failure	30
Chronic Obstructive Pulmonary Disease	24
Diabetes	40
Dementia	17
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2021 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	192
doctor visit	220
esophageal dilation	11
gastrointestinal procedures	277
hospital care	216
inpatient care	216
minimally invasive procedures	277
preventive care	43
removal of lesion (e.g. growth)	192

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	105
Female	229

**Ethnicity**
Non-Hispanic White	256
Black	23
Hispanic	22
Asian	0
Other	0
Native American	20

**Age**
From 65 to 74	174
From 75 to 84	79
85 and over	28
Less than 65	53

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2021

Hypertension	75
High Cholesterol	64
Stroke	9
Ischemic Heart Disease	44
Depression	36
Chronic Kidney Disease	47
Asthma	10
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	27
Chronic Obstructive Pulmonary Disease	25
Diabetes	37
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK during 2022 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

diagnostic procedures	195
doctor visit	143
esophageal dilation	22
gastrointestinal procedures	269
hospital care	203
inpatient care	203
minimally invasive procedures	269
preventive care	37
removal of lesion (e.g. growth)	195

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	117
Female	240

**Ethnicity**
Non-Hispanic White	274
Black	23
Hispanic	27
Asian	0
Other	0
Native American	20

**Age**
From 65 to 74	158
From 75 to 84	109
85 and over	37
Less than 65	53

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2022

Hypertension	75
High Cholesterol	74
Stroke	9
Ischemic Heart Disease	38
Depression	28
Chronic Kidney Disease	32
Asthma	11
Osteoperosis	11
Atrial Fibrilation	23
Heart Failure	28
Chronic Obstructive Pulmonary Disease	30
Diabetes	40
Dementia	10
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Maria Corazon Chang, MD for Medicare patients.

The highest averages for the top procedures that Dr. Maria Corazon Chang, MD treated as a gastroenterologist in Lawton, OK were gastrointestinal procedures, minimally invasive procedures, inpatient care and hospital care.

abdominal imaging	26
blood draw	80
CT scan	16
diagnostic procedures	175
doctor visit	336
esophageal dilation	16
gastrointestinal procedures	250
hospital care	177
inpatient care	177
lab tests	65
minimally invasive procedures	250
pelvic imaging	16
preventive care	50
removal of lesion (e.g. growth)	175
ultrasound (sonogram)	18

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Maria Corazon Chang, MD.

**Gender**
Male	114
Female	276

**Ethnicity**
Black / African American	26
Asian / Pacific Islander	0
Non-Hispanic White	316
Native American / Alaskan Native	11
Hispanic	21
Other	0

**Age**
75 to 84	97
85 and over	38
Less than 65	77
65 to 74	178

Average of Total of Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Maria Corazon Chang, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	64
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	35
Depression	29
Chronic Kidney Disease	34
Asthma	8
Osteoporosis	8
Heart Failure	21
Chronic Obstructive Pulmonary Disease	20
Diabetes	31
Atrial Fibrillation	12
Dementia	10
Cancer	9

Education & Training

She is certified by the Gastroenterology and Internal Medicine and has a state license in Kansas.

Board Certification: Gastroenterology and Internal Medicine

Licensed In: Kansas

Affiliations & Hospitals

Dr. Maria Corazon Chang, MD is associated with these hospitals and organizations:

Comanche County Memorial Hospital

Digestive Disease Specialists, Inc.

COMANCHE COUNTY HEALTHCARE CORPORATION

Digestive Disease Specialists

DIGESTIVE DISEASE SPECIALISTS INC

Ratings & Reviews

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General Payments

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

**Payments by Company**
AbbVie, Inc.	$2,447 Humira $1,281	Creon $569	Mavyret $266	Viekira $221	Viekira Pak $21	Other $90
AbbVie Inc.	$1,715 Humira $509	Mavyret $298	Rinvoq $268	Creon $234	LINZESS $229	Other $178
Takeda Pharmaceuticals U.S.A., Inc.	$1,130 ENTYVIO $883	MOTEGRITY $105	AMITIZA $72	GATTEX $12	Trintellix $3	Other $55
Janssen Biotech, Inc.	$557 SIMPONI $369	REMICADE $97	STELARA $91
UCB, Inc.	$490 Cimzia $490
Other	$4,600 XIFAXAN $244	ENTYVIO $227	LINZESS $207	Trulance $201	XIFAXANIBSD $166	Other $3,556

**Types of Payments**
Food and Beverage	$10,734
Education	$207

Biography

Dr. Maria Chang is a medical specialist in adult gastroenterology. She is affiliated with Digestive Disease Specialists, Inc. and Comanche County Memorial Hospital.

Select Year:

Dr. Maria Corazon Chang, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Maria Corazon Chang, 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. Maria Corazon Chang, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Corazon Chang, 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. Maria Corazon Chang, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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