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Dr. Douglas Aaron Rex, FACOS, DO

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Specializes in: General Surgery

Pikeville College School of Osteopathic Medicine (2003)

330 N. Wabash Avenue Suite 370
Marion, IN 46952

(765) 660-7500

Dr. Douglas Aaron Rex, FACOS, DO is a general surgeon in Marion, IN specializing in general surgery. He graduated from Pikeville College School of Osteopathic Medicine in 2003 and has 23 years of experience. Dr. Douglas Aaron Rex, FACOS, DO is affiliated with Marion Health and Marion General Hospital.

Office Locations

Marion Health

330 N. Wabash Avenue Suite 370
Marion, IN 46952

(765) 660-7500

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In The News

“In the 45 to 49 age group, there are about 7,000 new colorectal cancer cases per year, and about 1,800 deaths, said Dr. Douglas Rex, president-elect of the American Society for Gastrointestinal...”—"'Get the word out': New USPSTF guidelines lower age to begin colorectal cancer screening from 50 to 45", USA Today, May 2021

“Dr. Douglas Rex, who studies colorectal cancer and screening at the Indiana University School of Medicine, said that the increase in rectal cancer would fit with his own anecdotal observations.”—"Rectal Cancer Increasing in Younger Adults", Fox News, March 2015

Noteworthy Medicare Patient Procedures Performed by Dr. Douglas Aaron Rex, FACOS, DO in 2023

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

Top 25%

By Volume:

colonoscopy

colonoscopy with biopsy

colonoscopy with lesion removal

EGD with biopsy

EGD with lesion removal

endoscopy

gastrointestinal biopsy

gastrointestinal procedures

removal of lesion

therapeutic upper endoscopy

By Affordability:

diagnostic EGD

diagnostic upper endoscopy

EGD with biopsy

EGD with lesion removal

In 2012, among providers in related specialties within Indiana, Dr. Douglas Aaron Rex, FACOS, DO performed more colonoscopy, colonoscopy with biopsy, colonoscopy with lesion removal, EGD with biopsy, EGD with lesion removal, endoscopy, gastrointestinal biopsy, gastrointestinal procedures, removal of lesion (e.g. growth), and therapeutic upper endoscopy procedures for Medicare patients than 75% of them and he also had a list price for diagnostic EGD, diagnostic upper endoscopy, EGD with biopsy, and EGD with lesion removal that was lower than the list prices billed to Medicare by 75% of them. 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. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

doctor visit	73
hospital care	74
inpatient care	74

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2013 were hospital care and inpatient care.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

doctor visit	72
hospital care	51
inpatient care	51

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	45
Female	60

**Age**
From 65 to 74	47
From 75 to 84	0
85 and over	0
Less than 65	26

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2013

Hypertension	70
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	35
Depression	28
Chronic Kidney Disease	32
Asthma	10
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	23
Chronic Obstructive Pulmonary Disease	18
Diabetes	45
Dementia	0
Cancer	22

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

doctor visit	64

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	49
Female	44

**Age**
From 65 to 74	35
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2014

Hypertension	75
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	45
Depression	31
Chronic Kidney Disease	28
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	24
Chronic Obstructive Pulmonary Disease	30
Diabetes	34
Dementia	0
Cancer	20

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2015 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

diagnostic procedures	25
doctor visit	112
gastrointestinal procedures	37
minimally invasive procedures	37
preventive care	12
removal of lesion (e.g. growth)	25

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	112
Female	142

**Age**
From 65 to 74	136
From 75 to 84	54
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2015

Hypertension	72
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	28
Depression	28
Chronic Kidney Disease	26
Asthma	13
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	20
Diabetes	30
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2016 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

diagnostic procedures	79
doctor visit	128
gastrointestinal procedures	106
minimally invasive procedures	106
preventive care	27
removal of lesion (e.g. growth)	79

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	85
Female	105

**Ethnicity**
Non-Hispanic White	178
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	97
From 75 to 84	36
85 and over	16
Less than 65	41

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2016

Hypertension	75
High Cholesterol	68
Stroke	0
Ischemic Heart Disease	40
Depression	31
Chronic Kidney Disease	35
Asthma	26
Osteoperosis	8
Atrial Fibrilation	12
Heart Failure	16
Chronic Obstructive Pulmonary Disease	23
Diabetes	37
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2017 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

catheterization	21
diagnostic procedures	132
doctor visit	352
gastrointestinal procedures	171
hospital care	18
inpatient care	18
minimally invasive procedures	171
preventive care	39
removal of lesion (e.g. growth)	132

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	140
Female	195

**Ethnicity**
Non-Hispanic White	312
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	137
From 75 to 84	88
85 and over	31
Less than 65	79

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2017

Hypertension	75
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	36
Depression	29
Chronic Kidney Disease	33
Asthma	13
Osteoperosis	10
Atrial Fibrilation	17
Heart Failure	22
Chronic Obstructive Pulmonary Disease	28
Diabetes	35
Dementia	8
Cancer	25

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2018 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

catheterization	22
diagnostic procedures	127
doctor visit	321
gastrointestinal procedures	160
hospital care	60
inpatient care	60
minimally invasive procedures	160
preventive care	33
removal of lesion (e.g. growth)	127

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	146
Female	196

**Ethnicity**
Non-Hispanic White	308
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	151
From 75 to 84	80
85 and over	31
Less than 65	80

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2018

Hypertension	75
High Cholesterol	70
Stroke	0
Ischemic Heart Disease	39
Depression	28
Chronic Kidney Disease	35
Asthma	10
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	20
Chronic Obstructive Pulmonary Disease	27
Diabetes	37
Dementia	10
Cancer	21

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2019 were minimally invasive procedures, gastrointestinal procedures, diagnostic procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

catheterization	16
diagnostic procedures	120
doctor visit	289
excision	12
gastrointestinal procedures	131
hospital care	69
inpatient care	69
lymph node procedures	12
minimally invasive procedures	131
open surgery	12
preventive care	23
removal of lesion (e.g. growth)	108

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	142
Female	178

**Ethnicity**
Non-Hispanic White	292
Black	16
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	139
From 75 to 84	100
85 and over	24
Less than 65	57

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2019

Hypertension	75
High Cholesterol	64
Stroke	3
Ischemic Heart Disease	42
Depression	30
Chronic Kidney Disease	32
Asthma	9
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	20
Chronic Obstructive Pulmonary Disease	27
Diabetes	32
Dementia	7
Cancer	23

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2020 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

diagnostic procedures	64
doctor visit	211
gastrointestinal procedures	94
hospital care	17
inpatient care	17
minimally invasive procedures	94
preventive care	30
removal of lesion (e.g. growth)	64

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	117
Female	149

**Ethnicity**
Non-Hispanic White	244
Black	11
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	128
From 75 to 84	66
85 and over	27
Less than 65	45

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2020

Hypertension	75
High Cholesterol	67
Stroke	4
Ischemic Heart Disease	37
Depression	27
Chronic Kidney Disease	36
Asthma	15
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	23
Chronic Obstructive Pulmonary Disease	24
Diabetes	36
Dementia	9
Cancer	21

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2021 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

catheterization	12
diagnostic procedures	89
doctor visit	240
gastrointestinal procedures	134
hospital care	11
inpatient care	11
minimally invasive procedures	134
preventive care	45
removal of lesion (e.g. growth)	89

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	120
Female	148

**Ethnicity**
Non-Hispanic White	246
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	126
From 75 to 84	76
85 and over	23
Less than 65	43

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2021

Hypertension	75
High Cholesterol	71
Stroke	0
Ischemic Heart Disease	29
Depression	27
Chronic Kidney Disease	30
Asthma	12
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	31
Dementia	7
Cancer	22

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN during 2022 were removal of lesion (e.g. growth), minimally invasive procedures, diagnostic procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

catheterization	15
diagnostic procedures	97
doctor visit	190
gastrointestinal procedures	97
hospital care	26
inpatient care	26
minimally invasive procedures	97
removal of lesion (e.g. growth)	97

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	94
Female	130

**Ethnicity**
Non-Hispanic White	212
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	117
From 75 to 84	59
85 and over	18
Less than 65	30

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2022

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	29
Depression	22
Chronic Kidney Disease	22
Asthma	15
Osteoperosis	14
Atrial Fibrilation	17
Heart Failure	19
Chronic Obstructive Pulmonary Disease	25
Diabetes	39
Dementia	5
Cancer	35

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Douglas Aaron Rex, FACOS, DO for Medicare patients.

The highest averages for the top procedures that Dr. Douglas Aaron Rex, FACOS, DO treated as a general surgeon in Marion, IN were minimally invasive procedures, gastrointestinal procedures, diagnostic procedures and removal of lesion (e.g. growth).

catheterization	17
diagnostic procedures	91
doctor visit	186
excision	12
gastrointestinal procedures	116
hospital care	40
inpatient care	40
lymph node procedures	12
minimally invasive procedures	116
open surgery	12
preventive care	29
removal of lesion (e.g. growth)	90

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO.

**Gender**
Male	95
Female	122

**Ethnicity**
Black / African American	2
Asian / Pacific Islander	0
Non-Hispanic White	162
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	53
85 and over	15
Less than 65	36
65 to 74	101

Average of Total of Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Douglas Aaron Rex, FACOS, DO treated were hypertension, high cholesterol, ischemic heart disease and diabetes.

Hypertension	67
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	32
Depression	25
Chronic Kidney Disease	28
Asthma	11
Osteoporosis	6
Heart Failure	18
Chronic Obstructive Pulmonary Disease	21
Diabetes	32
Atrial Fibrillation	10
Dementia	4
Cancer	19

Education & Training

Dr. Douglas Aaron Rex, FACOS, DO graduated from Pikeville College School of Osteopathic Medicine in 2003. He is certified by the Board Certification: American Osteopathic Association - General Surgery and has a state license in Indiana.

Medical School: Pikeville College School of Osteopathic Medicine (2003)

Board Certification: Board Certification: American Osteopathic Association - General Surgery

Licensed In: Indiana

Affiliations & Hospitals

Dr. Douglas Aaron Rex, FACOS, DO is associated with these hospitals and organizations:

Marion Health

Marion General Hospital

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Douglas Aaron Rex, FACOS, DO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Covidien LP	$1,253 Parietex $529	PillCam $514	ProGrip $195	ProTack $15
Aries Pharmaceuticals, Inc.	$950 ELEVIEW $950
Ironwood Pharmaceuticals, Inc	$525 $525
Davol Inc.	$25 $25
Medtronic, Inc.	$22 GI GENIUS $22

**Types of Payments**
Consulting Fee	$1,475
Travel and Lodging	$958
Food and Beverage	$272
Education	$70

Biography

Dr. Douglas Rex specializes in general surgery and practices in Marion, IN. He is a graduate of Pikeville College School of Osteopathic Medicine. He is professionally affiliated with Marion Health and Marion General Hospital.

Select Year:

Dr. Douglas Aaron Rex, FACOS, DO

Office Locations

In The News

Noteworthy Medicare Patient Procedures Performed by Dr. Douglas Aaron Rex, FACOS, DO in 2023

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. Douglas Aaron Rex, FACOS, DO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Aaron Rex, FACOS, DO 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. Douglas Aaron Rex, FACOS, DO From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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