Procedure Volume Patient Data Patient Conditions Reviews General Payments Back to Top

Home > IN Providers

Dr. John Glenn Mathis, MD

(No ratings)

Specializes in: Adult Gastroenterology

Indiana University School of Medicine (1975)

Professional interests include: gastrointestinal problems (digestive disorders)

17501 Generations Drive
South Bend, IN 46635

(574) 234-0049

Dr. John Glenn Mathis, MD is a gastroenterologist in South Bend, IN specializing in adult gastroenterology. He graduated from Indiana University School of Medicine in 1975 and has 51 years of experience. Dr. John Glenn Mathis, MD is affiliated with Saint Joseph Health System and MICHIANA GASTROENTEROLOGY, INC.

Office Locations

17501 Generations Drive
South Bend, IN 46635

open_in_new

Saint Joseph Health System

1919 Lake Avenue Suite 107
Plymouth, IN 46563

(574) 234-0049

open_in_new

Some issues Dr. John Glenn Mathis, MD can help you with:

Gastrointestinal Problems (Digestive Disorders)

The gastrointestinal system, or GI tract, is the name given to a collection of organs that work together to digest food. These organs fit together in a long tube, running from the mouth to the anus, and include the esophagus, stomach, and intestines, among others. With so many parts working together, complicated by today's busy lifestyles and diets, digestive problems are common. As many as 1 in 3 Americans have a digestive or GI disorder. There are a huge variety of digestive problems, but the most common are IBS, constipation, GERD, hemorrhoids, and ulcers.

IBS, or irritable bowel syndrome, happens when the muscles surrounding the colon contract too easily or frequently. The result is abdominal pain, cramps, diarrhea or constipation, gas and bloating. IBS attacks can often be brought on by specific triggers, so a key part of treatment is learning which foods trigger IBS attacks and avoiding them. Treatment also includes exercise, avoiding stress, and medications if needed.

Constipation, or large, hard, or infrequent stools, happens to everyone at some point. It can be caused by a disruption in routine or food, or by eating a diet without many fresh fruits and vegetables. Although it is uncomfortable, constipation is common and usually not serious, but it can sometimes become chronic. Adding fiber to the diet, exercising, and taking medications may help.

GERD, or gastroesophageal reflux disease, is a severe form of chronic heartburn where stomach acid spills back up into the esophagus. Left untreated, the acid may even eat away at the esophagus and cause serious damage. Treatment includes changing the diet to avoid trigger foods, losing weight if needed, medications, or even surgery.

Hemorrhoids are blood vessels around the rectum that become irritated, swollen or torn while straining during a bowel movement. They are most often caused by constipation, but can also be caused by pregnancy, diarrhea, or simply a genetic predisposition towards hemorrhoids. Treatment involves first treating any constipation issues, then keeping the area clean and soothed until it has healed. If these measures are ineffective, surgery is sometimes used.

Peptic ulcers are sores or spots of inflammation in the lining of the stomach or close to the stomach in the small intestine. Usually this area is coated with a protective lining that shields the tissue from the strong stomach acid, but a break in the lining can let acid in, causing the sores. It used to be thought that stress caused ulcers, but now it is known that is not the case. Most often, they are caused by an infection by H. pylori bacteria, but ulcers can also be caused by alcohol abuse or overuse of aspirin, ibuprofen, naproxen, or other NSAIDS. The symptoms of an ulcer are pain, hunger, nausea, and fatigue.

Gastrointestinal problems, perhaps more than any other area, are markedly affected by lifestyle. Many disorders can be prevented or treated at least in part by eating a healthy diet high in fiber, exercising regularly, drinking enough water, and limiting alcohol intake. Still, the frequency of digestive disorders means that even the healthiest person can be affected by them. Anyone who notices blood in their stool, experiences abdominal pain, unexplained weight loss, or any significant change in bowel movements should see a doctor.

Noteworthy Medicare Patient Procedures Performed by Dr. John Glenn Mathis, MD in 2023

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

Top 10%

By Volume:

colonoscopy

endoscopy

gastrointestinal procedures

preventive care

screening colonoscopy

In 2023, Dr. John Glenn Mathis, MD performed more colonoscopy, endoscopy, gastrointestinal procedures, preventive care, and screening colonoscopy procedures for Medicare patients than 90% of providers in related specialties within Indiana.

Top 25%

By Volume:

colonoscopy with biopsy

colonoscopy with lesion removal

EGD with biopsy

EGD with esophageal dilation

EGD with lesion removal

gastrointestinal biopsy

removal of lesion

By Affordability:

EGD for treatment of gastrointestinal bleeding

hospital care

inpatient care

inpatient hospital care

upper endoscopy for treatment of gastrointestinal bleeding

In 2012, among providers in related specialties within Indiana, Dr. John Glenn Mathis, MD performed more colonoscopy with biopsy, colonoscopy with lesion removal, EGD with biopsy, EGD with esophageal dilation, EGD with lesion removal, gastrointestinal biopsy, and removal of lesion (e.g. growth) procedures for Medicare patients than 75% of them and he also had a list price for EGD for treatment of gastrointestinal bleeding, hospital care, inpatient care, inpatient hospital care (for patient admitted to hospital), and upper endoscopy for treatment of gastrointestinal bleeding 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. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2012 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

anastomosis	14
catheterization	14
diagnostic procedures	496
doctor visit	394
esophageal dilation	87
gastrointestinal procedures	755
hospital care	438
inpatient care	438
minimally invasive procedures	755
preventive care	101
removal of lesion (e.g. growth)	496

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2013 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

anastomosis	31
catheterization	31
diagnostic procedures	489
doctor visit	425
esophageal dilation	80
gastrointestinal procedures	754
hospital care	495
inpatient care	495
minimally invasive procedures	754
preventive care	102
removal of lesion (e.g. growth)	489

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	324
Female	500

**Ethnicity**
Non-Hispanic White	765
Black	42
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	320
From 75 to 84	283
85 and over	140
Less than 65	81

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2013

Hypertension	68
High Cholesterol	53
Stroke	5
Ischemic Heart Disease	35
Depression	19
Chronic Kidney Disease	25
Asthma	6
Osteoperosis	8
Atrial Fibrilation	14
Heart Failure	22
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	11
Cancer	14

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2014 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

anastomosis	17
catheterization	17
diagnostic procedures	476
doctor visit	419
esophageal dilation	83
gastrointestinal procedures	733
hospital care	449
inpatient care	449
minimally invasive procedures	733
preventive care	91
removal of lesion (e.g. growth)	476

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	347
Female	509

**Ethnicity**
Non-Hispanic White	766
Black	66
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	363
From 75 to 84	289
85 and over	110
Less than 65	94

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2014

Hypertension	67
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	30
Depression	21
Chronic Kidney Disease	25
Asthma	5
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	30
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2015 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

anastomosis	16
catheterization	16
diagnostic procedures	531
doctor visit	397
esophageal dilation	96
gastrointestinal procedures	792
hospital care	348
inpatient care	348
minimally invasive procedures	792
preventive care	86
removal of lesion (e.g. growth)	531

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	724
Female	986

**Ethnicity**
Non-Hispanic White	1570
Black	96
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	788
From 75 to 84	506
85 and over	250
Less than 65	166

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2015

Hypertension	69
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	34
Depression	23
Chronic Kidney Disease	24
Asthma	12
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	20
Chronic Obstructive Pulmonary Disease	17
Diabetes	31
Dementia	11
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2016 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

anastomosis	13
catheterization	13
diagnostic procedures	522
doctor visit	418
esophageal dilation	93
gastrointestinal procedures	784
hospital care	437
inpatient care	437
minimally invasive procedures	784
preventive care	88
removal of lesion (e.g. growth)	522

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	348
Female	496

**Ethnicity**
Non-Hispanic White	763
Black	51
Hispanic	0
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	409
From 75 to 84	218
85 and over	105
Less than 65	112

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2016

Hypertension	68
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	33
Depression	23
Chronic Kidney Disease	30
Asthma	23
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	21
Chronic Obstructive Pulmonary Disease	20
Diabetes	30
Dementia	10
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2017 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

anastomosis	18
catheterization	18
diagnostic procedures	549
doctor visit	363
esophageal dilation	75
gastrointestinal procedures	814
hospital care	320
inpatient care	320
minimally invasive procedures	814
preventive care	98
removal of lesion (e.g. growth)	549

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	396
Female	504

**Ethnicity**
Non-Hispanic White	817
Black	44
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	437
From 75 to 84	262
85 and over	110
Less than 65	91

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2017

Hypertension	71
High Cholesterol	48
Stroke	6
Ischemic Heart Disease	32
Depression	24
Chronic Kidney Disease	36
Asthma	8
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	19
Chronic Obstructive Pulmonary Disease	19
Diabetes	31
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2018 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

diagnostic procedures	480
doctor visit	336
esophageal dilation	93
gastrointestinal procedures	737
hospital care	231
inpatient care	231
minimally invasive procedures	737
preventive care	98
removal of lesion (e.g. growth)	480

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	361
Female	445

**Ethnicity**
Non-Hispanic White	749
Black	27
Hispanic	0
Asian	0
Other	17
Native American	0

**Age**
From 65 to 74	392
From 75 to 84	257
85 and over	94
Less than 65	63

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2018

Hypertension	70
High Cholesterol	55
Stroke	7
Ischemic Heart Disease	33
Depression	26
Chronic Kidney Disease	33
Asthma	6
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	19
Chronic Obstructive Pulmonary Disease	18
Diabetes	28
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2019 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

diagnostic procedures	478
doctor visit	343
esophageal dilation	71
gastrointestinal procedures	735
hospital care	181
inpatient care	181
minimally invasive procedures	735
preventive care	116
removal of lesion (e.g. growth)	478

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	320
Female	474

**Ethnicity**
Non-Hispanic White	724
Black	35
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	410
From 75 to 84	249
85 and over	79
Less than 65	56

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2019

Hypertension	69
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	34
Depression	27
Chronic Kidney Disease	31
Asthma	8
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	19
Chronic Obstructive Pulmonary Disease	18
Diabetes	26
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2020 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

diagnostic procedures	384
doctor visit	333
esophageal dilation	50
gastrointestinal procedures	569
hospital care	57
inpatient care	57
minimally invasive procedures	569
preventive care	89
removal of lesion (e.g. growth)	384

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	300
Female	366

**Ethnicity**
Non-Hispanic White	605
Black	24
Hispanic	0
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	362
From 75 to 84	204
85 and over	56
Less than 65	44

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2020

Hypertension	66
High Cholesterol	51
Stroke	4
Ischemic Heart Disease	31
Depression	23
Chronic Kidney Disease	28
Asthma	7
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	28
Dementia	10
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2021 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

diagnostic procedures	359
doctor visit	327
esophageal dilation	55
gastrointestinal procedures	561
hospital care	83
inpatient care	83
minimally invasive procedures	578
preventive care	84
removal of lesion (e.g. growth)	359

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	295
Female	384

**Ethnicity**
Non-Hispanic White	617
Black	23
Hispanic	0
Asian	0
Other	22
Native American	0

**Age**
From 65 to 74	334
From 75 to 84	216
85 and over	69
Less than 65	60

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2021

Hypertension	69
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	31
Depression	27
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	20
Chronic Obstructive Pulmonary Disease	18
Diabetes	26
Dementia	7
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN during 2022 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

balloon dilation	25
diagnostic procedures	436
doctor visit	314
esophageal dilation	86
gastrointestinal procedures	670
hospital care	95
inpatient care	95
liver imaging	11
minimally invasive procedures	699
preventive care	109
removal of lesion (e.g. growth)	436
ultrasound (sonogram)	11

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	327
Female	397

**Ethnicity**
Non-Hispanic White	653
Black	20
Hispanic	0
Asian	0
Other	34
Native American	0

**Age**
From 65 to 74	363
From 75 to 84	247
85 and over	67
Less than 65	47

Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD in 2022

Hypertension	75
High Cholesterol	72
Stroke	6
Ischemic Heart Disease	23
Depression	23
Chronic Kidney Disease	21
Asthma	8
Osteoperosis	17
Atrial Fibrilation	19
Heart Failure	16
Chronic Obstructive Pulmonary Disease	18
Diabetes	26
Dementia	5
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John Glenn Mathis, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Glenn Mathis, MD treated as a gastroenterologist in South Bend, IN were minimally invasive procedures, gastrointestinal procedures, diagnostic procedures and removal of lesion (e.g. growth).

anastomosis	18
balloon dilation	25
catheterization	18
diagnostic procedures	472
doctor visit	369
esophageal dilation	79
gastrointestinal procedures	718
hospital care	284
inpatient care	284
liver imaging	11
minimally invasive procedures	722
preventive care	96
removal of lesion (e.g. growth)	472
ultrasound (sonogram)	11

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Glenn Mathis, MD.

**Gender**
Male	340
Female	460

**Ethnicity**
Black / African American	38
Asian / Pacific Islander	0
Non-Hispanic White	729
Hispanic	0
Native American / Alaskan Native	0
Other	14

**Age**
75 to 84	248
85 and over	98
Less than 65	74
65 to 74	379

Average of Total of Conditions of Medicare patients treated by Dr. John Glenn Mathis, MD From 2012 - 2022

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

Hypertension	62
High Cholesterol	50
Stroke	4
Ischemic Heart Disease	28
Depression	21
Chronic Kidney Disease	25
Asthma	8
Osteoporosis	9
Heart Failure	17
Chronic Obstructive Pulmonary Disease	15
Diabetes	25
Atrial Fibrillation	12
Cancer	12
Dementia	8

Education & Training

Dr. John Glenn Mathis, MD graduated from Indiana University School of Medicine in 1975. He completed residency at Indiana University Affiliated Hospitals. He is certified by the Gastroenterology, Gastroenterology, American Board of Internal Medicine Subspecialty and has a state license in Indiana.

Medical School: Indiana University School of Medicine (1975)

Residency: Indiana University Affiliated Hospitals (1979)

Board Certification: Gastroenterology, Gastroenterology, American Board of Internal Medicine Subspecialty (1981)

Licensed In: Indiana

Affiliations & Hospitals

Dr. John Glenn Mathis, MD is associated with these hospitals and organizations:

Saint Joseph Health System

MICHIANA GASTROENTEROLOGY, INC

Ratings & Reviews

Dr. John Glenn Mathis, MD does not have any reviews yet, be the first to leave a review of Dr. John Glenn Mathis, MD here: Leave a Review

(No ratings)

Leave a Review

General Payments

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

**Payments by Company**
AbbVie, Inc.	$2,895 Humira $1,569	Creon $347	Lupron $206	Mavyret $85	Moderiba $67	Other $621
AbbVie Inc.	$2,665 Rinvoq $731	Skyrizi $672	Humira $490	Creon $330	Mavyret $197	Other $246
Janssen Biotech, Inc.	$1,930 STELARA $1,054	SIMPONI $469	SIMPONI ARIA $198	REMICADE $173	OLYSIO $35
Takeda Pharmaceuticals U.S.A., Inc.	$1,349 ENTYVIO $961	GATTEX $286	Dexilant $57	AMITIZA $29	MOTEGRITY $16
Takeda Pharmaceuticals America, Inc.	$1,189 ENTYVIO $630	AMITIZA $343	Dexilant $216
Other	$9,793 ZEPOSIA $625	Trulance $421	DUPIXENT $414	Uceris $375	LINZESS $328	Other $7,630

**Types of Payments**
Food and Beverage	$19,155
Education	$516
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$150

Biography

Dr. John Mathis is a specialist in adult gastroenterology. After attending Indiana University School of Medicine, he completed his residency training at a hospital affiliated with Indiana University. Dr. Mathis's areas of clinical interest consist of gastrointestinal problems (digestive disorders) and internal medicine. He is professionally affiliated with Saint Joseph Health System.