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Dr. John Gilbert Felker, MD

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Specializes in: Diagnostic Radiology

University of Kentucky College of Medicine (1990)

Professional interests include: fistula, abscess drainage, bone marrow biopsy, and more.

430 Warrenville Road Suite 110
Lisle, IL 60532

(630) 545-7880

Dr. John Gilbert Felker, MD is a diagnostic radiologist in SOUTH BEND, IN specializing in diagnostic radiology. He graduated from University of Kentucky College of Medicine in 1990 and has 36 years of experience. Dr. John Gilbert Felker, MD is affiliated with Saint Joseph Health System and Duly Health and Care.

Office Locations

211 N EDDY STREET
SOUTH BEND, IN 46617

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Duly Health and Care

430 Warrenville Road Suite 110
Lisle, IL 60532

(630) 545-7880

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Some issues Dr. John Gilbert Felker, MD can help you with:

Dialysis

Dialysis is a procedure that replicates renal (kidney) function by filtering patients' blood. When kidneys do not work properly, waste can accumulate in the blood and unbalanced chemicals can impair the body's critical functions. In order to stay healthy, a person without proper kidney function must receive dialysis. There are two forms of dialysis treatment: hemodialysis and peritoneal dialysis. Both forms of dialysis are recurring treatments that in many cases last throughout the lifetime of the affected patient. Patients who briefly lose renal function may slowly reduce the frequency of dialysis sessions until their kidneys recover. However, most patients who start on dialysis remain on dialysis for the rest of their lives or until they receive a kidney transplant.

A number of conditions can worsen renal function and lead to end-stage or acute kidney failure. When kidneys fail (i.e. nearly 90 percent of their function is lost), dialysis is typically prescribed. Conditions that cause chronic kidney failure (eventually requiring dialysis) include:

Type 1 and 2 Diabetes
Pyelonephritis, recurring kidney infection
Glomerulonephritis, inflammation of the kidney's filtering parts
Polycystic kidney disease
Interstitial nephritis, inflammation of the kidney's tubules
High blood pressure
Vesicoureteral reflux, improper bladder emptying

For hemodialysis (the more common form of dialysis), a patient will visit a hospital or clinic and be connected to a dialysis machine by a needle attached to a tube that draws blood from the arm. The drawn blood is transferred to the dialysis machine, where it is filtered and separated until clean. Waste products from the blood pass into a fluid called dialysate, which is pumped out of the machine into a waste receptacle. The machine also measures and helps ensure the blood has the appropriate level of fluid, electrolytes, and pH. A tube delivers the cleaned blood back into the patient's body. A dialysis session like this will typically last for three to four hours, with a patient undergoing dialysis around three times per week.

A second method of dialysis is known as peritoneal dialysis. Unlike hemodialysis, peritoneal dialysis can be performed at home by oneself after an initial surgery. To start, a physician (generally a surgeon) will make a small incision in the lower abdomen and insert and surgically attach a catheter (thin tube). At home, the patient connects a pump to the abdomen catheter, delivering dialysate (dialysis fluid) from a bag hanging on a wheeled stand. This fluid enters the peritoneal cavity (greater abdomen area containing the stomach, liver, and intestines) and collects waste through osmosis, where waste in the blood moves across a membrane and into the dialysate. This process continues for several hours until the fluid concentration is equal between the blood and dialysate, at which point the fluid can be drained. The fluid can then be passed through a machine called a cycler, which removes waste and allows for the dialysate to be reused. This process is repeated about four times per day. Dialysis patients must limit the amount of fluid they consume prior to receiving dialysis and should also avoid eating salty foods. The cycler cannot filter more than a certain amount of waste products from the blood.

Kidneys are important organs, and dialysis treatments are vital for those with renal dysfunction. For many, dialysis is not so much a medical procedure but a part of their normal life.

Thyroid Problems

Thyroid problems are a group of conditions that alter hormone regulation and metabolism. The thyroid is a small, butterfly-shaped gland located in the lower neck, just below the Adam's apple (laryngeal prominence) and larynx (voice box). Despite its small size, the thyroid has an outsized effect on the body by regulating hormones that control metabolism. Metabolism is the body's process of converting consumed food into fuel to power the entire body. Heart rate, weight, cholesterol, body temperature, and even physical growth and development are all affected by the metabolism.

When the thyroid malfunctions, the body is unable to properly process and allocate energy. Thyroid problems, such as hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid), cause irregular metabolism. In some cases, the body produces antibodies that attack the thyroid cells for unknown reasons. The damaged thyroid responds by releasing either too little or too much T3 and T4 thyroid hormones. Thyroid malfunctions may also arise from genetic causes or iodine deficiency. Thyroid problems may include:

Hashimoto's thyroiditis, an autoimmune disease that causes hypothyroidism
Graves' disease, an autoimmune disease that causes hyperthyroidism
Goiter
Thyroid nodule
Thyroid cancer

Hashimoto's is the leading cause of hypothyroidism, which is when the thyroid does not produce enough hormones to stimulate adequate metabolism. The condition is diagnosed by blood tests that measure TSH (thyroid stimulating hormone) and detect Hashimoto's antibodies. Symptoms of hypothyroidism include sluggish metabolism, inflammation, fatigue, weight gain, brittle hair, dry skin, and sensitivity to cold. To supplement impaired thyroid function, patients with Hashimoto's are typically prescribed synthetic thyroid hormone pills. Such patients may need to consume synthetic thyroids for the rest of their lives. Other treatments may include dietary changes, such as the avoidance of certain foods and medication to reduce inflammation. Frequent blood tests can inform patients if their TSH levels are within a normal range.

Grave's disease is most frequently the cause of hyperthyroidism, which is when the thyroid produces too many hormones, overstimulating one's metabolism. The condition is also diagnosed by blood tests that measure TSH and detect Grave's antibodies. Elevated heart rate, high blood pressure, sweating, bulging eyes, and weight loss are common symptoms of hyperthyroidism. Treatments for hyperthyroidism include oral radioactive iodine, which slowly shrinks the thyroid, slowing the production of excess thyroid hormone. Other anti-thyroid medications such as methimazole (Tapazole) also reduce the production of thyroid hormones. Blood pressure medications known as beta blockers can ease the increased heart rate caused by hyperthyroidism. If treatments are unsuccessful, patients may be prescribed a thyroidectomy, or surgery to remove part or all of the thyroid. Some patients with hyperthyroidism may require ophthalmological (eye medicine) treatments such as eye drops, prednisone, and surgery to reduce eye swelling and bulging.

Untreated thyroid disorders frequently lead to goiters or thyroid nodules. A thyroid goiter is a large lump that can be felt near the base of the neck and is made of swollen thyroid tissue or nodules (excess cell growth). Nodules and goiters are diagnosed by CT scan or ultrasound. Obstructive goiters can cause pain, coughing, and abnormal breathing. The most common cause of goiters is hyperthyroidism (overactive thyroid). However, Hashimoto's is also known to cause goiters or nodules. Goiters develop from continued damage from antibodies to the thyroid over time. At times, a goiter can result from a cancerous thyroid tumor. Most goiters and nodules are themselves benign.

The exact causes of thyroid cancer are unknown. People who develop thyroid cancer may or may not have another thyroid problem such as Hashimoto's or Grave's disease. Symptoms of thyroid cancer include a nodule that can be felt on the neck, hoarseness, difficulty swallowing, swelling in the neck, and neck and throat pain. CT and MRI scans are used to diagnose thyroid cancer. There are four types of thyroid cancer which vary in intensity. Thyroidectomy (thyroid removal surgery) is usually prescribed to treat thyroid cancer.

Thyroid problems are often long-term conditions that require some form of treatment. With regular monitoring and medication, many people with thyroid problems are able to lead active and fulfilling lives.

Noteworthy Medicare Patient Procedures Performed by Dr. John Gilbert Felker, MD in 2023

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

Top 10%

By Volume:

central DEXA

X-rays

In 2023, Dr. John Gilbert Felker, MD performed more central DEXA, and X-rays procedures for Medicare patients than 90% of providers in related specialties within Indiana.

Top 25%

By Volume:

biopsy

chest CT scan

diagnostic imaging

image-guided core breast biopsy

targeted breast ultrasound

women's imaging

In 2012, Dr. John Gilbert Felker, MD performed more biopsy, chest CT scan, diagnostic imaging, image-guided core breast biopsy, targeted breast ultrasound, and women's imaging procedures for Medicare patients than 75% of providers in related specialties within Indiana.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2012 were X-rays, thoracic (chest) imaging, CT scan and brain imaging (neuroimaging).

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	702
brain imaging (neuroimaging)	845
CT scan	1965
hip imaging	158
MRI (magnetic resonance imaging)	164
musculoskeletal imaging	355
neck imaging	74
pelvic imaging	657
spinal procedures	396
thoracic (chest) imaging	3198
ultrasound (sonogram)	222
vascular procedures	194
X-rays	3531

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2013 were X-rays, thoracic (chest) imaging, CT scan and brain imaging (neuroimaging).

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	647
brain imaging (neuroimaging)	657
CT scan	1537
hip imaging	84
MRI (magnetic resonance imaging)	160
musculoskeletal imaging	205
neck imaging	67
pelvic imaging	579
spinal procedures	207
thoracic (chest) imaging	2794
ultrasound (sonogram)	185
vascular procedures	150
X-rays	2880

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	1312
Female	1613

**Ethnicity**
Non-Hispanic White	2610
Black	262
Hispanic	15
Asian	0
Other	27
Native American	0

**Age**
From 65 to 74	891
From 75 to 84	803
85 and over	579
Less than 65	652

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2013

Hypertension	75
High Cholesterol	65
Stroke	12
Ischemic Heart Disease	58
Depression	41
Chronic Kidney Disease	42
Asthma	17
Osteoperosis	10
Atrial Fibrilation	21
Heart Failure	44
Chronic Obstructive Pulmonary Disease	36
Diabetes	41
Dementia	20
Cancer	17

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2014 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	670
brain imaging (neuroimaging)	523
breast procedures	170
CT scan	1419
diagnostic imaging	13
hip imaging	137
MRI (magnetic resonance imaging)	116
musculoskeletal imaging	358
neck imaging	12
pelvic imaging	592
preventive care	157
spinal procedures	362
thoracic (chest) imaging	2569
ultrasound (sonogram)	323
vascular procedures	200
women's imaging	170
X-rays	3239

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	1636
Female	2452

**Ethnicity**
Non-Hispanic White	3815
Black	206
Hispanic	19
Asian	0
Other	37
Native American	0

**Age**
From 65 to 74	1376
From 75 to 84	1108
85 and over	764
Less than 65	840

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2014

Hypertension	75
High Cholesterol	64
Stroke	9
Ischemic Heart Disease	51
Depression	34
Chronic Kidney Disease	38
Asthma	12
Osteoperosis	12
Atrial Fibrilation	20
Heart Failure	37
Chronic Obstructive Pulmonary Disease	33
Diabetes	39
Dementia	18
Cancer	15

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2015 were X-rays, thoracic (chest) imaging, CT scan and musculoskeletal imaging.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	762
brain imaging (neuroimaging)	433
breast procedures	643
catheterization	25
CT scan	1293
diagnostic imaging	106
hip imaging	248
MRI (magnetic resonance imaging)	106
musculoskeletal imaging	799
neck imaging	48
nuclear scan	37
pelvic imaging	592
preventive care	473
spinal procedures	532
thoracic (chest) imaging	2605
ultrasound (sonogram)	674
vascular procedures	292
women's imaging	665
X-rays	4310

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	4128
Female	7260

**Ethnicity**
Non-Hispanic White	10946
Black	300
Hispanic	0
Asian	0
Other	98
Native American	0

**Age**
From 65 to 74	4148
From 75 to 84	3246
85 and over	2054
Less than 65	1940

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2015

Hypertension	75
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	43
Depression	31
Chronic Kidney Disease	35
Asthma	18
Osteoperosis	14
Atrial Fibrilation	17
Heart Failure	29
Chronic Obstructive Pulmonary Disease	29
Diabetes	36
Dementia	14
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2016 were X-rays, thoracic (chest) imaging, women's imaging and breast procedures.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	521
brain imaging (neuroimaging)	316
breast procedures	891
catheterization	56
CT scan	845
diagnostic imaging	147
diagnostic procedures	15
gastrointestinal procedures	24
image guided procedures	15
minimally invasive procedures	15
minor procedures	15
MRI (magnetic resonance imaging)	87
musculoskeletal imaging	458
neck imaging	25
nuclear scan	13
pelvic imaging	342
preventive care	686
spinal procedures	399
thoracic (chest) imaging	1809
ultrasound (sonogram)	482
vascular procedures	189
women's imaging	894
X-rays	3365

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	1655
Female	3140

**Ethnicity**
Non-Hispanic White	4577
Black	145
Hispanic	19
Asian	0
Other	43
Native American	0

**Age**
From 65 to 74	1823
From 75 to 84	1428
85 and over	810
Less than 65	734

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2016

Hypertension	75
High Cholesterol	60
Stroke	6
Ischemic Heart Disease	42
Depression	29
Chronic Kidney Disease	39
Asthma	28
Osteoperosis	14
Atrial Fibrilation	16
Heart Failure	26
Chronic Obstructive Pulmonary Disease	28
Diabetes	35
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2017 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	699
aspiration	32
brain imaging (neuroimaging)	398
breast procedures	475
catheterization	15
CT scan	1308
diagnostic imaging	63
gastrointestinal procedures	25
injections	16
MRI (magnetic resonance imaging)	76
musculoskeletal imaging	317
neck imaging	31
pelvic imaging	534
pleural drainage	16
preventive care	412
spinal procedures	336
thoracic (chest) imaging	2157
ultrasound (sonogram)	386
vascular procedures	141
women's imaging	486
X-rays	3009

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	1903
Female	3066

**Ethnicity**
Non-Hispanic White	4728
Black	153
Hispanic	0
Asian	0
Other	57
Native American	0

**Age**
From 65 to 74	1797
From 75 to 84	1535
85 and over	837
Less than 65	800

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2017

Hypertension	75
High Cholesterol	56
Stroke	8
Ischemic Heart Disease	45
Depression	30
Chronic Kidney Disease	44
Asthma	9
Osteoperosis	13
Atrial Fibrilation	18
Heart Failure	29
Chronic Obstructive Pulmonary Disease	33
Diabetes	37
Dementia	17
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2018 were CT scan, abdominal imaging, brain imaging (neuroimaging) and pelvic imaging.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	407
aspiration	95
brain imaging (neuroimaging)	315
catheterization	37
CT scan	754
diagnostic procedures	38
image guided procedures	38
injections	15
minimally invasive procedures	53
minor procedures	38
MRI (magnetic resonance imaging)	12
musculoskeletal imaging	102
neck imaging	37
pain management	15
pelvic imaging	283
pleural drainage	41
spinal procedures	106
thoracic (chest) imaging	144
ultrasound (sonogram)	241
vascular procedures	129
X-rays	202

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	1193
Female	1573

**Ethnicity**
Non-Hispanic White	2666
Black	57
Hispanic	0
Asian	0
Other	25
Native American	0

**Age**
From 65 to 74	868
From 75 to 84	886
85 and over	552
Less than 65	460

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2018

Hypertension	75
High Cholesterol	63
Stroke	11
Ischemic Heart Disease	50
Depression	35
Chronic Kidney Disease	52
Asthma	8
Osteoperosis	9
Atrial Fibrilation	23
Heart Failure	37
Chronic Obstructive Pulmonary Disease	39
Diabetes	42
Dementia	22
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2019 were CT scan, brain imaging (neuroimaging), abdominal imaging and pelvic imaging.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	160
aspiration	52
brain imaging (neuroimaging)	165
CT scan	359
image guided procedures	13
injections	13
minimally invasive procedures	13
musculoskeletal imaging	31
pain management	13
pelvic imaging	118
pleural drainage	27
spinal procedures	46
thoracic (chest) imaging	57
ultrasound (sonogram)	58
vascular procedures	43
X-rays	56

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	674
Female	916

**Ethnicity**
Non-Hispanic White	1499
Black	53
Hispanic	0
Asian	0
Other	21
Native American	0

**Age**
From 65 to 74	501
From 75 to 84	453
85 and over	349
Less than 65	287

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2019

Hypertension	75
High Cholesterol	62
Stroke	9
Ischemic Heart Disease	50
Depression	36
Chronic Kidney Disease	57
Asthma	8
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	46
Chronic Obstructive Pulmonary Disease	41
Diabetes	42
Dementia	25
Cancer	14

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2020 were X-rays, breast procedures, women's imaging and preventive care.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	64
aspiration	32
brain imaging (neuroimaging)	48
breast procedures	838
CT scan	153
diagnostic imaging	140
diagnostic procedures	12
image guided procedures	12
minimally invasive procedures	12
minor procedures	12
musculoskeletal imaging	148
neck imaging	41
nuclear scan	40
pelvic imaging	64
pleural drainage	12
preventive care	597
spinal procedures	13
thoracic (chest) imaging	52
ultrasound (sonogram)	155
vascular procedures	14
women's imaging	826
X-rays	869

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	514
Female	1376

**Ethnicity**
Non-Hispanic White	1619
Black	165
Hispanic	68
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	936
From 75 to 84	541
85 and over	214
Less than 65	199

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2020

Hypertension	75
High Cholesterol	69
Stroke	8
Ischemic Heart Disease	39
Depression	31
Chronic Kidney Disease	39
Asthma	8
Osteoperosis	14
Atrial Fibrilation	15
Heart Failure	26
Chronic Obstructive Pulmonary Disease	24
Diabetes	35
Dementia	16
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2021 were X-rays, breast procedures, women's imaging and preventive care.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	108
aspiration	39
brain imaging (neuroimaging)	90
breast procedures	899
catheterization	11
CT scan	280
diagnostic imaging	164
diagnostic procedures	16
gastrointestinal procedures	14
image guided procedures	16
lymph node procedures	12
minimally invasive procedures	16
minor procedures	16
MRI (magnetic resonance imaging)	13
musculoskeletal imaging	406
neck imaging	55
nuclear scan	85
pelvic imaging	87
pleural drainage	17
preventive care	631
spinal procedures	65
thoracic (chest) imaging	94
ultrasound (sonogram)	218
vascular procedures	33
women's imaging	883
X-rays	1185

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	787
Female	1878

**Ethnicity**
Non-Hispanic White	2291
Black	244
Hispanic	84
Asian	14
Other	32
Native American	0

**Age**
From 65 to 74	1229
From 75 to 84	846
85 and over	334
Less than 65	256

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2021

Hypertension	75
High Cholesterol	70
Stroke	9
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	41
Asthma	9
Osteoperosis	15
Atrial Fibrilation	18
Heart Failure	29
Chronic Obstructive Pulmonary Disease	27
Diabetes	35
Dementia	18
Cancer	16

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN during 2022 were X-rays, breast procedures, women's imaging and preventive care.

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

abdominal imaging	156
breast procedures	1231
CT scan	298
diagnostic imaging	217
diagnostic procedures	50
image guided procedures	69
minimally invasive procedures	69
minor procedures	50
musculoskeletal imaging	552
neck imaging	16
pelvic imaging	131
preventive care	859
thoracic (chest) imaging	167
ultrasound (sonogram)	127
women's imaging	1162
X-rays	1628

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	412
Female	1764

**Ethnicity**
Non-Hispanic White	1906
Black	113
Hispanic	53
Asian	0
Other	69
Native American	0

**Age**
From 65 to 74	1206
From 75 to 84	692
85 and over	191
Less than 65	87

Conditions of Medicare patients treated by Dr. John Gilbert Felker, MD in 2022

Hypertension	71
High Cholesterol	74
Stroke	6
Ischemic Heart Disease	19
Depression	22
Chronic Kidney Disease	17
Asthma	9
Osteoperosis	21
Atrial Fibrilation	14
Heart Failure	12
Chronic Obstructive Pulmonary Disease	15
Diabetes	25
Dementia	4
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John Gilbert Felker, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Gilbert Felker, MD treated as a diagnostic radiologist in SOUTH BEND, IN were X-rays, thoracic (chest) imaging, CT scan and breast procedures.

abdominal imaging	445
aspiration	50
brain imaging (neuroimaging)	379
breast procedures	735
catheterization	28
CT scan	928
diagnostic imaging	121
diagnostic procedures	26
gastrointestinal procedures	21
hip imaging	156
image guided procedures	27
injections	14
lymph node procedures	12
minimally invasive procedures	29
minor procedures	26
MRI (magnetic resonance imaging)	91
musculoskeletal imaging	339
neck imaging	40
nuclear scan	43
pain management	14
pelvic imaging	361
pleural drainage	22
preventive care	545
spinal procedures	246
thoracic (chest) imaging	1422
ultrasound (sonogram)	279
vascular procedures	138
women's imaging	726
X-rays	2206

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Gilbert Felker, MD.

**Gender**
Male	1292
Female	2276

**Ethnicity**
Black / African American	154
Asian / Pacific Islander	1
Non-Hispanic White	3332
Native American / Alaskan Native	0
Hispanic	23
Other	37

**Age**
75 to 84	1048
85 and over	607
Less than 65	568
65 to 74	1343

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

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

Hypertension	67
High Cholesterol	58
Stroke	7
Ischemic Heart Disease	39
Depression	29
Chronic Kidney Disease	36
Asthma	11
Osteoporosis	11
Heart Failure	28
Chronic Obstructive Pulmonary Disease	27
Diabetes	33
Atrial Fibrillation	16
Dementia	15
Cancer	13

Education & Training

Dr. John Gilbert Felker, MD graduated from University of Kentucky College of Medicine in 1990. He completed residency at Mallinckrodt Institute of Radiology. He is certified by the American Board of Radiology and has a state license in Illinois.

Medical School: University of Kentucky College of Medicine (1990)

Residency: Mallinckrodt Institute of Radiology (1996)

Board Certification: American Board of Radiology (1996)

Licensed In: Illinois

Affiliations & Hospitals

Dr. John Gilbert Felker, MD is associated with these hospitals and organizations:

Saint Joseph Health System

Duly Health and Care

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General Payments

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

**Payments by Company**
Stryker Corporation	$182 SPINEJACK $90	IVAS $77	IVS Vertebral Augmentation Products $15
Bard Peripheral Vascular, Inc.	$145 $145
Medtronic USA, Inc.	$68 KYPHON Balloon Kyphoplasty $68
Boston Scientific Corporation	$35 Angiojet $18	GENERAL - ATHERECTOMY $17

**Types of Payments**
Food and Beverage	$430

Biography

Dr. John Felker is a specialist in diagnostic radiology. His areas of expertise include hepatobiliary (HIDA) scan, thyroid problems, and diagnostic imaging. He is professionally affiliated with Saint Joseph Health System and Duly Health and Care. After attending the University of Kentucky College of Medicine for medical school, Dr. Felker completed his residency training at Barnes-Jewish Hospital and Mallinckrodt Institute of Radiology. According to Saint Joseph Health System, he is currently accepting new patients at his office in.