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Dr. Nathaniel Robert Stewart, MD

Accepting New Patients

(574 Ratings)

Specializes in: Internal Medicine (Adult Medicine) and Family Medicine

Indiana University School of Medicine (2012)

1122 S Ironwood Drive
South Bend, IN 46615

(574) 335-8399

Dr. Nathaniel Robert Stewart, MD is an internist in South Bend, IN specializing in internal medicine (adult medicine) and family medicine. He graduated from Indiana University School of Medicine in 2012 and has 14 years of experience. Dr. Nathaniel Robert Stewart, MD is affiliated with Saint Joseph Health System.

Office Locations

1122 S Ironwood Drive
South Bend, IN 46615

(574) 335-8399

(574) 335-0786

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12563 Adams Road
Granger, IN 46530

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12563 State Rd 23
Granger, IN 46530

(574) 335-8300

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1949 Hospital Drive
Martinsville, IN 46151

(765) 342-8383

(765) 349-8413

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Noteworthy Medicare Patient Procedures Performed by Dr. Nathaniel Robert Stewart, MD in 2024

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

Top 5%

By Volume:

A1C test

lab tests

preventive care

By Affordability:

creatinine test

creatinine urine test

kidney function tests

In 2024, among providers in related specialties within Indiana, Dr. Nathaniel Robert Stewart, MD performed more A1C test, lab tests, and preventive care procedures for Medicare patients than 95% of them and he also had a list price for creatinine test, creatinine urine test, and kidney function tests that was lower than the list prices billed to Medicare by 95% 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.

Top 10%

By Volume:

blood draw

flu shot

phlebotomy for lab tests

By Affordability:

glycated protein test

In 2024, among providers in related specialties within Indiana, Dr. Nathaniel Robert Stewart, MD performed more blood draw, flu shot, and phlebotomy for lab tests procedures for Medicare patients than 90% of them and he also had a list price for A1C test, blood tests, diabetes management, diabetes screening, and glycated protein test that was lower than the list prices billed to Medicare by 90% 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.

Top 25%

By Volume:

rapid flu test

By Affordability:

albumin test

microalbumin test

microalbumin urine test

screening test

urinalysis

In 2012, among providers in related specialties within Indiana, Dr. Nathaniel Robert Stewart, MD performed more rapid flu test procedures for Medicare patients than 75% of them and he also had a list price for albumin test, microalbumin test, microalbumin urine test, screening test, and urinalysis 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

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Ethnicity**
Non-Hispanic White	12
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2015 were hospital care and inpatient care.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

doctor visit	143
hospital care	49
inpatient care	49

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	146
Female	204

**Ethnicity**
Non-Hispanic White	316
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	86
From 75 to 84	42
85 and over	26
Less than 65	196

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2015

Hypertension	64
High Cholesterol	38
Stroke	9
Ischemic Heart Disease	31
Depression	47
Chronic Kidney Disease	21
Asthma	26
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	17
Chronic Obstructive Pulmonary Disease	28
Diabetes	28
Dementia	10
Cancer	6

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2016 were preventive care and vaccines.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

doctor visit	291
preventive care	29
vaccines	29

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	71
Female	98

**Ethnicity**
Non-Hispanic White	157
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	29
85 and over	11
Less than 65	67

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2016

Hypertension	58
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	28
Depression	31
Chronic Kidney Disease	22
Asthma	22
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	16
Chronic Obstructive Pulmonary Disease	19
Diabetes	25
Dementia	10
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2017 were preventive care, vaccines, lab tests and diabetes management.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

diabetes management	36
doctor visit	450
lab tests	36
preventive care	93
vaccines	57

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	122
Female	156

**Ethnicity**
Non-Hispanic White	258
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	111
From 75 to 84	70
85 and over	30
Less than 65	67

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2017

Hypertension	57
High Cholesterol	37
Stroke	0
Ischemic Heart Disease	28
Depression	24
Chronic Kidney Disease	19
Asthma	9
Osteoperosis	6
Atrial Fibrilation	7
Heart Failure	12
Chronic Obstructive Pulmonary Disease	19
Diabetes	24
Dementia	8
Cancer	5

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2018 were preventive care, vaccines, lab tests and diabetes management.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

diabetes management	61
doctor visit	565
lab tests	73
preventive care	182
vaccines	121

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	158
Female	162

**Ethnicity**
Non-Hispanic White	305
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	143
From 75 to 84	74
85 and over	36
Less than 65	67

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2018

Hypertension	63
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	27
Depression	22
Chronic Kidney Disease	23
Asthma	5
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	15
Chronic Obstructive Pulmonary Disease	14
Diabetes	30
Dementia	10
Cancer	7

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2019 were preventive care, blood draw, lab tests and vaccines.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

blood draw	205
diabetes management	137
doctor visit	850
lab tests	201
preventive care	329
vaccines	192

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	246
Female	206

**Ethnicity**
Non-Hispanic White	422
Black	16
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	211
From 75 to 84	140
85 and over	61
Less than 65	40

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2019

Hypertension	71
High Cholesterol	59
Stroke	3
Ischemic Heart Disease	26
Depression	16
Chronic Kidney Disease	21
Asthma	4
Osteoperosis	5
Atrial Fibrilation	12
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	29
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2020 were preventive care, lab tests, diabetes management and vaccines.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

blood draw	85
cardiac procedures	12
diabetes management	140
doctor visit	767
lab tests	198
preventive care	286
vaccines	114

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	227
Female	184

**Ethnicity**
Non-Hispanic White	391
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	206
From 75 to 84	115
85 and over	55
Less than 65	35

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2020

Hypertension	68
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	23
Depression	15
Chronic Kidney Disease	19
Asthma	4
Osteoperosis	6
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	8
Diabetes	29
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2021 were preventive care, lab tests, diabetes management and blood draw.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

blood draw	165
diabetes management	178
doctor visit	764
lab tests	252
preventive care	268
vaccines	79

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	218
Female	190

**Ethnicity**
Non-Hispanic White	382
Black	13
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	203
From 75 to 84	123
85 and over	56
Less than 65	26

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2021

Hypertension	66
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	22
Depression	14
Chronic Kidney Disease	22
Asthma	4
Osteoperosis	5
Atrial Fibrilation	12
Heart Failure	10
Chronic Obstructive Pulmonary Disease	8
Diabetes	27
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2022 were preventive care, lab tests, diabetes management and vaccines.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

aspiration	15
blood draw	108
diabetes management	164
doctor visit	928
injections	15
lab tests	211
preventive care	276
vaccines	112

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	267
Female	288

**Ethnicity**
Non-Hispanic White	523
Black	0
Hispanic	0
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	284
From 75 to 84	171
85 and over	64
Less than 65	36

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	19
Depression	15
Chronic Kidney Disease	19
Asthma	8
Osteoperosis	13
Atrial Fibrilation	18
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	26
Dementia	4
Cancer	11

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2023 were blood draw, preventive care, lab tests and diabetes management.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

blood draw	347
diabetes management	193
doctor visit	1126
lab tests	286
preventive care	338
spinal procedures	12
vaccines	104
X-rays	12

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	250
Female	265

**Ethnicity**
Non-Hispanic White	480
Black	0
Hispanic	0
Asian	0
Other	15
Native American	0

**Age**
From 65 to 74	280
From 75 to 84	149
85 and over	51
Less than 65	35

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	17
Depression	15
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	13
Atrial Fibrilation	16
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	5
Cancer	12

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN during 2024 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

blood draw	396
diabetes management	248
doctor visit	1151
lab tests	437
preventive care	328
vaccines	80

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Male	257
Female	256

**Ethnicity**
Non-Hispanic White	481
Black	0
Hispanic	0
Asian	0
Other	16
Native American	0

**Age**
From 65 to 74	270
From 75 to 84	170
85 and over	47
Less than 65	26

Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD in 2024

Hypertension	72
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	17
Depression	12
Chronic Kidney Disease	19
Asthma	7
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	8
Chronic Obstructive Pulmonary Disease	12
Diabetes	27
Dementia	5
Cancer	14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2014 - 2024

Volume of procedures performed by Dr. Nathaniel Robert Stewart, MD for Medicare patients.

The highest averages for the top procedures that Dr. Nathaniel Robert Stewart, MD treated as an internist in South Bend, IN were preventive care, blood draw, lab tests and diabetes management.

aspiration	15
blood draw	217
cardiac procedures	12
diabetes management	144
doctor visit	703
hospital care	49
injections	15
inpatient care	49
lab tests	211
preventive care	236
spinal procedures	12
vaccines	98
X-rays	12

Average Medicare Patient Data From 2014 - 2024

Information about Medicare patients treated by Dr. Nathaniel Robert Stewart, MD.

**Gender**
Female	182
Male	178

**Ethnicity**
Black / African American	2
Asian / Pacific Islander	0
Non-Hispanic White	338
Hispanic	0
Native American / Alaskan Native	0
Other	4

**Age**
85 and over	39
75 to 84	98
Less than 65	54
65 to 74	168

Average of Total of Conditions of Medicare patients treated by Dr. Nathaniel Robert Stewart, MD From 2014 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Nathaniel Robert Stewart, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	60
High Cholesterol	50
Stroke	2
Ischemic Heart Disease	21
Depression	19
Chronic Kidney Disease	18
Asthma	8
Osteoporosis	6
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	24
Atrial Fibrillation	10
Cancer	7
Dementia	6

Education & Training

Dr. Nathaniel Robert Stewart, MD graduated from Indiana University School of Medicine in 2012. He completed residency at Saint Francis Hospital - Indianapolis. He is certified by the American Board of Family Medicine and has a state license in Indiana.

Medical School: Indiana University School of Medicine (2012)

Residency: Saint Francis Hospital - Indianapolis (2015)

Board Certification: American Board of Family Medicine

Licensed In: Indiana

Affiliations & Hospitals

Dr. Nathaniel Robert Stewart, MD is associated with these hospitals and organizations:

Saint Joseph Health System

Ratings & Reviews

Dr. Nathaniel Robert Stewart, MD has an exceptional overall rating with an average of 4.91 out of 5 stars based on 574 ratings. We collect ratings and reviews of Dr. Nathaniel Robert Stewart, MD from all over the web to help you find the right in South Bend, IN.

4.91

Overall Rating

(574 Ratings)

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General Payments

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

**Payments by Company**
Merck Sharp & Dohme Corporation	$167 ZETIA $117	DULERA $20	NEXPLANON $15	JANUMET XR $10	JANUMET $6
Boehringer Ingelheim Pharmaceuticals, Inc.	$110 Pradaxa $81	Spiriva $17	$12
Abbott Laboratories	$67 FreeStyle Lite system $67
GlaxoSmithKline, LLC.	$23 BREO $23
Novo Nordisk Inc	$16 RYBELSUS $16
Other	$25 Minimed 630G $13	BREZTRI $12

**Types of Payments**
Food and Beverage	$258
Education	$149

Biography

Dr. Nathaniel Stewart is a specialist in family medicine in Martinsville, IN, South Bend, IN, and Granger, IN. His clinical interests include primary care. Dr. Stewart is professionally affiliated with Saint Joseph Health System. He graduated from Indiana University School of Medicine. Patient ratings for Dr. Stewart average 5.0 stars (out of 5). According to Saint Joseph Health System, new patients are welcome to contact his office in Granger, IN.