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Dr. James A. Stim, MD

(Dr. James Stim, MD)

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Specializes in: Adult Nephrology

University of Chicago, Pritzker School of Medicine

1401 E State Street
Rockford, IL 61104

(779) 696-4400

Dr. James A. Stim, MD is a nephrologist in Rockford, IL specializing in adult nephrology. He graduated from University of Chicago, Pritzker School of Medicine. Dr. James A. Stim, MD is affiliated with Northwestern Medicine, UW Health and RNA OF ROCKFORD, PLLC.

Office Locations

UW Health

1401 E State Street
Rockford, IL 61104

(779) 696-4400

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Northwestern Medicine

612 Roxbury Road
Rockford, IL 61107

(815) 227-8300

1-855-243-0207

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Noteworthy Medicare Patient Procedures Performed by Dr. James A. Stim, MD in 2023

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

Top 5%

By Affordability:

retroperitoneal ultrasound

In 2023, Dr. James A. Stim, MD had a list price for retroperitoneal ultrasound that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Illinois. 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:

inpatient hospital care

By Affordability:

lab tests

urinalysis

urine tests

In 2012, among providers in related specialties within Illinois, Dr. James A. Stim, MD performed more inpatient hospital care (for patient admitted to hospital) procedures for Medicare patients than 75% of them and he also had a list price for lab tests, urinalysis, and urine tests 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. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2012 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	202
doctor visit	658
hospital care	1089
inpatient care	1089
lab tests	120

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2013 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	232
doctor visit	625
hemofiltration	29
hospital care	1080
inpatient care	1080
lab tests	106

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	521
Female	459

**Ethnicity**
Non-Hispanic White	789
Black	120
Hispanic	59
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	343
From 75 to 84	301
85 and over	135
Less than 65	201

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	11
Ischemic Heart Disease	59
Depression	28
Chronic Kidney Disease	75
Asthma	10
Osteoperosis	7
Atrial Fibrilation	22
Heart Failure	53
Chronic Obstructive Pulmonary Disease	27
Diabetes	62
Dementia	13
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2014 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	186
doctor visit	617
hemofiltration	22
hospital care	843
inpatient care	843
lab tests	80

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	486
Female	443

**Ethnicity**
Non-Hispanic White	742
Black	123
Hispanic	49
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	310
From 75 to 84	271
85 and over	132
Less than 65	216

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2014

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	60
Depression	27
Chronic Kidney Disease	75
Asthma	12
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	53
Chronic Obstructive Pulmonary Disease	25
Diabetes	61
Dementia	14
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2015 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

blood draw	12
dialysis	200
doctor visit	673
hospital care	1038
inpatient care	1038
lab tests	82

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	1072
Female	938

**Ethnicity**
Non-Hispanic White	1626
Black	234
Hispanic	104
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	644
From 75 to 84	638
85 and over	266
Less than 65	462

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2015

Hypertension	75
High Cholesterol	68
Stroke	8
Ischemic Heart Disease	59
Depression	26
Chronic Kidney Disease	75
Asthma	19
Osteoperosis	7
Atrial Fibrilation	23
Heart Failure	54
Chronic Obstructive Pulmonary Disease	26
Diabetes	61
Dementia	14
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2016 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	113
doctor visit	660
hospital care	1083
inpatient care	1083
lab tests	90

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	555
Female	549

**Ethnicity**
Non-Hispanic White	889
Black	112
Hispanic	69
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	345
From 75 to 84	347
85 and over	165
Less than 65	247

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2016

Hypertension	75
High Cholesterol	71
Stroke	7
Ischemic Heart Disease	55
Depression	26
Chronic Kidney Disease	75
Asthma	30
Osteoperosis	8
Atrial Fibrilation	22
Heart Failure	51
Chronic Obstructive Pulmonary Disease	28
Diabetes	59
Dementia	13
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2017 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	113
doctor visit	831
hospital care	1010
inpatient care	1010
lab tests	64

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	557
Female	585

**Ethnicity**
Non-Hispanic White	923
Black	132
Hispanic	67
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	353
From 75 to 84	362
85 and over	173
Less than 65	254

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2017

Hypertension	75
High Cholesterol	65
Stroke	8
Ischemic Heart Disease	55
Depression	26
Chronic Kidney Disease	75
Asthma	10
Osteoperosis	8
Atrial Fibrilation	22
Heart Failure	51
Chronic Obstructive Pulmonary Disease	30
Diabetes	58
Dementia	15
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2018 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	97
doctor visit	676
hospital care	999
inpatient care	999
lab tests	37

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	495
Female	544

**Ethnicity**
Non-Hispanic White	821
Black	125
Hispanic	67
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	305
From 75 to 84	349
85 and over	169
Less than 65	216

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2018

Hypertension	75
High Cholesterol	71
Stroke	9
Ischemic Heart Disease	54
Depression	26
Chronic Kidney Disease	75
Asthma	8
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	51
Chronic Obstructive Pulmonary Disease	28
Diabetes	59
Dementia	15
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2019 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	172
doctor visit	455
hospital care	1205
inpatient care	1205

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	481
Female	462

**Ethnicity**
Non-Hispanic White	723
Black	137
Hispanic	57
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	297
From 75 to 84	296
85 and over	125
Less than 65	225

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	61
Depression	31
Chronic Kidney Disease	75
Asthma	9
Osteoperosis	9
Atrial Fibrilation	25
Heart Failure	56
Chronic Obstructive Pulmonary Disease	30
Diabetes	62
Dementia	16
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2020 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	62
doctor visit	487
hospital care	462
inpatient care	462
lab tests	14

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	417
Female	393

**Ethnicity**
Non-Hispanic White	641
Black	86
Hispanic	63
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	265
From 75 to 84	248
85 and over	122
Less than 65	175

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	54
Depression	25
Chronic Kidney Disease	75
Asthma	8
Osteoperosis	6
Atrial Fibrilation	22
Heart Failure	50
Chronic Obstructive Pulmonary Disease	25
Diabetes	59
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2021 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

dialysis	17
doctor visit	765
hospital care	1322
inpatient care	1322

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	498
Female	463

**Ethnicity**
Non-Hispanic White	794
Black	89
Hispanic	57
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	324
From 75 to 84	297
85 and over	189
Less than 65	151

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	57
Depression	28
Chronic Kidney Disease	75
Asthma	6
Osteoperosis	8
Atrial Fibrilation	26
Heart Failure	53
Chronic Obstructive Pulmonary Disease	24
Diabetes	56
Dementia	15
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL during 2022 were hospital care, inpatient care, lab tests and ultrasound (sonogram).

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

abdominal imaging	12
doctor visit	926
hospital care	1286
inpatient care	1286
lab tests	29
ultrasound (sonogram)	12

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	523
Female	493

**Ethnicity**
Non-Hispanic White	864
Black	71
Hispanic	49
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	332
From 75 to 84	368
85 and over	194
Less than 65	122

Conditions of Medicare patients treated by Dr. James A. Stim, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	44
Depression	25
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	13
Atrial Fibrilation	35
Heart Failure	47
Chronic Obstructive Pulmonary Disease	27
Diabetes	55
Dementia	10
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. James A. Stim, MD for Medicare patients.

The highest averages for the top procedures that Dr. James A. Stim, MD treated as a nephrologist in Rockford, IL were hospital care, inpatient care, dialysis and lab tests.

abdominal imaging	12
blood draw	12
dialysis	139
doctor visit	670
hemofiltration	25
hospital care	1037
inpatient care	1037
lab tests	69
ultrasound (sonogram)	12

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. James A. Stim, MD.

**Gender**
Male	509
Female	484

**Ethnicity**
Black / African American	111
Asian / Pacific Islander	2
Non-Hispanic White	801
Hispanic	58
Native American / Alaskan Native	0
Other	1

**Age**
75 to 84	316
85 and over	151
Less than 65	206
65 to 74	319

Average of Total of Conditions of Medicare patients treated by Dr. James A. Stim, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. James A. Stim, MD treated were chronic kidney disease, hypertension, high cholesterol and diabetes.

Hypertension	68
High Cholesterol	64
Stroke	8
Ischemic Heart Disease	50
Depression	24
Chronic Kidney Disease	68
Asthma	11
Osteoporosis	7
Heart Failure	47
Chronic Obstructive Pulmonary Disease	24
Diabetes	53
Atrial Fibrillation	22
Cancer	9
Dementia	12

Education & Training

Dr. James A. Stim, MD graduated from University of Chicago, Pritzker School of Medicine. He completed residency at University of Illinois at Chicago Affiliated Hospitals. He is certified by the American Board of Internal Medicine - Nephrology (Certified) and has a state license in Illinois.

Medical School: University of Chicago, Pritzker School of Medicine

Residency: University of Illinois at Chicago Affiliated Hospitals (1990)

Board Certification: American Board of Internal Medicine - Nephrology (Certified)

Licensed In: Illinois

Affiliations & Hospitals

Dr. James A. Stim, MD is associated with these hospitals and organizations:

Northwestern Medicine

UW Health

RNA OF ROCKFORD, PLLC

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General Payments

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

**Payments by Company**
OPKO Pharmaceuticals, LLC	$101 Rayaldee $101
Astute Medical, Inc.	$91 Nephrocheck $91
Amgen Inc.	$82 Parsabiv $82
Baxter Healthcare	$72 Renal - PD $72
Fresenius USA Marketing, Inc.	$10 Velphoro $10

**Types of Payments**
Food and Beverage	$357

Biography

Dr. James Stim practices adult nephrology. Before completing his residency at a hospital affiliated with the University of Illinois at Chicago, Dr. Stim attended medical school at the University of Chicago, Pritzker School of Medicine and the University of Illinois College of Medicine at Chicago. His hospital/clinic affiliations include Northwestern Medicine and UW Health.