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Dr. Stefan Loy Zimmerman, MD

(Stefan Zimmerman, MD)

(No ratings)

Specializes in: Radiology (X-Ray and Medical Imaging)

University of Pennsylvania School of Medicine (2004)

1800 Orleans Street
Baltimore, MD 21287

(410) 955-5000

Dr. Stefan Loy Zimmerman, MD is a radiologist in Baltimore, MD specializing in radiology (x-ray and medical imaging). He graduated from University of Pennsylvania School of Medicine in 2004 and has 21 years of experience. Dr. Stefan Loy Zimmerman, MD is affiliated with The Johns Hopkins Hospital and Johns Hopkins University.

Office Locations

1800 Orleans Street
Baltimore, MD 21287

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Noteworthy Medicare Patient Procedures Performed by Dr. Stefan Loy Zimmerman, MD in 2023

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

Top 5%

By Volume:

cardiac MRI

thoracic imaging

In 2023, Dr. Stefan Loy Zimmerman, MD performed more cardiac (heart) MRI, and thoracic (chest) imaging procedures for Medicare patients than 95% of providers in related specialties within Maryland.

Top 25%

By Volume:

abdominal imaging

pelvic imaging

tibia and fibula X-ray

X-rays

By Affordability:

leg X-ray

tibia and fibula X-ray

In 2013, among providers in related specialties within Maryland, Dr. Stefan Loy Zimmerman, MD performed more abdominal imaging, pelvic imaging, tibia and fibula (lower leg) X-ray, and X-rays procedures for Medicare patients than 75% of them and he also had a list price for leg X-ray, and tibia and fibula (lower leg) X-ray 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

2013 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2013 were CT scan, abdominal imaging, pelvic imaging and thoracic (chest) imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	842
cardiac procedures	38
CT scan	1148
MRI (magnetic resonance imaging)	492
musculoskeletal imaging	14
pelvic imaging	702
thoracic (chest) imaging	542

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	781
Female	719

**Ethnicity**
Non-Hispanic White	1041
Black	370
Hispanic	17
Asian	36
Other	36
Native American	0

**Age**
From 65 to 74	733
From 75 to 84	368
85 and over	72
Less than 65	327

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2013

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2013 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	72
High Cholesterol	57
Stroke	8
Ischemic Heart Disease	52
Depression	26
Chronic Kidney Disease	39
Asthma	9
Osteoperosis	8
Atrial Fibrilation	14
Heart Failure	25
Chronic Obstructive Pulmonary Disease	19
Diabetes	36
Dementia	7
Cancer	26

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2014 were CT scan, abdominal imaging, pelvic imaging and thoracic (chest) imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	1007
cardiac procedures	39
CT scan	1519
MRI (magnetic resonance imaging)	522
musculoskeletal imaging	18
pelvic imaging	925
thoracic (chest) imaging	716

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	925
Female	868

**Ethnicity**
Non-Hispanic White	1218
Black	474
Hispanic	0
Asian	44
Other	33
Native American	0

**Age**
From 65 to 74	870
From 75 to 84	436
85 and over	114
Less than 65	373

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2014

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2014 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	71
High Cholesterol	55
Stroke	9
Ischemic Heart Disease	52
Depression	26
Chronic Kidney Disease	40
Asthma	11
Osteoperosis	7
Atrial Fibrilation	15
Heart Failure	24
Chronic Obstructive Pulmonary Disease	19
Diabetes	35
Dementia	7
Cancer	27

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2015 were CT scan, abdominal imaging, pelvic imaging and thoracic (chest) imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	924
cardiac procedures	47
CT scan	1147
MRI (magnetic resonance imaging)	525
pelvic imaging	721
thoracic (chest) imaging	558

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	1588
Female	1434

**Ethnicity**
Non-Hispanic White	2038
Black	732
Hispanic	70
Asian	94
Other	88
Native American	0

**Age**
From 65 to 74	1558
From 75 to 84	672
85 and over	194
Less than 65	598

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2015

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2015 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	72
High Cholesterol	54
Stroke	8
Ischemic Heart Disease	50
Depression	25
Chronic Kidney Disease	39
Asthma	16
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	23
Chronic Obstructive Pulmonary Disease	20
Diabetes	33
Dementia	7
Cancer	25

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2016 were CT scan, abdominal imaging, pelvic imaging and thoracic (chest) imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	916
cardiac procedures	29
CT scan	1216
MRI (magnetic resonance imaging)	429
musculoskeletal imaging	14
pelvic imaging	736
thoracic (chest) imaging	570

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	782
Female	667

**Ethnicity**
Non-Hispanic White	944
Black	384
Hispanic	29
Asian	45
Other	47
Native American	0

**Age**
From 65 to 74	725
From 75 to 84	364
85 and over	89
Less than 65	271

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2016

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2016 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	60
Stroke	7
Ischemic Heart Disease	53
Depression	26
Chronic Kidney Disease	45
Asthma	22
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	28
Chronic Obstructive Pulmonary Disease	19
Diabetes	39
Dementia	10
Cancer	24

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2017 were CT scan, abdominal imaging, pelvic imaging and thoracic (chest) imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	1176
cardiac procedures	22
CT scan	1816
MRI (magnetic resonance imaging)	319
pelvic imaging	1012
thoracic (chest) imaging	842

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	927
Female	832

**Ethnicity**
Non-Hispanic White	1197
Black	432
Hispanic	0
Asian	45
Other	53
Native American	0

**Age**
From 65 to 74	838
From 75 to 84	502
85 and over	115
Less than 65	304

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2017

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2017 were hypertension, ischemic heart disease, high cholesterol and chronic kidney disease.

Hypertension	74
High Cholesterol	52
Stroke	6
Ischemic Heart Disease	53
Depression	27
Chronic Kidney Disease	44
Asthma	11
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	27
Chronic Obstructive Pulmonary Disease	19
Diabetes	36
Dementia	12
Cancer	26

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2018 were CT scan, abdominal imaging, thoracic (chest) imaging and pelvic imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	1059
cardiac procedures	51
CT scan	1990
MRI (magnetic resonance imaging)	261
musculoskeletal imaging	16
pelvic imaging	961
thoracic (chest) imaging	1047

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	923
Female	964

**Ethnicity**
Non-Hispanic White	1206
Black	514
Hispanic	0
Asian	64
Other	58
Native American	0

**Age**
From 65 to 74	892
From 75 to 84	525
85 and over	122
Less than 65	348

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2018

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2018 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	62
Stroke	8
Ischemic Heart Disease	53
Depression	29
Chronic Kidney Disease	49
Asthma	12
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	37
Dementia	11
Cancer	26

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2019 were CT scan, thoracic (chest) imaging, abdominal imaging and pelvic imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	594
cardiac procedures	46
CT scan	1471
MRI (magnetic resonance imaging)	208
pelvic imaging	564
thoracic (chest) imaging	966

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	844
Female	853

**Ethnicity**
Non-Hispanic White	1097
Black	432
Hispanic	0
Asian	52
Other	71
Native American	0

**Age**
From 65 to 74	851
From 75 to 84	449
85 and over	121
Less than 65	276

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2019

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2019 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	74
High Cholesterol	63
Stroke	8
Ischemic Heart Disease	53
Depression	29
Chronic Kidney Disease	44
Asthma	12
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	27
Chronic Obstructive Pulmonary Disease	23
Diabetes	34
Dementia	11
Cancer	26

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2020 were CT scan, thoracic (chest) imaging, abdominal imaging and pelvic imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	618
cardiac procedures	30
CT scan	1551
MRI (magnetic resonance imaging)	118
musculoskeletal imaging	18
pelvic imaging	570
thoracic (chest) imaging	983

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	800
Female	861

**Ethnicity**
Non-Hispanic White	1086
Black	420
Hispanic	0
Asian	47
Other	69
Native American	0

**Age**
From 65 to 74	836
From 75 to 84	457
85 and over	102
Less than 65	266

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2020

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2020 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	73
High Cholesterol	63
Stroke	7
Ischemic Heart Disease	56
Depression	30
Chronic Kidney Disease	46
Asthma	11
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	25
Chronic Obstructive Pulmonary Disease	20
Diabetes	33
Dementia	13
Cancer	25

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2021 were CT scan, thoracic (chest) imaging, abdominal imaging and pelvic imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	644
cardiac procedures	36
CT scan	1503
MRI (magnetic resonance imaging)	151
musculoskeletal imaging	16
pelvic imaging	605
thoracic (chest) imaging	920

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	897
Female	904

**Ethnicity**
Non-Hispanic White	1160
Black	452
Hispanic	36
Asian	72
Other	81
Native American	0

**Age**
From 65 to 74	905
From 75 to 84	501
85 and over	104
Less than 65	291

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2021

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2021 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	73
High Cholesterol	63
Stroke	8
Ischemic Heart Disease	57
Depression	28
Chronic Kidney Disease	45
Asthma	12
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	25
Chronic Obstructive Pulmonary Disease	19
Diabetes	33
Dementia	14
Cancer	23

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2022 were CT scan, thoracic (chest) imaging, abdominal imaging and pelvic imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	418
cardiac procedures	115
CT scan	909
MRI (magnetic resonance imaging)	239
pelvic imaging	386
thoracic (chest) imaging	569
X-rays	13

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	872
Female	902

**Ethnicity**
Non-Hispanic White	1213
Black	385
Hispanic	0
Asian	57
Other	77
Native American	0

**Age**
From 65 to 74	850
From 75 to 84	520
85 and over	131
Less than 65	273

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2022

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2022 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	42
Depression	28
Chronic Kidney Disease	31
Asthma	14
Osteoperosis	14
Atrial Fibrilation	24
Heart Failure	27
Chronic Obstructive Pulmonary Disease	25
Diabetes	35
Dementia	10
Cancer	26

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD during 2023 were CT scan, abdominal imaging, thoracic (chest) imaging and pelvic imaging.

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

abdominal imaging	366
cardiac procedures	63
CT scan	601
MRI (magnetic resonance imaging)	238
musculoskeletal imaging	47
pelvic imaging	326
thoracic (chest) imaging	337
X-rays	101

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	817
Female	867

**Ethnicity**
Non-Hispanic White	1167
Black	373
Hispanic	0
Asian	48
Other	61
Native American	0

**Age**
From 65 to 74	781
From 75 to 84	529
85 and over	137
Less than 65	237

Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD in 2023

The most common conditions of Medicare patients that Dr. Stefan Loy Zimmerman, MD treated during 2023 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	75
High Cholesterol	75
Stroke	21
Ischemic Heart Disease	45
Depression	33
Chronic Kidney Disease	35
Asthma	13
Osteoperosis	15
Atrial Fibrilation	30
Heart Failure	34
Chronic Obstructive Pulmonary Disease	29
Diabetes	39
Dementia	15
Cancer	27

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Stefan Loy Zimmerman, MD for Medicare patients.

The highest averages for the top procedures that Dr. Stefan Loy Zimmerman, MD treated as a radiologist in Baltimore, MD were CT scan, abdominal imaging, thoracic (chest) imaging and pelvic imaging.

abdominal imaging	778
cardiac procedures	46
CT scan	1351
MRI (magnetic resonance imaging)	318
musculoskeletal imaging	20
pelvic imaging	682
thoracic (chest) imaging	731
X-rays	57

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Stefan Loy Zimmerman, MD.

**Gender**
Male	923
Female	897

**Ethnicity**
Black / African American	451
Asian / Pacific Islander	54
Non-Hispanic White	1215
Native American / Alaskan Native	0
Hispanic	13
Other	61

**Age**
75 to 84	483
85 and over	118
Less than 65	324
65 to 74	894

Average of Total of Conditions of Medicare patients treated by Dr. Stefan Loy Zimmerman, MD From 2013 - 2023

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

Hypertension	73
High Cholesterol	61
Stroke	9
Ischemic Heart Disease	51
Depression	27
Chronic Kidney Disease	41
Asthma	13
Osteoporosis	10
Heart Failure	26
Chronic Obstructive Pulmonary Disease	21
Diabetes	35
Atrial Fibrillation	16
Cancer	25
Dementia	10

Education & Training

Dr. Stefan Loy Zimmerman, MD graduated from University of Pennsylvania School of Medicine in 2004. He has a state license in Maryland.

Medical School: University of Pennsylvania School of Medicine (2004)

Licensed In: Maryland

Affiliations & Hospitals

Dr. Stefan Loy Zimmerman, MD is associated with these hospitals and organizations:

The Johns Hopkins Hospital

Johns Hopkins University

Ratings & Reviews

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General Payments

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

**Payments by Company**
HeartFlow, Inc.	$218 FFRct $218
Siemens Medical Solutions USA, Inc.	$45 $45

**Types of Payments**
Food and Beverage	$264

Research Payments

Dr. Stefan Loy Zimmerman, MD has received 4 research payments totaling $13,920.

Biography

Dr. Stefan Zimmerman's areas of specialization are general practice and radiation oncology; he sees patients in Baltimore, MD. He is a graduate of the University of Pennsylvania School of Medicine. He is affiliated with Johns Hopkins University. Yext reports that Dr. Zimmerman is closed to new patients at this time.