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Dr. John Karwowski, MD

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Specializes in: Vascular Surgery

Tufts University School of Medicine (1995)

419 West Redwood Street Suite 240
Baltimore, MD 21201

(667) 214-1592

Dr. John Karwowski, MD is a vascular surgeon in Baltimore, MD specializing in vascular surgery. He graduated from Tufts University School of Medicine in 1995 and has 31 years of experience. Dr. John Karwowski, MD is affiliated with University of Maryland Medical System and U.S. Department of Veterans Affairs.

Office Locations

10 North Greene Street Maryland Vahcs (512), Baltimore
Baltimore, MD 21201

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University of Maryland Medical System

116 Defense Highway Suite 100
Annapolis, MD 21401

(410) 571-5545

(410) 571-5334

open_in_new

University of Maryland Medical System

419 West Redwood Street Suite 240
Baltimore, MD 21201

(667) 214-1592

(410) 328-0409

open_in_new

In The News

“Rogers, a 12-year NFL veteran who was signed by the Giants in April, was seen in New York by the Giants doctor, Russell Warren, and vascular surgeon John Karwowski, the team said in a news release.”—"Giants tackle Rogers to miss NFL season with blood clot in calf", The Morning Call, August 2012

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

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

Top 25%

By Volume:

inpatient hospital care

In 2012, Dr. John Karwowski, MD performed more inpatient hospital care (for patient admitted to hospital) procedures for Medicare patients than 75% of providers in related specialties within Maryland.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2012 were vascular procedures, ultrasound (sonogram), pelvic imaging and abdominal imaging.

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

abdominal imaging	107
arthrodesis (bone fusion surgery)	15
doctor visit	558
endarterectomy	11
minimally invasive procedures	15
neck surgery	11
pelvic imaging	107
spinal procedures	15
ultrasound (sonogram)	567
vascular procedures	863

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2013 were vascular procedures, ultrasound (sonogram), pelvic imaging and abdominal imaging.

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

abdominal imaging	14
doctor visit	75
pelvic imaging	14
ultrasound (sonogram)	80
vascular procedures	121

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	86
Female	52

**Ethnicity**
Non-Hispanic White	108
Black	15
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	44
From 75 to 84	60
85 and over	19
Less than 65	15

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

Hypertension	75
High Cholesterol	67
Stroke	8
Ischemic Heart Disease	69
Depression	17
Chronic Kidney Disease	40
Asthma	0
Osteoperosis	12
Atrial Fibrilation	20
Heart Failure	37
Chronic Obstructive Pulmonary Disease	14
Diabetes	42
Dementia	12
Cancer	20

Medicare Procedure and Patient Information

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	51
Female	32

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

**Age**
From 65 to 74	29
From 75 to 84	0
85 and over	0
Less than 65	27

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

Hypertension	75
High Cholesterol	75
Stroke	17
Ischemic Heart Disease	75
Depression	41
Chronic Kidney Disease	72
Asthma	13
Osteoperosis	0
Atrial Fibrilation	19
Heart Failure	61
Chronic Obstructive Pulmonary Disease	41
Diabetes	60
Dementia	23
Cancer	16

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2018 were hospital care, inpatient care and vascular procedures.

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

doctor visit	121
hospital care	193
inpatient care	193
vascular procedures	13

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	152
Female	111

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

**Age**
From 65 to 74	98
From 75 to 84	0
85 and over	0
Less than 65	88

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

Hypertension	75
High Cholesterol	74
Stroke	21
Ischemic Heart Disease	71
Depression	35
Chronic Kidney Disease	75
Asthma	15
Osteoperosis	7
Atrial Fibrilation	24
Heart Failure	52
Chronic Obstructive Pulmonary Disease	33
Diabetes	56
Dementia	27
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2019 were hospital care, inpatient care and vascular procedures.

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

doctor visit	107
hospital care	198
inpatient care	198
vascular procedures	37

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	148
Female	127

**Ethnicity**
Non-Hispanic White	131
Black	124
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	106
From 75 to 84	71
85 and over	15
Less than 65	83

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

Hypertension	75
High Cholesterol	73
Stroke	19
Ischemic Heart Disease	70
Depression	39
Chronic Kidney Disease	75
Asthma	9
Osteoperosis	9
Atrial Fibrilation	23
Heart Failure	47
Chronic Obstructive Pulmonary Disease	33
Diabetes	52
Dementia	25
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2020 were hospital care and inpatient care.

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

doctor visit	43
hospital care	100
inpatient care	100

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	74
Female	82

**Ethnicity**
Non-Hispanic White	81
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	67
From 75 to 84	31
85 and over	13
Less than 65	45

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

Hypertension	75
High Cholesterol	69
Stroke	18
Ischemic Heart Disease	71
Depression	34
Chronic Kidney Disease	74
Asthma	10
Osteoperosis	0
Atrial Fibrilation	26
Heart Failure	48
Chronic Obstructive Pulmonary Disease	32
Diabetes	51
Dementia	26
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2021 were hospital care and inpatient care.

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

doctor visit	35
hospital care	79
inpatient care	79

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	51
Female	64

**Ethnicity**
Non-Hispanic White	0
Black	62
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	53
From 75 to 84	0
85 and over	0
Less than 65	29

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

Hypertension	75
High Cholesterol	75
Stroke	19
Ischemic Heart Disease	69
Depression	41
Chronic Kidney Disease	70
Asthma	14
Osteoperosis	0
Atrial Fibrilation	17
Heart Failure	50
Chronic Obstructive Pulmonary Disease	35
Diabetes	49
Dementia	28
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD during 2022 were hospital care, inpatient care and vascular procedures.

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

hospital care	107
inpatient care	107
vascular procedures	12

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	80
Female	74

**Ethnicity**
Non-Hispanic White	0
Black	76
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	36
85 and over	14
Less than 65	52

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

Hypertension	75
High Cholesterol	75
Stroke	27
Ischemic Heart Disease	64
Depression	40
Chronic Kidney Disease	66
Asthma	18
Osteoperosis	10
Atrial Fibrilation	32
Heart Failure	51
Chronic Obstructive Pulmonary Disease	29
Diabetes	59
Dementia	15
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

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

The highest averages for the top procedures that Dr. John Karwowski, MD treated as a vascular surgeon in Baltimore, MD were ultrasound (sonogram), vascular procedures, hospital care and inpatient care.

abdominal imaging	60
arthrodesis (bone fusion surgery)	15
doctor visit	156
endarterectomy	11
hospital care	135
inpatient care	135
minimally invasive procedures	15
neck surgery	11
pelvic imaging	60
spinal procedures	15
ultrasound (sonogram)	323
vascular procedures	209

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Karwowski, MD.

**Gender**
Male	80
Female	67

**Ethnicity**
Black / African American	34
Asian / Pacific Islander	0
Non-Hispanic White	61
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	24
85 and over	7
Less than 65	42
65 to 74	56

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

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

Hypertension	65
High Cholesterol	63
Stroke	16
Ischemic Heart Disease	61
Depression	30
Chronic Kidney Disease	59
Asthma	9
Osteoporosis	4
Heart Failure	43
Chronic Obstructive Pulmonary Disease	27
Diabetes	46
Atrial Fibrillation	20
Dementia	19
Cancer	12

Education & Training

Dr. John Karwowski, MD graduated from Tufts University School of Medicine in 1995. He completed residency at Stanford Hospital & Clinics. He is certified by the American Board of Surgery - Vascular Surgery and has a state license in Maryland.

Medical School: Tufts University School of Medicine (1995)

Residency: Stanford Hospital & Clinics (1997)

Board Certification: American Board of Surgery - Vascular Surgery (2008)

Licensed In: Maryland

Affiliations & Hospitals

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

University of Maryland Medical System

U.S. Department of Veterans Affairs

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General Payments

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

**Payments by Company**
LeMaitre Vascular, Inc.	$2,378 VALVULOTOM $2,378
W. L. Gore & Associates, Inc.	$1,966 TAG Thoracic Endoprosthesis $1,454	C3 Delivery System $262	VIABAHN Endoprosthesis with PROPATEN Bioactive Surface $121	VIABAHN Endoprosthesis with Hep $106	PROPATEN Vascular Graft $23
Endologix, Inc.	$1,556 AFX $1,097	OVATION $448	Pevar $11
Cook Incorporated	$1,266 AI - Advanced Tech $332	AI - AAA $312	PI - Stents $254	Cook Medical AAA $162	PI - Self-Expanding Stent $129	Other $77
Silk Road Medical, Inc.	$1,229 ENROUTE 0.014 Guidewire $1,156	ENROUTE Transcarotid Stent $39	ENROUTE .014 Guidewire $33
Other	$2,126 VNS Therapy $619	Anti-restenotic Therapies DCB $181	PERCLOSE PROGLIDE $125	STELLAREX $123	VNS Therapy SenTiva Model 1000 Generator $120	Other $956

**Types of Payments**
Food and Beverage	$5,912
Travel and Lodging	$4,609

Research Payments

Dr. John Karwowski, MD has received 7 research payments totaling $33,880.

Biography

Dr. John Karwowski is a specialist in vascular surgery. He works in Baltimore, MD and Annapolis, MD. He is a graduate of Tufts University School of Medicine and a graduate of Stanford Hospital & Clinics' residency program. His hospital/clinic affiliations include the University of Maryland Medical System and U.S. Department of Veterans Affairs.