Procedure Volume Patient Data Patient Conditions Reviews General Payments Back to Top

Home > IA Providers > Anesthesiologists

Dr. Karl Elliott Terwilliger, MD

(No ratings)

Specializes in: Anesthesiology

Rosalind Franklin University of Medicine and Science, Chicago Medical School (1992)

1825 Logan Avenue
Waterloo, IA 50703

(319) 235-3886

Dr. Karl Elliott Terwilliger, MD is an anesthesiologist in Waterloo, IA specializing in anesthesiology. He graduated from Rosalind Franklin University of Medicine and Science, Chicago Medical School in 1992 and has 34 years of experience. Dr. Karl Elliott Terwilliger, MD is affiliated with IOWA PHYSICIANS CLINIC MEDICAL FOUNDATION.

Office Locations

1825 Logan Avenue
Waterloo, IA 50703

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Karl Elliott Terwilliger, MD in 2024

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

Top 5%

By Affordability:

cardiac imaging

cardiac procedures

echocardiogram

minimally invasive procedures

transesophageal echocardiography

ultrasound

In 2024, Dr. Karl Elliott Terwilliger, MD had a list price for cardiac imaging, cardiac procedures, echocardiogram (echo), minimally invasive procedures, transesophageal echocardiography (TEE), and ultrasound (sonogram) that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Iowa. 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:

centrally inserted non-tunneled central line placement

In 2024, Dr. Karl Elliott Terwilliger, MD performed more centrally inserted non-tunneled central line placement procedures for Medicare patients than 90% of providers in related specialties within Iowa.

Top 25%

By Volume:

transesophageal echocardiography

By Affordability:

catheterization

In 2012, among providers in related specialties within Iowa, Dr. Karl Elliott Terwilliger, MD performed more transesophageal echocardiography (TEE) procedures for Medicare patients than 75% of them and he also had a list price for catheterization 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. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2012 were catheterization.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	23

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2013 were catheterization.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	14

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	129
Female	139

**Ethnicity**
Non-Hispanic White	257
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	114
From 75 to 84	87
85 and over	34
Less than 65	33

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2013

Hypertension	75
High Cholesterol	71
Stroke	6
Ischemic Heart Disease	47
Depression	29
Chronic Kidney Disease	27
Asthma	11
Osteoperosis	9
Atrial Fibrilation	18
Heart Failure	26
Chronic Obstructive Pulmonary Disease	23
Diabetes	34
Dementia	11
Cancer	18

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2014 were catheterization.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	28

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	128
Female	158

**Ethnicity**
Non-Hispanic White	265
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	122
From 75 to 84	97
85 and over	36
Less than 65	31

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2014

Hypertension	75
High Cholesterol	65
Stroke	5
Ischemic Heart Disease	49
Depression	23
Chronic Kidney Disease	30
Asthma	5
Osteoperosis	14
Atrial Fibrilation	24
Heart Failure	31
Chronic Obstructive Pulmonary Disease	22
Diabetes	37
Dementia	14
Cancer	15

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2015 were catheterization, hospital care and inpatient care.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	21
hospital care	18
inpatient care	18

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	240
Female	282

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

**Age**
From 65 to 74	238
From 75 to 84	154
85 and over	50
Less than 65	80

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2015

Hypertension	75
High Cholesterol	69
Stroke	5
Ischemic Heart Disease	48
Depression	40
Chronic Kidney Disease	43
Asthma	17
Osteoperosis	13
Atrial Fibrilation	22
Heart Failure	31
Chronic Obstructive Pulmonary Disease	30
Diabetes	39
Dementia	14
Cancer	17

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2016 were hospital care and inpatient care.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

hospital care	14
inpatient care	14

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	95
Female	106

**Ethnicity**
Non-Hispanic White	179
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	78
From 75 to 84	47
85 and over	30
Less than 65	46

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2016

Hypertension	75
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	40
Depression	33
Chronic Kidney Disease	43
Asthma	32
Osteoperosis	12
Atrial Fibrilation	19
Heart Failure	26
Chronic Obstructive Pulmonary Disease	23
Diabetes	24
Dementia	12
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2017 were catheterization.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	12

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	98
Female	96

**Ethnicity**
Non-Hispanic White	175
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	98
From 75 to 84	47
85 and over	20
Less than 65	29

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2017

Hypertension	75
High Cholesterol	68
Stroke	0
Ischemic Heart Disease	47
Depression	38
Chronic Kidney Disease	43
Asthma	10
Osteoperosis	12
Atrial Fibrilation	20
Heart Failure	30
Chronic Obstructive Pulmonary Disease	23
Diabetes	36
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2018 were catheterization, nerve block and injections.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	17
injections	11
nerve block	11

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	125
Female	105

**Ethnicity**
Non-Hispanic White	208
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	60
85 and over	21
Less than 65	39

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2018

Hypertension	75
High Cholesterol	74
Stroke	7
Ischemic Heart Disease	52
Depression	35
Chronic Kidney Disease	50
Asthma	8
Osteoperosis	9
Atrial Fibrilation	17
Heart Failure	33
Chronic Obstructive Pulmonary Disease	23
Diabetes	40
Dementia	9
Cancer	20

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2019 were catheterization, hospital care and inpatient care.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	22
hospital care	21
inpatient care	21

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	114
Female	107

**Age**
From 65 to 74	107
From 75 to 84	65
85 and over	22
Less than 65	27

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	53
Depression	34
Chronic Kidney Disease	46
Asthma	7
Osteoperosis	13
Atrial Fibrilation	22
Heart Failure	37
Chronic Obstructive Pulmonary Disease	27
Diabetes	41
Dementia	11
Cancer	18

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2020 were catheterization, hospital care and inpatient care.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	35
hospital care	16
inpatient care	16

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	100
Female	79

**Ethnicity**
Non-Hispanic White	168
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	53
85 and over	22
Less than 65	27

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	51
Depression	36
Chronic Kidney Disease	47
Asthma	8
Osteoperosis	10
Atrial Fibrilation	18
Heart Failure	34
Chronic Obstructive Pulmonary Disease	26
Diabetes	41
Dementia	13
Cancer	20

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2021 were catheterization.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

catheterization	43

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	104
Female	106

**Ethnicity**
Non-Hispanic White	199
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	101
From 75 to 84	65
85 and over	27
Less than 65	17

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	52
Depression	33
Chronic Kidney Disease	50
Asthma	10
Osteoperosis	10
Atrial Fibrilation	27
Heart Failure	32
Chronic Obstructive Pulmonary Disease	25
Diabetes	29
Dementia	12
Cancer	20

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2022 were catheterization, ultrasound (sonogram), minimally invasive procedures and cardiac procedures.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

cardiac procedures	30
catheterization	36
minimally invasive procedures	30
ultrasound (sonogram)	30

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	83
Female	83

**Age**
From 65 to 74	68
From 75 to 84	68
85 and over	13
Less than 65	17

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	52
Depression	27
Chronic Kidney Disease	40
Asthma	8
Osteoperosis	13
Atrial Fibrilation	34
Heart Failure	36
Chronic Obstructive Pulmonary Disease	22
Diabetes	39
Dementia	0
Cancer	22

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2023 were catheterization, ultrasound (sonogram), minimally invasive procedures and cardiac procedures.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

cardiac procedures	14
catheterization	29
minimally invasive procedures	14
ultrasound (sonogram)	14

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	41
Female	36

**Age**
From 65 to 74	36
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	61
Depression	26
Chronic Kidney Disease	31
Asthma	0
Osteoperosis	0
Atrial Fibrilation	30
Heart Failure	31
Chronic Obstructive Pulmonary Disease	26
Diabetes	30
Dementia	0
Cancer	23

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA during 2024 were catheterization, ultrasound (sonogram), minimally invasive procedures and cardiac procedures.

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

cardiac procedures	22
catheterization	32
minimally invasive procedures	22
ultrasound (sonogram)	22

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Male	54
Female	38

**Age**
From 65 to 74	49
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	59
Depression	28
Chronic Kidney Disease	37
Asthma	0
Osteoperosis	0
Atrial Fibrilation	33
Heart Failure	39
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Dementia	0
Cancer	23

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Karl Elliott Terwilliger, MD for Medicare patients.

The highest averages for the top procedures that Dr. Karl Elliott Terwilliger, MD treated as an anesthesiologist in Waterloo, IA were catheterization, ultrasound (sonogram), minimally invasive procedures and cardiac procedures.

cardiac procedures	22
catheterization	26
hospital care	17
injections	11
inpatient care	17
minimally invasive procedures	22
nerve block	11
ultrasound (sonogram)	22

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Karl Elliott Terwilliger, MD.

**Gender**
Female	102
Male	100

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	148
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	21
75 to 84	59
Less than 65	26
65 to 74	92

Average of Total of Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD From 2012 - 2024

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

Hypertension	69
High Cholesterol	66
Stroke	5
Ischemic Heart Disease	47
Depression	29
Chronic Kidney Disease	37
Asthma	8
Osteoporosis	8
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	32
Atrial Fibrillation	21
Dementia	8
Cancer	17

Education & Training

Dr. Karl Elliott Terwilliger, MD graduated from Rosalind Franklin University of Medicine and Science, Chicago Medical School in 1992. He has a state license in Iowa.

Medical School: Rosalind Franklin University of Medicine and Science, Chicago Medical School (1992)

Licensed In: Iowa

Ratings & Reviews

Dr. Karl Elliott Terwilliger, MD does not have any reviews yet, be the first to leave a review of Dr. Karl Elliott Terwilliger, MD here: Leave a Review

(No ratings)

Leave a Review

General Payments

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

**Payments by Company**
MAQUET Cardiovascular U.S. Sales, L.L.C.	$213 CARDIOHELP $213
Getinge USA Sales, LLC	$126 CARDIOHELP $126
KCI USA, Inc	$83 VAC THERAPY $83
Covidien LP	$42 Situate $42
Zimmer Biomet Holdings, Inc.	$22 STERNALOCK BLU SYSTEM $22
Other	$32 CoreValve Evolut $19	HemoSphere $13

**Types of Payments**
Food and Beverage	$518

Biography

Dr. Karl Terwilliger specializes in anesthesiology and practices in Waterloo, IA. Dr. Terwilliger obtained a license to practice in Iowa.

Select Year:

Dr. Karl Elliott Terwilliger, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Karl Elliott Terwilliger, MD in 2024

By Affordability:

By Volume:

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Karl Elliott Terwilliger, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography

Anesthesiologists in Nearby Locations

Other Providers in Waterloo, IA