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Dr. Christopher J. Ronkar, MD

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Specializes in: Adult Rheumatology

University of Nebraska College of Medicine

Professional interests include: rheumatic diseases

1111 6th Avenue
Des Moines, IA 50314

(515) 247-3121

Dr. Christopher J. Ronkar, MD is a rheumatologist in Des Moines, IA specializing in adult rheumatology. He graduated from University of Nebraska College of Medicine. Dr. Christopher J. Ronkar, MD is affiliated with UnityPoint Health and MercyOne.

Office Locations

1111 6th Avenue
Des Moines, IA 50314

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UnityPoint Health

8421 Plum Drive
Urbandale, IA 50322

(515) 270-7222

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Noteworthy Medicare Patient Procedures Performed by Dr. Christopher J. Ronkar, MD in 2023

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

Top 5%

By Volume:

total calcium test

By Affordability:

alkaline phosphatase test

anti-DNA antibody test

anti-double-stranded DNA antibody test

antinuclear antibody test

blood draw

blood draw for lab tests

calcium blood test

calcium test

complement tests

C-reactive protein testing

extractable nuclear antibody test

intravenous infusion therapy

intravenous infusion

phlebotomy for lab tests

phosphorus blood test

In 2023, among providers in related specialties within Iowa, Dr. Christopher J. Ronkar, MD performed more total calcium test procedures for Medicare patients than 95% of them and he also had a list price for alkaline phosphatase (ALP) test, anti-DNA antibody test, anti-double-stranded DNA (anti-dsDNA) antibody test, antinuclear antibody (ANA) test, blood draw, blood draw for lab tests, calcium blood test, calcium test, complement tests, C-reactive protein testing, extractable nuclear antibody (ENA) test, intravenous infusion therapy, intravenous (IV) infusion, phlebotomy for lab tests, phosphorus blood test, phosphorus test, TB blood test, total calcium test, tuberculosis (TB) testing, uric acid blood test, uric acid test, venipuncture (phlebotomy), and vitamin D test 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 25%

By Volume:

biological response modifier therapy

blood draw

central DEXA

creatinine blood test

intravenous infusion therapy

intravenous chemotherapy

phlebotomy for lab tests

thyroid blood test

By Affordability:

ALT test

AST test

creatine kinase tests

creatinine blood test

creatinine test

kidney function tests

liver function tests

magnesium test

sed rate

total creatine kinase test

In 2012, among providers in related specialties within Iowa, Dr. Christopher J. Ronkar, MD performed more biological response modifier (BRM) therapy, blood draw, central DEXA, creatinine blood test, intravenous infusion therapy, intravenous (IV) chemotherapy, phlebotomy for lab tests, and thyroid blood test procedures for Medicare patients than 75% of them and he also had a list price for ALT (SGPT) test, AST (SGOT) test, creatine kinase tests, creatinine blood test, creatinine test, kidney function tests, liver function tests (LFTs), magnesium test, sed rate (ESR), and total creatine kinase test 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. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2012 were lab tests, blood draw, minimally invasive procedures and chemotherapy.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	94
biological response modifier (BRM) therapy	197
blood draw	660
chemotherapy	197
doctor visit	1105
injections	94
lab tests	3086
minimally invasive procedures	249
musculoskeletal imaging	143
thyroid function tests	21
X-rays	143

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2013 were lab tests, blood draw, minimally invasive procedures and X-rays.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	105
biological response modifier (BRM) therapy	189
blood draw	630
chemotherapy	189
doctor visit	1151
injections	105
lab tests	2946
minimally invasive procedures	231
musculoskeletal imaging	204
spinal procedures	14
thyroid function tests	26
X-rays	218

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	116
Female	459

**Ethnicity**
Non-Hispanic White	552
Black	12
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	262
From 75 to 84	153
85 and over	72
Less than 65	88

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2013

Hypertension	54
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	24
Depression	18
Chronic Kidney Disease	15
Asthma	6
Osteoperosis	38
Atrial Fibrilation	8
Heart Failure	14
Chronic Obstructive Pulmonary Disease	14
Diabetes	20
Dementia	5
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2014 were lab tests, blood draw, minimally invasive procedures and X-rays.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	90
biological response modifier (BRM) therapy	221
blood draw	647
chemotherapy	221
doctor visit	1216
injections	90
lab tests	3087
minimally invasive procedures	253
musculoskeletal imaging	204
spinal procedures	32
thyroid function tests	30
X-rays	236

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	142
Female	531

**Ethnicity**
Non-Hispanic White	646
Black	14
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	310
From 75 to 84	188
85 and over	86
Less than 65	89

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2014

Hypertension	53
High Cholesterol	45
Stroke	2
Ischemic Heart Disease	24
Depression	21
Chronic Kidney Disease	13
Asthma	6
Osteoperosis	36
Atrial Fibrilation	7
Heart Failure	13
Chronic Obstructive Pulmonary Disease	13
Diabetes	20
Dementia	5
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2015 were lab tests, blood draw, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	121
biological response modifier (BRM) therapy	154
blood draw	743
chemotherapy	154
doctor visit	1343
injections	121
lab tests	3706
minimally invasive procedures	246
musculoskeletal imaging	285
spinal procedures	35
thoracic (chest) imaging	11
thyroid function tests	27
X-rays	331

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	268
Female	1094

**Ethnicity**
Non-Hispanic White	1302
Black	36
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	658
From 75 to 84	368
85 and over	192
Less than 65	144

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2015

Hypertension	50
High Cholesterol	46
Stroke	4
Ischemic Heart Disease	22
Depression	20
Chronic Kidney Disease	12
Asthma	9
Osteoperosis	41
Atrial Fibrilation	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	14
Diabetes	17
Dementia	5
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2016 were lab tests, blood draw, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	108
biological response modifier (BRM) therapy	124
blood draw	781
chemotherapy	124
doctor visit	1304
injections	108
lab tests	4106
minimally invasive procedures	226
musculoskeletal imaging	315
spinal procedures	19
thoracic (chest) imaging	12
thyroid function tests	32
X-rays	346

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	146
Female	544

**Ethnicity**
Non-Hispanic White	655
Black	13
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	322
From 75 to 84	199
85 and over	82
Less than 65	87

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2016

Hypertension	53
High Cholesterol	43
Stroke	3
Ischemic Heart Disease	22
Depression	23
Chronic Kidney Disease	15
Asthma	15
Osteoperosis	41
Atrial Fibrilation	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	17
Dementia	6
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2017 were lab tests, blood draw, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	92
biological response modifier (BRM) therapy	118
blood draw	796
chemotherapy	118
doctor visit	1294
injections	92
lab tests	4227
minimally invasive procedures	247
musculoskeletal imaging	277
spinal procedures	14
thoracic (chest) imaging	14
thyroid function tests	32
X-rays	305

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	130
Female	598

**Ethnicity**
Non-Hispanic White	694
Black	12
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	365
From 75 to 84	213
85 and over	78
Less than 65	72

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2017

Hypertension	57
High Cholesterol	45
Stroke	3
Ischemic Heart Disease	23
Depression	25
Chronic Kidney Disease	16
Asthma	6
Osteoperosis	42
Atrial Fibrilation	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	13
Diabetes	17
Dementia	6
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2018 were lab tests, blood draw, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	87
biological response modifier (BRM) therapy	131
blood draw	758
chemotherapy	131
doctor visit	1250
injections	87
lab tests	3838
minimally invasive procedures	294
musculoskeletal imaging	361
spinal procedures	16
thyroid function tests	18
tuberculosis (TB) testing	18
X-rays	377

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	144
Female	617

**Ethnicity**
Non-Hispanic White	724
Black	15
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	372
From 75 to 84	239
85 and over	70
Less than 65	80

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2018

Hypertension	53
High Cholesterol	49
Stroke	2
Ischemic Heart Disease	21
Depression	27
Chronic Kidney Disease	20
Asthma	6
Osteoperosis	42
Atrial Fibrilation	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	20
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2019 were lab tests, blood draw, X-rays and minimally invasive procedures.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	94
biological response modifier (BRM) therapy	158
blood draw	847
chemotherapy	158
doctor visit	1314
injections	94
lab tests	4075
minimally invasive procedures	336
musculoskeletal imaging	327
spinal procedures	14
thyroid function tests	28
X-rays	341

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	155
Female	642

**Ethnicity**
Non-Hispanic White	762
Black	12
Hispanic	0
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	410
From 75 to 84	243
85 and over	85
Less than 65	59

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2019

Hypertension	56
High Cholesterol	49
Stroke	2
Ischemic Heart Disease	23
Depression	25
Chronic Kidney Disease	20
Asthma	6
Osteoperosis	42
Atrial Fibrilation	7
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	18
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2020 were lab tests, blood draw, X-rays and minimally invasive procedures.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	82
biological response modifier (BRM) therapy	143
blood draw	809
chemotherapy	143
doctor visit	1218
injections	82
lab tests	3900
minimally invasive procedures	305
musculoskeletal imaging	298
spinal procedures	13
thyroid function tests	22
X-rays	311

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	137
Female	628

**Ethnicity**
Non-Hispanic White	727
Black	0
Hispanic	0
Asian	0
Other	17
Native American	0

**Age**
From 65 to 74	415
From 75 to 84	224
85 and over	85
Less than 65	41

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2020

Hypertension	55
High Cholesterol	49
Stroke	2
Ischemic Heart Disease	22
Depression	24
Chronic Kidney Disease	19
Asthma	6
Osteoperosis	41
Atrial Fibrilation	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	18
Dementia	6
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2021 were lab tests, blood draw, minimally invasive procedures and X-rays.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	76
biological response modifier (BRM) therapy	164
blood draw	843
chemotherapy	164
doctor visit	1284
injections	76
lab tests	3984
minimally invasive procedures	330
musculoskeletal imaging	264
spinal procedures	11
thyroid function tests	22
tuberculosis (TB) testing	21
X-rays	275

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	137
Female	602

**Ethnicity**
Non-Hispanic White	705
Black	0
Hispanic	0
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	379
From 75 to 84	254
85 and over	80
Less than 65	26

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2021

Hypertension	52
High Cholesterol	50
Stroke	3
Ischemic Heart Disease	20
Depression	22
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	48
Atrial Fibrilation	7
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	16
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA during 2022 were lab tests, blood draw, minimally invasive procedures and X-rays.

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

aspiration	68
biological response modifier (BRM) therapy	162
blood draw	880
chemotherapy	162
doctor visit	1234
injections	68
lab tests	4153
minimally invasive procedures	333
musculoskeletal imaging	330
thyroid function tests	19
tuberculosis (TB) testing	23
X-rays	330

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	134
Female	671

**Ethnicity**
Non-Hispanic White	767
Black	0
Hispanic	0
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	416
From 75 to 84	282
85 and over	80
Less than 65	27

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2022

Hypertension	60
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	16
Depression	24
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	57
Atrial Fibrilation	11
Heart Failure	9
Chronic Obstructive Pulmonary Disease	13
Diabetes	18
Dementia	3
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Christopher J. Ronkar, MD for Medicare patients.

The highest averages for the top procedures that Dr. Christopher J. Ronkar, MD treated as a rheumatologist in Des Moines, IA were lab tests, blood draw, X-rays and minimally invasive procedures.

aspiration	92
biological response modifier (BRM) therapy	160
blood draw	763
chemotherapy	160
doctor visit	1246
injections	92
lab tests	3737
minimally invasive procedures	277
musculoskeletal imaging	273
spinal procedures	18
thoracic (chest) imaging	12
thyroid function tests	25
tuberculosis (TB) testing	20
X-rays	292

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Christopher J. Ronkar, MD.

**Gender**
Male	137
Female	580

**Ethnicity**
Black / African American	10
Asian / Pacific Islander	0
Non-Hispanic White	684
Native American / Alaskan Native	0
Hispanic	0
Other	5

**Age**
75 to 84	214
85 and over	82
Less than 65	64
65 to 74	355

Average of Total of Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Christopher J. Ronkar, MD treated were hypertension, high cholesterol, osteoperosis and depression.

Hypertension	49
High Cholesterol	44
Stroke	2
Ischemic Heart Disease	19
Depression	20
Chronic Kidney Disease	15
Asthma	6
Osteoporosis	38
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	16
Atrial Fibrillation	7
Dementia	5
Cancer	8

Education & Training

Dr. Christopher J. Ronkar, MD graduated from University of Nebraska College of Medicine. He completed residency at University of Iowa Affiliated Hospitals. He is certified by the Rheumatology American Board of Internal Medicine and has a state license in Iowa.

Medical School: University of Nebraska College of Medicine

Residency: University of Iowa Affiliated Hospitals

Board Certification: Rheumatology American Board of Internal Medicine

Licensed In: Iowa

Affiliations & Hospitals

Dr. Christopher J. Ronkar, MD is associated with these hospitals and organizations:

UnityPoint Health

MercyOne

Ratings & Reviews

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General Payments

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

**Payments by Company**
Amgen Inc.	$4,895 EVENITY $4,734	$161
Celgene Corporation	$254 Otezla $254
Radius Health, Inc.	$225 Tymlos $225
AstraZeneca Pharmaceuticals LP	$186 SAPHNELO $186
Boehringer Ingelheim Pharmaceuticals, Inc.	$106 OFEV $106
Other	$252 TALTZ $65	Actemra $45	BENLYSTA $19	COSENTYX $14	$110

**Types of Payments**
Consulting Fee	$4,640
Food and Beverage	$1,135
Education	$144

Biography

Dr. Christopher Ronkar's specialty is adult rheumatology. Dr. Ronkar studied medicine at the University of Nebraska College of Medicine. For his professional training, Dr. Ronkar completed a residency program at a hospital affiliated with the University of Iowa. Clinical interests for Dr. Ronkar include rheumatic diseases. Dr. Ronkar is affiliated with UnityPoint Health and MercyOne. He has an open panel in Des Moines, IA according to MercyOne.

Select Year:

Dr. Christopher J. Ronkar, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Christopher J. Ronkar, MD in 2023

By Volume:

By Affordability:

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. Christopher J. Ronkar, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Christopher J. Ronkar, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

Other Providers in Des Moines, IA