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Dr. Christopher J. Johnson, MD

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Specializes in: Clinical Pathology

University of Iowa, Carver College of Medicine (2001)

1215 Duff Avenue
Ames, IA 50010

(515) 239-4448

Dr. Christopher J. Johnson, MD is a clinical pathologist in Ames, IA specializing in clinical pathology. He graduated from University of Iowa, Carver College of Medicine in 2001 and has 25 years of experience. Dr. Christopher J. Johnson, MD is affiliated with Boone County Hospital, Mary Greeley Medical Center and McFarland Clinic.

Office Locations

1215 Duff Avenue
Ames, IA 50010

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In The News (see more mentions in the news)

“Pathologist Dr Christopher Johnson recorded his cause of death as a 'self inflicted' air gun injury to the head.”—"Crossbow attacker who shot two women killed himself with air gun", Daily Mail Online, May 2025

“Dr Christopher Johnson, a forensic pathologist, carried out the post-mortem 'identified injuries to the back of the trunk and he identified they had revealed 'round' shaped abrasions', Mr Wood said.”—"Woman found dead after being 'beaten with hammer', court hears", Daily Mail Online, February 2025

“Pathologist Dr. Christopher Johnson said after he had inspected the body, he believed Mr. Thirsk's injuries would have been 'consistent' with being crushed by a...”—"Businessman's wife found him 'crushed' by own Range Rover near helipad at their home", New York Post, August 2024

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

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

Top 5%

By Volume:

cytology

gynecologic cytology

human papillomavirus testing

liquid-based Pap test

preventive care

By Affordability:

blood tests

genetic testing

liquid-based cytology

molecular genetic testing

non-gynecologic liquid-based cytology

serum protein electrophoresis

In 2023, among providers in related specialties within Iowa, Dr. Christopher J. Johnson, MD performed more cytology, gynecologic cytology, human papillomavirus (HPV) testing, liquid-based Pap test, and preventive care procedures for Medicare patients than 95% of them and he also had a list price for blood tests, genetic testing, liquid-based cytology (ThinPrep), molecular genetic testing, non-gynecologic liquid-based cytology, and serum protein electrophoresis (SPEP) 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 10%

By Volume:

lab tests

In 2023, Dr. Christopher J. Johnson, MD performed more lab tests procedures for Medicare patients than 90% of providers in related specialties within Iowa.

Top 25%

By Affordability:

consultation

intraoperative pathology consultation

In 2012, Dr. Christopher J. Johnson, MD had a list price for consultation, and intraoperative pathology consultation that was lower than the list prices billed to Medicare by 75% 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.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2012 were lab tests, cytology, consultation and gynecologic pathology.

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

consultation	112
cytology	253
gynecologic pathology	29
lab tests	699

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2013 were lab tests, cytology, consultation and gynecologic pathology.

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

consultation	192
cytology	298
gynecologic pathology	60
lab tests	952

2013 Medicare Patient Data

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

**Gender**
Male	947
Female	1445

**Ethnicity**
Non-Hispanic White	2329
Black	14
Hispanic	15
Asian	0
Other	21
Native American	0

**Age**
From 65 to 74	1113
From 75 to 84	761
85 and over	279
Less than 65	239

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

Hypertension	61
High Cholesterol	60
Stroke	3
Ischemic Heart Disease	27
Depression	18
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	14
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	5
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2014 were lab tests, cytology, consultation and gynecologic pathology.

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

consultation	141
cytology	217
gynecologic pathology	34
lab tests	623

2014 Medicare Patient Data

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

**Gender**
Male	886
Female	1257

**Ethnicity**
Non-Hispanic White	2078
Black	12
Hispanic	0
Asian	13
Other	25
Native American	0

**Age**
From 65 to 74	989
From 75 to 84	708
85 and over	263
Less than 65	183

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

Hypertension	61
High Cholesterol	57
Stroke	3
Ischemic Heart Disease	29
Depression	17
Chronic Kidney Disease	21
Asthma	6
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	6
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2015 were lab tests, cytology, consultation and gynecologic pathology.

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

consultation	104
cytology	231
gynecologic pathology	27
lab tests	556

2015 Medicare Patient Data

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

**Gender**
Male	1766
Female	2516

**Ethnicity**
Non-Hispanic White	4138
Black	28
Hispanic	30
Asian	0
Other	62
Native American	0

**Age**
From 65 to 74	1988
From 75 to 84	1314
85 and over	564
Less than 65	416

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

Hypertension	60
High Cholesterol	55
Stroke	4
Ischemic Heart Disease	27
Depression	18
Chronic Kidney Disease	23
Asthma	11
Osteoperosis	8
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	6
Cancer	17

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2016 were lab tests, cytology, consultation and gynecologic pathology.

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

consultation	97
cytology	222
gynecologic pathology	28
lab tests	818
second opinions	15

2016 Medicare Patient Data

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

**Gender**
Male	1011
Female	1297

**Ethnicity**
Non-Hispanic White	2225
Black	0
Hispanic	16
Asian	17
Other	37
Native American	0

**Age**
From 65 to 74	1070
From 75 to 84	718
85 and over	307
Less than 65	213

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

Hypertension	63
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	28
Depression	17
Chronic Kidney Disease	27
Asthma	16
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	28
Dementia	6
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2017 were lab tests, cytology, consultation and second opinions.

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

consultation	68
cytology	173
lab tests	906
second opinions	14

2017 Medicare Patient Data

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

**Gender**
Male	1025
Female	1272

**Ethnicity**
Non-Hispanic White	2217
Black	0
Hispanic	13
Asian	14
Other	42
Native American	0

**Age**
From 65 to 74	1024
From 75 to 84	768
85 and over	298
Less than 65	207

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

Hypertension	63
High Cholesterol	48
Stroke	3
Ischemic Heart Disease	29
Depression	19
Chronic Kidney Disease	27
Asthma	6
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	7
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2018 were lab tests, cytology, preventive care and gynecologic pathology.

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

consultation	70
cytology	226
gynecologic pathology	85
lab tests	912
preventive care	94

2018 Medicare Patient Data

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

**Gender**
Male	1021
Female	1214

**Ethnicity**
Non-Hispanic White	2148
Black	0
Hispanic	16
Asian	13
Other	47
Native American	0

**Age**
From 65 to 74	1041
From 75 to 84	705
85 and over	301
Less than 65	188

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

Hypertension	61
High Cholesterol	57
Stroke	3
Ischemic Heart Disease	30
Depression	21
Chronic Kidney Disease	28
Asthma	6
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	26
Dementia	7
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2019 were lab tests, cytology, preventive care and gynecologic pathology.

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

consultation	61
cytology	227
gynecologic pathology	105
lab tests	861
preventive care	106

2019 Medicare Patient Data

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

**Gender**
Male	987
Female	1151

**Ethnicity**
Non-Hispanic White	2050
Black	0
Hispanic	13
Asian	0
Other	54
Native American	0

**Age**
From 65 to 74	1058
From 75 to 84	678
85 and over	269
Less than 65	133

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

Hypertension	62
High Cholesterol	58
Stroke	3
Ischemic Heart Disease	29
Depression	20
Chronic Kidney Disease	30
Asthma	5
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	6
Cancer	17

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2020 were lab tests, cytology, preventive care and gynecologic pathology.

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

consultation	68
cytology	227
gynecologic pathology	109
lab tests	787
preventive care	120
second opinions	18

2020 Medicare Patient Data

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

**Gender**
Male	829
Female	959

**Ethnicity**
Non-Hispanic White	1699
Black	0
Hispanic	0
Asian	16
Other	52
Native American	0

**Age**
From 65 to 74	887
From 75 to 84	556
85 and over	240
Less than 65	105

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

Hypertension	63
High Cholesterol	58
Stroke	2
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	31
Asthma	5
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	26
Dementia	6
Cancer	17

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2021 were lab tests, cytology, preventive care and gynecologic pathology.

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

consultation	76
cytology	251
gynecologic pathology	139
lab tests	913
preventive care	210
second opinions	13

2021 Medicare Patient Data

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

**Gender**
Male	882
Female	1135

**Ethnicity**
Non-Hispanic White	1926
Black	0
Hispanic	16
Asian	14
Other	47
Native American	0

**Age**
From 65 to 74	967
From 75 to 84	624
85 and over	300
Less than 65	126

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

Hypertension	63
High Cholesterol	61
Stroke	3
Ischemic Heart Disease	27
Depression	20
Chronic Kidney Disease	31
Asthma	5
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	24
Dementia	6
Cancer	17

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA during 2022 were lab tests, cytology, preventive care and gynecologic pathology.

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

consultation	73
cytology	252
gynecologic pathology	159
lab tests	984
preventive care	248

2022 Medicare Patient Data

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

**Gender**
Male	946
Female	1136

**Ethnicity**
Non-Hispanic White	1986
Black	0
Hispanic	17
Asian	0
Other	61
Native American	0

**Age**
From 65 to 74	1000
From 75 to 84	678
85 and over	265
Less than 65	139

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

Hypertension	70
High Cholesterol	74
Stroke	6
Ischemic Heart Disease	21
Depression	19
Chronic Kidney Disease	22
Asthma	10
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	26
Dementia	4
Cancer	21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

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

The highest averages for the top procedures that Dr. Christopher J. Johnson, MD treated as a clinical pathologist in Ames, IA were lab tests, cytology, preventive care and consultation.

consultation	96
cytology	234
gynecologic pathology	77
lab tests	819
preventive care	155
second opinions	15

Average Medicare Patient Data From 2012 - 2022

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

**Gender**
Male	936
Female	1216

**Ethnicity**
Black / African American	4
Asian / Pacific Islander	7
Non-Hispanic White	2072
Hispanic	12
Native American / Alaskan Native	0
Other	40

**Age**
75 to 84	682
85 and over	280
Less than 65	177
65 to 74	1012

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

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

Hypertension	57
High Cholesterol	52
Stroke	3
Ischemic Heart Disease	25
Depression	17
Chronic Kidney Disease	23
Asthma	7
Osteoporosis	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	23
Atrial Fibrillation	12
Cancer	15
Dementia	5

Education & Training

Dr. Christopher J. Johnson, MD graduated from University of Iowa, Carver College of Medicine in 2001. He completed residency at University of Iowa Hospitals & Clinics. He is certified by the American Board of Pathology and has a state license in Iowa.

Medical School: University of Iowa, Carver College of Medicine (2001)

Residency: University of Iowa Hospitals & Clinics

Board Certification: American Board of Pathology

Licensed In: Iowa

Affiliations & Hospitals

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

Boone County Hospital

Mary Greeley Medical Center

McFarland Clinic

Ratings & Reviews

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General Payments

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

**Payments by Company**
Covidien LP	$13 Situate $13
Torax Medical, Inc.	$13 LINX $13

**Types of Payments**
Food and Beverage	$26

Biography

Dr. Christopher Johnson practices clinical pathology. Dr. Johnson is affiliated with McFarland Clinic, Mary Greeley Medical Center, and Boone County Hospital. Before performing his residency at the University of Iowa Hospitals & Clinics, Dr. Johnson attended the University of Iowa, Carver College of Medicine for medical school.

Select Year:

Dr. Christopher J. Johnson, MD

Office Locations

In The News (see more mentions in the news)

Noteworthy Medicare Patient Procedures Performed by Dr. Christopher J. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, 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. Johnson, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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