In 2024, Dr. John C. Callahan, M D performed more flu shot, lab tests, and preventive care procedures for Medicare patients than 95% of providers in related specialties within North Carolina.

Top 10%

By Volume:

blood draw

phlebotomy for lab tests

prothrombin time test

By Affordability:

mental health screening

In 2024, among providers in related specialties within North Carolina, Dr. John C. Callahan, M D performed more blood draw, phlebotomy for lab tests, and prothrombin time (PT) test procedures for Medicare patients than 90% of them and he also had a list price for mental health screening that was lower than the list prices billed to Medicare by 90% 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:

A1C test

complete blood count

lipid profile

By Affordability:

In 2012, among providers in related specialties within North Carolina, Dr. John C. Callahan, M D performed more A1C test, complete blood count (CBC), and lipid profile procedures for Medicare patients than 75% of them and he also had a list price for flu shot, flu vaccine, immunization (preventive vaccines), and vaccines 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. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2012 were lab tests, preventive care, blood draw and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	36
blood draw	235
diabetes management	219
doctor visit	1072
injections	36
lab tests	440
preventive care	365
vaccines	168

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2013 were lab tests, preventive care, blood draw and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	45
blood draw	233
diabetes management	206
doctor visit	1161
injections	45
lab tests	420
preventive care	337
vaccines	152

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	152
Female	181

**Ethnicity**
Non-Hispanic White	190
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	148
From 75 to 84	61
85 and over	23
Less than 65	101

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2013

Hypertension	75
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	23
Depression	11
Chronic Kidney Disease	17
Asthma	3
Osteoperosis	5
Atrial Fibrilation	7
Heart Failure	14
Chronic Obstructive Pulmonary Disease	20
Diabetes	33
Dementia	8
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2014 were lab tests, preventive care, blood draw and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	37
blood draw	260
diabetes management	198
doctor visit	1141
injections	37
lab tests	384
preventive care	271
vaccines	93

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	149
Female	167

**Ethnicity**
Non-Hispanic White	181
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	133
From 75 to 84	66
85 and over	19
Less than 65	98

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2014

Hypertension	75
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	25
Depression	13
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	0
Atrial Fibrilation	6
Heart Failure	13
Chronic Obstructive Pulmonary Disease	17
Diabetes	33
Dementia	7
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2015 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	42
blood draw	204
diabetes management	118
doctor visit	1041
hospital care	48
injections	42
inpatient care	48
lab tests	328
preventive care	183
vaccines	82

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	340
Female	372

**Ethnicity**
Non-Hispanic White	432
Black	258
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	290
From 75 to 84	146
85 and over	80
Less than 65	196

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2015

Hypertension	74
High Cholesterol	54
Stroke	7
Ischemic Heart Disease	26
Depression	14
Chronic Kidney Disease	24
Asthma	14
Osteoperosis	0
Atrial Fibrilation	8
Heart Failure	17
Chronic Obstructive Pulmonary Disease	22
Diabetes	37
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2016 were lab tests, preventive care, blood draw and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	63
blood draw	318
diabetes management	201
doctor visit	948
hospital care	150
injections	63
inpatient care	150
lab tests	408
preventive care	335
vaccines	151

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	194
Female	238

**Ethnicity**
Non-Hispanic White	277
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	178
From 75 to 84	110
85 and over	48
Less than 65	96

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2016

Hypertension	75
High Cholesterol	51
Stroke	9
Ischemic Heart Disease	30
Depression	23
Chronic Kidney Disease	37
Asthma	32
Osteoperosis	5
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	32
Diabetes	38
Dementia	15
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2017 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	22
blood draw	358
diabetes management	203
doctor visit	836
hospital care	141
injections	22
inpatient care	141
lab tests	369
preventive care	317
vaccines	129

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	192
Female	222

**Ethnicity**
Non-Hispanic White	266
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	153
From 75 to 84	99
85 and over	67
Less than 65	95

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2017

Hypertension	75
High Cholesterol	27
Stroke	7
Ischemic Heart Disease	29
Depression	20
Chronic Kidney Disease	39
Asthma	7
Osteoperosis	5
Atrial Fibrilation	13
Heart Failure	23
Chronic Obstructive Pulmonary Disease	27
Diabetes	40
Dementia	17
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2018 were blood draw, preventive care, lab tests and vaccines.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	48
blood draw	391
diabetes management	94
doctor visit	699
hospital care	54
injections	48
inpatient care	54
lab tests	207
preventive care	225
vaccines	131

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	155
Female	159

**Ethnicity**
Non-Hispanic White	205
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	134
From 75 to 84	77
85 and over	33
Less than 65	70

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2018

Hypertension	74
High Cholesterol	47
Stroke	8
Ischemic Heart Disease	27
Depression	18
Chronic Kidney Disease	32
Asthma	4
Osteoperosis	4
Atrial Fibrilation	13
Heart Failure	20
Chronic Obstructive Pulmonary Disease	24
Diabetes	38
Dementia	14
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2019 were preventive care, lab tests, diabetes management and blood draw.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	35
blood draw	144
diabetes management	171
doctor visit	681
injections	35
lab tests	290
preventive care	340
vaccines	87

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	128
Female	123

**Ethnicity**
Non-Hispanic White	159
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	122
From 75 to 84	61
85 and over	21
Less than 65	47

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2019

Hypertension	75
High Cholesterol	51
Stroke	6
Ischemic Heart Disease	23
Depression	14
Chronic Kidney Disease	31
Asthma	0
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	23
Diabetes	39
Dementia	11
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2020 were preventive care, lab tests, diabetes management and blood draw.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	27
blood draw	118
diabetes management	126
doctor visit	578
injections	27
lab tests	159
preventive care	317
vaccines	108

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	146
Female	199

**Ethnicity**
Non-Hispanic White	239
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	164
From 75 to 84	95
85 and over	33
Less than 65	53

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2020

Hypertension	69
High Cholesterol	48
Stroke	3
Ischemic Heart Disease	25
Depression	13
Chronic Kidney Disease	32
Asthma	3
Osteoperosis	4
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	18
Diabetes	32
Dementia	8
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2021 were lab tests, preventive care, blood draw and vaccines.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	27
blood draw	194
diabetes management	151
doctor visit	757
injections	27
lab tests	552
preventive care	527
vaccines	168

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	336
Female	363

**Ethnicity**
Non-Hispanic White	562
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	294
From 75 to 84	234
85 and over	91
Less than 65	80

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2021

Hypertension	75
High Cholesterol	64
Stroke	4
Ischemic Heart Disease	30
Depression	16
Chronic Kidney Disease	35
Asthma	5
Osteoperosis	7
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	13
Diabetes	34
Dementia	7
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2022 were lab tests, preventive care, blood draw and vaccines.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	23
blood draw	217
diabetes management	143
doctor visit	887
injections	23
lab tests	1018
preventive care	641
vaccines	198

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	250
Female	312

**Ethnicity**
Non-Hispanic White	500
Black	49
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	229
From 75 to 84	236
85 and over	62
Less than 65	35

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2022

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	20
Depression	17
Chronic Kidney Disease	27
Asthma	6
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	12
Chronic Obstructive Pulmonary Disease	17
Diabetes	27
Dementia	6
Cancer	16

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2023 were lab tests, preventive care, blood draw and vaccines.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	37
blood draw	282
diabetes management	162
doctor visit	950
injections	37
lab tests	973
preventive care	590
vaccines	201

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	301
Female	289

**Ethnicity**
Non-Hispanic White	529
Black	39
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	241
From 75 to 84	248
85 and over	71
Less than 65	30

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2023

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	24
Depression	19
Chronic Kidney Disease	25
Asthma	7
Osteoperosis	13
Atrial Fibrilation	18
Heart Failure	14
Chronic Obstructive Pulmonary Disease	17
Diabetes	27
Dementia	5
Cancer	15

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC during 2024 were lab tests, preventive care, blood draw and diabetes management.

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

aspiration	27
blood draw	439
diabetes management	168
doctor visit	899
injections	27
lab tests	1362
preventive care	683
vaccines	143

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Male	289
Female	270

**Ethnicity**
Non-Hispanic White	501
Black	34
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	215
From 75 to 84	240
85 and over	72
Less than 65	32

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2024

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	24
Depression	16
Chronic Kidney Disease	24
Asthma	8
Osteoperosis	13
Atrial Fibrilation	19
Heart Failure	12
Chronic Obstructive Pulmonary Disease	13
Diabetes	25
Dementia	5
Cancer	14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. John C. Callahan, M D for Medicare patients.

The highest averages for the top procedures that Dr. John C. Callahan, M D treated as a family medicine practitioner in Aurora, NC were lab tests, preventive care, blood draw and diabetes management.

aspiration	36
blood draw	261
diabetes management	166
doctor visit	896
hospital care	98
injections	36
inpatient care	98
lab tests	531
preventive care	394
vaccines	139

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. John C. Callahan, M D.

**Gender**
Female	222
Male	202

**Ethnicity**
Black / African American	29
Asian / Pacific Islander	0
Non-Hispanic White	310
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	128
85 and over	47
Less than 65	71
65 to 74	177

Average of Total of Conditions of Medicare patients treated by Dr. John C. Callahan, M D From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. John C. Callahan, M D treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	68
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	23
Depression	14
Chronic Kidney Disease	26
Asthma	6
Osteoporosis	5
Heart Failure	15
Chronic Obstructive Pulmonary Disease	18
Diabetes	31
Atrial Fibrillation	11
Dementia	8
Cancer	10

Education & Training

He has a state license in North Carolina.

Licensed In: North Carolina

Ratings & Reviews

Dr. John C. Callahan, M D has an exceptional overall rating with an average of 4.83 out of 5 stars based on 169 ratings. We collect ratings and reviews of Dr. John C. Callahan, M D from all over the web to help you find the right in Aurora, NC.

4.83

Overall Rating

(169 Ratings)

Leave a Review

General Payments

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

**Payments by Company**
Supernus Pharmaceuticals, Inc.	$353 TROKENDI XR $353
Novo Nordisk Inc	$320 RYBELSUS $143	Tresiba $41	Ozempic $36	Saxenda $22	Wegovy $21	Other $58
GlaxoSmithKline, LLC.	$317 TRELEGY ELLIPTA $118	BREO $105	AREXVY $43	INCRUSE $28	TANZEUM $13	Other $10
Lilly USA, LLC	$311 MOUNJARO $211	ZEPBOUND $89	EMGALITY $11
AstraZeneca Pharmaceuticals LP	$257 FARXIGA $89	AIRSUPRA $61	BREZTRI $32	SYMBICORT $31	BREZTRI AEROSPHERE $11	Other $33
Other	$1,384 Repatha $112	TOUJEO $102	Implate $100	ENTRESTO $90	Myrbetriq $69	Other $911

**Types of Payments**
Food and Beverage	$2,902
Education	$41

Biography

Dr. John Callahan specializes in family medicine. The average patient rating for Dr. Callahan is 5.0 stars (out of 5). Dr. Callahan completed his residency training at a hospital affiliated with Virginia Commonwealth University (VCU). According to Doctor.com, he is currently accepting new patients at his office in CHOCOWINITY, NC.

Select Year:

Dr. John C. Callahan, M D

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. John C. Callahan, M D in 2024

By Volume:

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. John C. Callahan, M D in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John C. Callahan, M D 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. John C. Callahan, M D From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography