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Dr. John Terrill Main, DO

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Specializes in: Neurosurgery
Professional interests include: dislocation, spinal stenosis, fractures (broken bones), and more.
1725 Se 28th Loop Suite 102
Ocala, FL 34471

Dr. John Terrill Main, DO is a neurosurgeon in Ocala, FL specializing in neurosurgery. Dr. John Terrill Main, DO is affiliated with HCA Florida Healthcare, HCA Florida Ocala Hospital, CORA HEALTH SERVICES, INC and OCALA HEALTH SURGICAL GROUP LLC.

View Doctor's Full Profile (352) 629-1743

Office Locations

HCA Florida Ocala Hospital

1725 Se 28th Loop Suite 102
Ocala, FL 34471
(352) 629-1743
open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. John Terrill Main, DO in 2023

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

Top 25%

By Volume:

360-degree lumbar fusion
cervical spine surgery
inpatient hospital care
lumbar fusion
spinal fusion
spine surgery procedures

By Affordability:

hospital care
inpatient care
inpatient hospital care

In 2013, among providers in related specialties within Florida, Dr. John Terrill Main, DO performed more 360-degree lumbar fusion, cervical spine surgery, inpatient hospital care (for patient admitted to hospital), lumbar fusion, spinal fusion, and spine surgery procedures procedures for Medicare patients than 75% of them and he also had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) 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

2013 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2013 were spinal procedures, nerve procedures, decompression surgery and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 45
decompression surgery 46
doctor visit 467
minimally invasive procedures 21
neck surgery 24
nerve procedures 46
spinal procedures 141

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 136
Female 161
Ethnicity
Non-Hispanic White 231
Black 0
Hispanic 0
Asian 0
Other 0
Native American 54
Age
From 65 to 74 123
From 75 to 84 57
85 and over 15
Less than 65 102

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2013

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2013 were hypertension, high cholesterol, ischemic heart disease and depression.

Hypertension 72
High Cholesterol 47
Stroke 5
Ischemic Heart Disease 36
Depression 33
Chronic Kidney Disease 17
Asthma 9
Osteoperosis 8
Atrial Fibrilation 7
Heart Failure 17
Chronic Obstructive Pulmonary Disease 19
Diabetes 30
Dementia 8
Cancer 8

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2014 were spinal procedures, nerve procedures, decompression surgery and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 40
aspiration 13
bone marrow tests 13
decompression surgery 51
doctor visit 485
minimally invasive procedures 13
neck surgery 27
nerve procedures 51
spinal procedures 115

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 140
Female 197
Ethnicity
Non-Hispanic White 264
Black 0
Hispanic 0
Asian 0
Other 0
Native American 47
Age
From 65 to 74 147
From 75 to 84 47
85 and over 12
Less than 65 131

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2014

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2014 were hypertension, high cholesterol, depression and ischemic heart disease.

Hypertension 74
High Cholesterol 46
Stroke 4
Ischemic Heart Disease 39
Depression 39
Chronic Kidney Disease 21
Asthma 11
Osteoperosis 9
Atrial Fibrilation 8
Heart Failure 14
Chronic Obstructive Pulmonary Disease 24
Diabetes 33
Dementia 5
Cancer 8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2015 were spinal procedures, rehabilitation, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 81
aspiration 13
bone marrow tests 13
decompression surgery 94
doctor visit 728
minimally invasive procedures 36
neck surgery 45
nerve procedures 94
rehabilitation 120
spinal procedures 305
X-rays 70

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 376
Female 574
Ethnicity
Non-Hispanic White 662
Black 102
Hispanic 0
Asian 0
Other 0
Native American 142
Age
From 65 to 74 338
From 75 to 84 150
85 and over 34
Less than 65 428

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2015

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2015 were hypertension, high cholesterol, depression and diabetes.

Hypertension 70
High Cholesterol 48
Stroke 4
Ischemic Heart Disease 32
Depression 40
Chronic Kidney Disease 20
Asthma 19
Osteoperosis 11
Atrial Fibrilation 6
Heart Failure 16
Chronic Obstructive Pulmonary Disease 20
Diabetes 35
Dementia 6
Cancer 6

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2016 were spinal procedures, X-rays, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 82
decompression surgery 92
doctor visit 714
minimally invasive procedures 27
neck surgery 55
nerve procedures 92
spinal procedures 350
X-rays 103

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 187
Female 276
Ethnicity
Non-Hispanic White 331
Black 51
Hispanic 0
Asian 0
Other 0
Native American 65
Age
From 65 to 74 175
From 75 to 84 84
85 and over 17
Less than 65 187

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2016

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2016 were hypertension, high cholesterol, depression and diabetes.

Hypertension 71
High Cholesterol 48
Stroke 6
Ischemic Heart Disease 36
Depression 38
Chronic Kidney Disease 30
Asthma 25
Osteoperosis 12
Atrial Fibrilation 5
Heart Failure 17
Chronic Obstructive Pulmonary Disease 21
Diabetes 37
Dementia 8
Cancer 6

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2017 were spinal procedures, X-rays, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 52
decompression surgery 60
doctor visit 672
minimally invasive procedures 16
neck surgery 22
nerve procedures 60
spinal procedures 305
X-rays 155

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 145
Female 255
Ethnicity
Non-Hispanic White 287
Black 33
Hispanic 0
Asian 0
Other 0
Native American 69
Age
From 65 to 74 165
From 75 to 84 0
85 and over 0
Less than 65 162

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2017

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2017 were hypertension, high cholesterol, depression and ischemic heart disease.

Hypertension 70
High Cholesterol 46
Stroke 5
Ischemic Heart Disease 37
Depression 41
Chronic Kidney Disease 28
Asthma 11
Osteoperosis 9
Atrial Fibrilation 4
Heart Failure 15
Chronic Obstructive Pulmonary Disease 20
Diabetes 35
Dementia 9
Cancer 5

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2018 were spinal procedures, hospital care, inpatient care and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 32
doctor visit 220
hospital care 44
inpatient care 44
neck surgery 13
spinal procedures 71

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 118
Female 143
Ethnicity
Non-Hispanic White 227
Black 0
Hispanic 11
Asian 0
Other 0
Native American 11
Age
From 65 to 74 98
From 75 to 84 97
85 and over 26
Less than 65 40

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2018

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2018 were high cholesterol, hypertension, ischemic heart disease and depression.

Hypertension 75
High Cholesterol 75
Stroke 16
Ischemic Heart Disease 51
Depression 43
Chronic Kidney Disease 41
Asthma 8
Osteoperosis 11
Atrial Fibrilation 13
Heart Failure 23
Chronic Obstructive Pulmonary Disease 27
Diabetes 39
Dementia 21
Cancer 13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2019 were spinal procedures, arthrodesis (bone fusion surgery), nerve procedures and decompression surgery.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 52
decompression surgery 36
doctor visit 316
hospital care 18
inpatient care 18
neck surgery 31
nerve procedures 36
spinal procedures 120

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 123
Female 176
Ethnicity
Non-Hispanic White 271
Black 13
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 119
From 75 to 84 120
85 and over 26
Less than 65 34

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2019

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2019 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension 75
High Cholesterol 75
Stroke 14
Ischemic Heart Disease 49
Depression 39
Chronic Kidney Disease 48
Asthma 9
Osteoperosis 12
Atrial Fibrilation 15
Heart Failure 23
Chronic Obstructive Pulmonary Disease 23
Diabetes 33
Dementia 15
Cancer 11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2020 were spinal procedures, arthrodesis (bone fusion surgery), nerve procedures and decompression surgery.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 34
decompression surgery 13
doctor visit 179
neck surgery 13
nerve procedures 13
spinal procedures 100

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 106
Female 115
Ethnicity
Non-Hispanic White 199
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 76
From 75 to 84 83
85 and over 19
Less than 65 43

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2020

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2020 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension 75
High Cholesterol 75
Stroke 12
Ischemic Heart Disease 47
Depression 37
Chronic Kidney Disease 42
Asthma 8
Osteoperosis 13
Atrial Fibrilation 14
Heart Failure 25
Chronic Obstructive Pulmonary Disease 19
Diabetes 31
Dementia 14
Cancer 10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2021 were spinal procedures, arthrodesis (bone fusion surgery), nerve procedures and decompression surgery.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 33
decompression surgery 11
doctor visit 198
neck surgery 11
nerve procedures 11
spinal procedures 71

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 90
Female 123
Ethnicity
Non-Hispanic White 187
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 68
From 75 to 84 82
85 and over 26
Less than 65 37

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2021

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2021 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension 75
High Cholesterol 75
Stroke 20
Ischemic Heart Disease 55
Depression 45
Chronic Kidney Disease 45
Asthma 7
Osteoperosis 14
Atrial Fibrilation 16
Heart Failure 27
Chronic Obstructive Pulmonary Disease 27
Diabetes 36
Dementia 20
Cancer 15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2022 were spinal procedures, arthrodesis (bone fusion surgery), hospital care and inpatient care.

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 29
doctor visit 117
hospital care 17
inpatient care 17
neck surgery 13
spinal procedures 64

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 82
Female 104
Ethnicity
Non-Hispanic White 167
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 64
From 75 to 84 73
85 and over 27
Less than 65 22

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2022

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2022 were high cholesterol, hypertension, ischemic heart disease and depression.

Hypertension 75
High Cholesterol 75
Stroke 34
Ischemic Heart Disease 48
Depression 41
Chronic Kidney Disease 38
Asthma 9
Osteoperosis 20
Atrial Fibrilation 30
Heart Failure 23
Chronic Obstructive Pulmonary Disease 30
Diabetes 33
Dementia 18
Cancer 17

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL during 2023 were hospital care, inpatient care, spinal procedures and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

arthrodesis (bone fusion surgery) 48
decompression surgery 14
doctor visit 59
hospital care 147
inpatient care 147
neck surgery 30
nerve procedures 14
spinal procedures 115

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 118
Female 108
Ethnicity
Non-Hispanic White 213
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 71
From 75 to 84 101
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. John Terrill Main, DO in 2023

The most common conditions of Medicare patients that Dr. John Terrill Main, DO treated during 2023 were high cholesterol, hypertension, ischemic heart disease and depression.

Hypertension 75
High Cholesterol 75
Stroke 31
Ischemic Heart Disease 52
Depression 44
Chronic Kidney Disease 41
Asthma 12
Osteoperosis 14
Atrial Fibrilation 32
Heart Failure 26
Chronic Obstructive Pulmonary Disease 30
Diabetes 42
Dementia 26
Cancer 21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. John Terrill Main, DO for Medicare patients.

The highest averages for the top procedures that Dr. John Terrill Main, DO treated as a neurosurgeon in Ocala, FL were spinal procedures, rehabilitation, X-rays and hospital care.

arthrodesis (bone fusion surgery) 48
aspiration 13
bone marrow tests 13
decompression surgery 46
doctor visit 377
hospital care 56
inpatient care 56
minimally invasive procedures 22
neck surgery 25
nerve procedures 46
rehabilitation 120
spinal procedures 159
X-rays 109

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. John Terrill Main, DO.

Gender
Male 147
Female 202
Ethnicity
Black / African American 18
Asian / Pacific Islander 0
Non-Hispanic White 276
Native American / Alaskan Native 35
Hispanic 1
Other 0
Age
75 to 84 81
85 and over 18
Less than 65 107
65 to 74 131

Average of Total of Conditions of Medicare patients treated by Dr. John Terrill Main, DO From 2013 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. John Terrill Main, DO treated were hypertension, high cholesterol, ischemic heart disease and depression.

Hypertension 73
High Cholesterol 62
Stroke 13
Ischemic Heart Disease 43
Depression 40
Chronic Kidney Disease 33
Asthma 11
Osteoporosis 12
Heart Failure 20
Chronic Obstructive Pulmonary Disease 23
Diabetes 34
Atrial Fibrillation 13
Cancer 10
Dementia 13

Education & Training

He completed residency at Hahnemann University Hospital. He has a state license in Oklahoma.

Residency: Hahnemann University Hospital (2004)

Licensed In: Oklahoma

Affiliations & Hospitals

Dr. John Terrill Main, DO is associated with these hospitals and organizations:

HCA Florida Healthcare
HCA Florida Ocala Hospital
CORA HEALTH SERVICES, INC
OCALA HEALTH SURGICAL GROUP LLC

Ratings & Reviews

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General Payments

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

Payments by Company
Omnia Medical, LLC $1,614,000
$1,614,000
Mid America Management, LLC $822,644 Surgical Implants
$822,644
Centinel Spine, Inc. $9,168 STALIF L
$5,000 		STALIF C
$4,000 		MIDLINE II-Ti
$168
NUVASIVE, INC. $1,793 Thoracolumbar
$1,793
Centinel Spine, LLC $438 STALIF C
$173 		PRODISC L
$155 		PRODISC C
$110
Other $2,350 Dark Star
$230 		PAIN MANAGEMENT
$199 		spinal-stim
$182 		CATALYFT PL EXPANDABLE INTERBODY SYSTEM
$153 		Senza Spinal Cord Stimulation System
$115 		Other
$1,470
Types of Payments
Acquisitions $1,254,000
Education $822,644
Royalty or License $360,000
Consulting Fee $9,000
Food and Beverage $3,019
Other $1,731

Biography

Dr. John Main is a specialist in neurosurgery. He works in Ocala, FL. His areas of expertise include the following: vertebroplasty, dislocation, and medical exams. For his residency, Dr. Main trained at Hahnemann University Hospital. Dr. Main is affiliated with HCA Florida Healthcare.

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