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Dr. Thomas John Horn, MD

Accepting New Patients

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Specializes in: Adult Orthopedic Reconstructive Surgery

3525 Loma Vista Road
Ventura, CA 93003

(805) 641-6415

Dr. Thomas John Horn, MD is an orthopedic reconstructive surgeon in Ventura, CA specializing in adult orthopedic reconstructive surgery. Dr. Thomas John Horn, MD is affiliated with Dignity Health and St John's Regional Med Center/St John's Hospital Camarillo.

Office Locations

St John's Regional Med Center/St John's Hospital Camarillo

3525 Loma Vista Road
Ventura, CA 93003

(805) 641-6415

(805) 641-6424

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2012 were injections, aspiration, musculoskeletal imaging and X-rays.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	418
debridement (removal of unhealthy tissue)	17
decompression surgery	17
doctor visit	669
excision	17
hip imaging	114
injections	437
joint surgery	136
lower extremity surgery	71
minimally invasive procedures	112
musculoskeletal imaging	269
reconstructive surgery	24
upper extremity surgery	65
X-rays	269

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2013 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	445
decompression surgery	15
doctor visit	646
excision	14
hip imaging	77
injections	445
joint surgery	91
lower extremity surgery	49
minimally invasive procedures	78
musculoskeletal imaging	190
reconstructive surgery	13
upper extremity surgery	42
X-rays	190

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	119
Female	189

**Ethnicity**
Non-Hispanic White	277
Black	0
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	139
From 75 to 84	107
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2013

Hypertension	69
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	30
Depression	17
Chronic Kidney Disease	22
Asthma	9
Osteoperosis	6
Atrial Fibrilation	14
Heart Failure	14
Chronic Obstructive Pulmonary Disease	9
Diabetes	22
Dementia	6
Cancer	14

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2014 were aspiration, injections, musculoskeletal imaging and X-rays.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	475
doctor visit	701
hip imaging	144
injections	475
joint surgery	63
lower extremity surgery	63
minimally invasive procedures	35
MRI (magnetic resonance imaging)	59
musculoskeletal imaging	295
reconstructive surgery	28
X-rays	236

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	136
Female	207

**Ethnicity**
Non-Hispanic White	309
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	159
From 75 to 84	113
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2014

Hypertension	63
High Cholesterol	58
Stroke	5
Ischemic Heart Disease	33
Depression	17
Chronic Kidney Disease	23
Asthma	8
Osteoperosis	6
Atrial Fibrilation	16
Heart Failure	14
Chronic Obstructive Pulmonary Disease	9
Diabetes	20
Dementia	9
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2015 were aspiration, injections, musculoskeletal imaging and X-rays.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	496
debridement (removal of unhealthy tissue)	13
decompression surgery	16
doctor visit	678
excision	16
hip imaging	141
injections	496
joint surgery	123
lower extremity surgery	64
minimally invasive procedures	97
MRI (magnetic resonance imaging)	60
musculoskeletal imaging	292
reconstructive surgery	26
upper extremity surgery	59
X-rays	232

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	282
Female	352

**Ethnicity**
Non-Hispanic White	562
Black	0
Hispanic	32
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	302
From 75 to 84	222
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2015

Hypertension	64
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	16
Asthma	10
Osteoperosis	6
Atrial Fibrilation	14
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	22
Dementia	7
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2016 were aspiration, injections, musculoskeletal imaging and joint surgery.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	605
debridement (removal of unhealthy tissue)	14
decompression surgery	18
doctor visit	736
excision	13
hip imaging	38
injections	605
joint surgery	101
lower extremity surgery	40
minimally invasive procedures	88
MRI (magnetic resonance imaging)	61
musculoskeletal imaging	125
reconstructive surgery	13
upper extremity surgery	61
X-rays	64

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	160
Female	199

**Ethnicity**
Non-Hispanic White	315
Black	0
Hispanic	27
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	162
From 75 to 84	120
85 and over	63
Less than 65	14

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2016

Hypertension	65
High Cholesterol	52
Stroke	6
Ischemic Heart Disease	31
Depression	14
Chronic Kidney Disease	21
Asthma	13
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	9
Diabetes	19
Dementia	8
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2017 were aspiration, injections, musculoskeletal imaging and joint surgery.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	583
debridement (removal of unhealthy tissue)	18
decompression surgery	18
doctor visit	806
excision	17
hip imaging	34
injections	583
joint surgery	95
lower extremity surgery	27
minimally invasive procedures	81
MRI (magnetic resonance imaging)	74
musculoskeletal imaging	111
reconstructive surgery	14
spinal procedures	12
upper extremity surgery	68
X-rays	49

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	141
Female	236

**Ethnicity**
Non-Hispanic White	325
Black	0
Hispanic	30
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	147
From 75 to 84	147
85 and over	69
Less than 65	14

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2017

Hypertension	63
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	30
Depression	21
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	16
Chronic Obstructive Pulmonary Disease	10
Diabetes	19
Dementia	10
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2018 were aspiration, injections, musculoskeletal imaging and MRI (magnetic resonance imaging).

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	654
debridement (removal of unhealthy tissue)	13
decompression surgery	14
doctor visit	808
excision	12
hip imaging	44
injections	654
joint surgery	57
lower extremity surgery	18
minimally invasive procedures	57
MRI (magnetic resonance imaging)	58
musculoskeletal imaging	105
upper extremity surgery	39
X-rays	47

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	144
Female	257

**Ethnicity**
Non-Hispanic White	344
Black	0
Hispanic	32
Asian	11
Other	0
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	133
85 and over	74
Less than 65	18

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2018

Hypertension	63
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	32
Depression	20
Chronic Kidney Disease	20
Asthma	8
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	20
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2019 were aspiration, injections, joint surgery and musculoskeletal imaging.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	691
debridement (removal of unhealthy tissue)	15
decompression surgery	16
doctor visit	902
excision	16
hip imaging	32
injections	691
joint surgery	122
lower extremity surgery	64
minimally invasive procedures	87
MRI (magnetic resonance imaging)	59
musculoskeletal imaging	118
reconstructive surgery	35
upper extremity surgery	58
X-rays	59

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	182
Female	282

**Ethnicity**
Non-Hispanic White	396
Black	0
Hispanic	38
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	205
From 75 to 84	162
85 and over	77
Less than 65	20

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2019

Hypertension	69
High Cholesterol	58
Stroke	4
Ischemic Heart Disease	27
Depression	23
Chronic Kidney Disease	22
Asthma	11
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	20
Dementia	8
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2020 were aspiration, injections, musculoskeletal imaging and joint surgery.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	346
debridement (removal of unhealthy tissue)	14
decompression surgery	14
doctor visit	714
excision	13
hip imaging	31
injections	346
joint surgery	84
lower extremity surgery	31
minimally invasive procedures	72
MRI (magnetic resonance imaging)	48
musculoskeletal imaging	96
pelvic imaging	11
reconstructive surgery	12
upper extremity surgery	53
X-rays	59

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	150
Female	230

**Ethnicity**
Non-Hispanic White	326
Black	0
Hispanic	32
Asian	0
Other	11
Native American	0

**Age**
From 65 to 74	180
From 75 to 84	141
85 and over	47
Less than 65	12

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2020

Hypertension	67
High Cholesterol	59
Stroke	6
Ischemic Heart Disease	29
Depression	26
Chronic Kidney Disease	29
Asthma	9
Osteoperosis	11
Atrial Fibrilation	11
Heart Failure	14
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2021 were aspiration, injections, musculoskeletal imaging and MRI (magnetic resonance imaging).

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	338
doctor visit	667
hip imaging	26
injections	338
joint surgery	31
lower extremity surgery	31
minimally invasive procedures	15
MRI (magnetic resonance imaging)	40
musculoskeletal imaging	71
reconstructive surgery	16
X-rays	31

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	131
Female	201

**Ethnicity**
Non-Hispanic White	286
Black	0
Hispanic	21
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	149
From 75 to 84	129
85 and over	42
Less than 65	12

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2021

Hypertension	66
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	29
Depression	20
Chronic Kidney Disease	26
Asthma	7
Osteoperosis	16
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	24
Dementia	7
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA during 2022 were aspiration and injections.

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

aspiration	101
doctor visit	152
injections	101

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	46
Female	80

**Ethnicity**
Non-Hispanic White	101
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	42
From 75 to 84	62
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	25
Depression	20
Chronic Kidney Disease	22
Asthma	16
Osteoperosis	21
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	10
Diabetes	23
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Thomas John Horn, MD for Medicare patients.

The highest averages for the top procedures that Dr. Thomas John Horn, MD treated as an orthopedic reconstructive surgeon in Ventura, CA were injections, aspiration, musculoskeletal imaging and X-rays.

aspiration	468
debridement (removal of unhealthy tissue)	14
decompression surgery	16
doctor visit	679
excision	14
hip imaging	68
injections	470
joint surgery	90
lower extremity surgery	45
minimally invasive procedures	72
MRI (magnetic resonance imaging)	57
musculoskeletal imaging	167
pelvic imaging	11
reconstructive surgery	20
spinal procedures	12
upper extremity surgery	55
X-rays	123

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Thomas John Horn, MD.

**Gender**
Male	135
Female	203

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	1
Non-Hispanic White	294
Hispanic	22
Native American / Alaskan Native	0
Other	2

**Age**
75 to 84	121
85 and over	33
Less than 65	8
65 to 74	151

Average of Total of Conditions of Medicare patients treated by Dr. Thomas John Horn, MD From 2012 - 2022

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

Hypertension	60
High Cholesterol	52
Stroke	3
Ischemic Heart Disease	26
Depression	17
Chronic Kidney Disease	20
Asthma	9
Osteoporosis	9
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	19
Atrial Fibrillation	12
Cancer	11
Dementia	6

Education & Training

He completed residency at George Washington University Medical Center. He is certified by the Orthopaedic Surgery and has a state license in California.

Residency: George Washington University Medical Center

Board Certification: Orthopaedic Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Thomas John Horn, MD is associated with these hospitals and organizations:

Dignity Health

St John's Regional Med Center/St John's Hospital Camarillo

Ratings & Reviews

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General Payments

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

**Payments by Company**
Zimmer Biomet Holdings, Inc.	$495 Echo $131	KNEES $111	AccuFill $98	mymobility Platform $65	Biomet Orthopak $46	Other $43
Musculoskeletal Transplant Foundation Inc.	$392 $392
Stryker Corporation	$323 T2 $157	KNEES $120	TRAUMA & EXTREMITIES $46
DePuy Synthes Sales Inc.	$261 TFN-Advance $125	Symphony $79	ORTHOVISC $39	Early Intervention $12	Sports_Early Intervention $7
Smith & Nephew, Inc.	$188 MULTIFIX S $81	Meniscal Root Repair System $42	$65
Other	$343 HawkOne $55	Aptus $49	Zilretta $48	AlloDerm $30	KYPHON Balloon Kyphoplasty $23	Other $139

**Types of Payments**
Food and Beverage	$1,610
Travel and Lodging	$392

Biography

Dr. Thomas Horn works as an adult orthopedic reconstructive surgery. Dr. Horn's medical residency was performed at George Washington University Medical Center. He is professionally affiliated with Dignity Health. According to Dignity Health, new patients are welcome to contact his office in Ventura, CA.

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Dr. Thomas John Horn, MD

Office Locations

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. Thomas John Horn, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas John Horn, 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. Thomas John Horn, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

Other Providers in Ventura, CA