Procedure Volume Patient Data Patient Conditions Reviews General Payments Back to Top

Home > NY Providers > Sports Medicine Doctors

Dr. John J. Brennan, MD

(1 Rating)

Specializes in: Sports Medicine and Orthopedics/Orthopedic Surgery

6 Technology Drive Suite 100
East Setauket, NY 11733

(631) 689-6698

Dr. John J. Brennan, MD is a sports medicine doctor in East Setauket, NY specializing in sports medicine and orthopedics/orthopedic surgery.

Office Locations

6 Technology Drive Suite 100
East Setauket, NY 11733

(631) 689-6698

(631) 751-5548

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. John J. Brennan, MD in 2023

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

Top 5%

By Volume:

major joint aspiration

major joint injection

In 2023, Dr. John J. Brennan, MD performed more major joint aspiration, and major joint injection procedures for Medicare patients than 95% of providers in related specialties within New York.

Top 10%

By Volume:

spine X-ray

In 2023, Dr. John J. Brennan, MD performed more spine X-ray procedures for Medicare patients than 90% of providers in related specialties within New York.

Top 25%

By Volume:

total knee replacement

In 2012, Dr. John J. Brennan, MD performed more total knee replacement procedures for Medicare patients than 75% of providers in related specialties within New York.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2012 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	341
doctor visit	751
hip imaging	53
injections	341
joint surgery	11
lower extremity surgery	11
minimally invasive procedures	11
MRI (magnetic resonance imaging)	15
musculoskeletal imaging	244
pelvic imaging	62
spinal procedures	27
X-rays	318

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2013 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	366
decompression surgery	13
doctor visit	645
excision	11
injections	366
joint surgery	35
minimally invasive procedures	35
musculoskeletal imaging	187
pelvic imaging	29
upper extremity surgery	35
X-rays	216

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	180
Female	249

**Ethnicity**
Non-Hispanic White	398
Black	13
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	213
From 75 to 84	112
85 and over	61
Less than 65	43

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2013

Hypertension	69
High Cholesterol	63
Stroke	3
Ischemic Heart Disease	41
Depression	15
Chronic Kidney Disease	17
Asthma	7
Osteoperosis	7
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	29
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2014 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	489
decompression surgery	11
doctor visit	769
excision	11
hip imaging	45
injections	489
joint surgery	38
lower extremity surgery	16
minimally invasive procedures	38
musculoskeletal imaging	250
pelvic imaging	57
spinal procedures	20
upper extremity surgery	22
X-rays	327

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	194
Female	281

**Ethnicity**
Non-Hispanic White	437
Black	16
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	241
From 75 to 84	131
85 and over	61
Less than 65	42

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2014

Hypertension	68
High Cholesterol	65
Stroke	3
Ischemic Heart Disease	37
Depression	15
Chronic Kidney Disease	15
Asthma	7
Osteoperosis	7
Atrial Fibrilation	12
Heart Failure	12
Chronic Obstructive Pulmonary Disease	8
Diabetes	34
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2015 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	495
doctor visit	760
hip imaging	45
injections	495
joint surgery	12
lower extremity surgery	12
musculoskeletal imaging	265
pelvic imaging	66
reconstructive surgery	12
spinal procedures	32
X-rays	363

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	404
Female	562

**Ethnicity**
Non-Hispanic White	898
Black	0
Hispanic	0
Asian	0
Other	26
Native American	0

**Age**
From 65 to 74	534
From 75 to 84	272
85 and over	102
Less than 65	58

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2015

Hypertension	70
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	38
Depression	10
Chronic Kidney Disease	15
Asthma	13
Osteoperosis	7
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	37
Dementia	5
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2016 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	599
decompression surgery	17
doctor visit	989
excision	16
hip imaging	13
injections	599
joint surgery	69
lower extremity surgery	18
minimally invasive procedures	51
MRI (magnetic resonance imaging)	13
musculoskeletal imaging	240
pelvic imaging	47
reconstructive surgery	18
spinal procedures	23
upper extremity surgery	51
X-rays	297

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	252
Female	343

**Ethnicity**
Non-Hispanic White	541
Black	0
Hispanic	18
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	313
From 75 to 84	166
85 and over	68
Less than 65	48

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2016

Hypertension	71
High Cholesterol	60
Stroke	3
Ischemic Heart Disease	35
Depression	14
Chronic Kidney Disease	22
Asthma	15
Osteoperosis	7
Atrial Fibrilation	11
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	32
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2017 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	721
decompression surgery	15
doctor visit	1295
excision	15
hip imaging	13
injections	721
joint surgery	56
lower extremity surgery	11
minimally invasive procedures	45
MRI (magnetic resonance imaging)	13
musculoskeletal imaging	247
pelvic imaging	40
reconstructive surgery	11
spinal procedures	23
upper extremity surgery	45
X-rays	297

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	321
Female	435

**Ethnicity**
Non-Hispanic White	705
Black	15
Hispanic	0
Asian	0
Other	17
Native American	0

**Age**
From 65 to 74	378
From 75 to 84	253
85 and over	79
Less than 65	46

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2017

Hypertension	68
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	37
Depression	15
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	30
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2018 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	707
decompression surgery	19
doctor visit	1088
excision	19
hip imaging	14
hospital care	23
injections	707
inpatient care	23
joint surgery	81
lower extremity surgery	27
minimally invasive procedures	54
MRI (magnetic resonance imaging)	14
musculoskeletal imaging	268
pelvic imaging	42
reconstructive surgery	27
spinal procedures	23
upper extremity surgery	54
X-rays	319

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	300
Female	423

**Ethnicity**
Non-Hispanic White	657
Black	17
Hispanic	0
Asian	0
Other	29
Native American	0

**Age**
From 65 to 74	360
From 75 to 84	235
85 and over	84
Less than 65	44

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2018

Hypertension	72
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	36
Depression	15
Chronic Kidney Disease	22
Asthma	8
Osteoperosis	8
Atrial Fibrilation	12
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2019 were aspiration, injections, X-rays and joint surgery.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	915
decompression surgery	12
doctor visit	1157
excision	13
hospital care	31
injections	915
inpatient care	31
joint surgery	92
lower extremity surgery	53
minimally invasive procedures	55
musculoskeletal imaging	60
pelvic imaging	35
reconstructive surgery	37
spinal procedures	35
upper extremity surgery	39
X-rays	130

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	324
Female	470

**Ethnicity**
Non-Hispanic White	725
Black	15
Hispanic	0
Asian	0
Other	39
Native American	0

**Age**
From 65 to 74	410
From 75 to 84	252
85 and over	83
Less than 65	49

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2019

Hypertension	68
High Cholesterol	70
Stroke	5
Ischemic Heart Disease	37
Depression	20
Chronic Kidney Disease	22
Asthma	8
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	27
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2020 were aspiration, injections, X-rays and spinal procedures.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	866
doctor visit	1022
hip imaging	11
hospital care	24
injections	866
inpatient care	24
joint surgery	11
lower extremity surgery	11
MRI (magnetic resonance imaging)	11
musculoskeletal imaging	36
pelvic imaging	44
reconstructive surgery	11
spinal procedures	55
X-rays	124

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	290
Female	433

**Ethnicity**
Non-Hispanic White	670
Black	12
Hispanic	0
Asian	0
Other	29
Native American	0

**Age**
From 65 to 74	361
From 75 to 84	261
85 and over	71
Less than 65	30

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2020

Hypertension	67
High Cholesterol	68
Stroke	3
Ischemic Heart Disease	37
Depression	18
Chronic Kidney Disease	23
Asthma	6
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	27
Dementia	7
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2021 were aspiration, injections, X-rays and joint surgery.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	848
doctor visit	1065
hip imaging	18
hospital care	21
injections	848
inpatient care	21
joint surgery	58
lower extremity surgery	47
minimally invasive procedures	26
MRI (magnetic resonance imaging)	18
musculoskeletal imaging	35
pelvic imaging	43
reconstructive surgery	32
spinal procedures	41
upper extremity surgery	11
X-rays	101

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	319
Female	462

**Ethnicity**
Non-Hispanic White	718
Black	0
Hispanic	14
Asian	0
Other	31
Native American	0

**Age**
From 65 to 74	388
From 75 to 84	271
85 and over	80
Less than 65	42

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2021

Hypertension	65
High Cholesterol	66
Stroke	5
Ischemic Heart Disease	37
Depression	21
Chronic Kidney Disease	23
Asthma	7
Osteoperosis	11
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	9
Diabetes	27
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY during 2022 were aspiration, injections, X-rays and spinal procedures.

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

aspiration	910
doctor visit	1173
hospital care	26
injections	910
inpatient care	26
joint surgery	22
lower extremity surgery	22
musculoskeletal imaging	23
pelvic imaging	34
reconstructive surgery	22
spinal procedures	57
X-rays	114

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	324
Female	469

**Ethnicity**
Non-Hispanic White	726
Black	0
Hispanic	12
Asian	0
Other	39
Native American	0

**Age**
From 65 to 74	358
From 75 to 84	325
85 and over	71
Less than 65	39

Conditions of Medicare patients treated by Dr. John J. Brennan, MD in 2022

Hypertension	74
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	28
Depression	18
Chronic Kidney Disease	14
Asthma	11
Osteoperosis	13
Atrial Fibrilation	17
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	5
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John J. Brennan, MD for Medicare patients.

The highest averages for the top procedures that Dr. John J. Brennan, MD treated as a sports medicine doctor in East Setauket, NY were aspiration, injections, X-rays and musculoskeletal imaging.

aspiration	659
decompression surgery	14
doctor visit	974
excision	14
hip imaging	26
hospital care	25
injections	659
inpatient care	25
joint surgery	44
lower extremity surgery	22
minimally invasive procedures	39
MRI (magnetic resonance imaging)	14
musculoskeletal imaging	168
pelvic imaging	45
reconstructive surgery	21
spinal procedures	33
upper extremity surgery	36
X-rays	236

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John J. Brennan, MD.

**Gender**
Male	264
Female	375

**Ethnicity**
Black / African American	8
Asian / Pacific Islander	0
Non-Hispanic White	588
Native American / Alaskan Native	0
Hispanic	4
Other	20

**Age**
75 to 84	207
85 and over	69
Less than 65	40
65 to 74	323

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

The highest averages of the most common conditions of Medicare patients that Dr. John J. Brennan, MD treated were hypertension, high cholesterol, ischemic heart disease and diabetes.

Hypertension	62
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	33
Depression	14
Chronic Kidney Disease	17
Asthma	8
Osteoporosis	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	27
Atrial Fibrillation	10
Dementia	6
Cancer	11

Education & Training

He has a state license in New York.

Licensed In: New York

Ratings & Reviews

Dr. John J. Brennan, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 1 ratings. We collect ratings and reviews of Dr. John J. Brennan, MD from all over the web to help you find the right in East Setauket, NY.

Overall Rating

(1 Rating)

Leave a Review

Reviews Left On DocSpot

Overall Rating: 5.0 2025-12-31

Dr. Brenan is the nicest, most efficient orthopedic doctor I have ever met.  He took the time to explain everything before I went in for surgery.  Post surgery went smoothly. and I have zero pain.

General Payments

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

**Payments by Company**
Zimmer Biomet Holdings, Inc.	$2,621 Juggerknot $2,308	HIPS $125	Arcos $108	Trauma $79
Medical Device Business Services, Inc.	$2,114 RIGIDLOOP $676	ACTIS $632	$806
Arthrex, Inc.	$2,091 $2,091
Zimmer Holding Inc	$1,736 Knee $1,736
DePuy Synthes Sales Inc.	$1,021 DYNACORD $213	ACTIS $140	VAPR $140	MILAGRO $118	RIGIDLOOP $100	Other $310
Other	$1,197 MAKOplasty $404	OASYS $163	VECTRIS $105	INVOKANA $92	Sports Medicine $90	Other $343

**Types of Payments**
Travel and Lodging	$7,268
Food and Beverage	$3,513

Biography

Dr. John Brennan's areas of specialization are orthopedics/orthopedic surgery and sports medicine; he sees patients in East Setauket, NY. He studied medicine at SUNY Downstate Medical Center College of Medicine.