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Dr. Louis Chang, MD

Accepting New Patients

(Louis Chang, MD)

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Specializes in: Neurosurgery

SUNY Downstate Medical Center College of Medicine (2004)

10215 Fernwood Road Suite 412
Bethesda, MD 20817

(301) 896-6069

Dr. Louis Chang, MD is a neurosurgeon in Bethesda, MD specializing in neurosurgery. He graduated from SUNY Downstate Medical Center College of Medicine in 2004 and has 22 years of experience. Dr. Louis Chang, MD is affiliated with Johns Hopkins University and Johns Hopkins Health Care & Surgery Center — Bethesda.

Office Locations

10215 Fernwood Road Suite 412
Bethesda, MD 20817

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301 Mason Lord Drive Suite 1201
Baltimore, MD 21224

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Noteworthy Medicare Patient Procedures Performed by Dr. Louis Chang, MD in 2023

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

Top 5%

By Volume:

emergency room care

inpatient hospital care

By Affordability:

emergency care

emergency room care

In 2023, among providers in related specialties within Maryland, Dr. Louis Chang, MD performed more emergency room (ER) care, and inpatient hospital care (for patient admitted to hospital) procedures for Medicare patients than 95% of them and he also had a list price for emergency care, and emergency room (ER) care 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 25%

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2012, Dr. Louis Chang, MD 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 providers in related specialties within Maryland. 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. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2012 were hospital care, inpatient care, spinal procedures and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	15
doctor visit	234
hospital care	76
inpatient care	76
spinal procedures	15

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2013 were hospital care, inpatient care, spinal procedures and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	12
doctor visit	150
hospital care	65
inpatient care	65
spinal procedures	25

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	91
Female	127

**Ethnicity**
Non-Hispanic White	160
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	73
From 75 to 84	65
85 and over	23
Less than 65	57

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2013

Hypertension	75
High Cholesterol	70
Stroke	19
Ischemic Heart Disease	44
Depression	36
Chronic Kidney Disease	36
Asthma	16
Osteoperosis	15
Atrial Fibrilation	12
Heart Failure	28
Chronic Obstructive Pulmonary Disease	27
Diabetes	37
Dementia	21
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2014 were spinal procedures, hospital care, inpatient care and arthrodesis (bone fusion surgery).

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	28
decompression surgery	27
doctor visit	246
hospital care	62
inpatient care	62
minimally invasive procedures	12
nerve procedures	27
spinal procedures	83

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	101
Female	138

**Ethnicity**
Non-Hispanic White	185
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	82
From 75 to 84	60
85 and over	22
Less than 65	75

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2014

Hypertension	75
High Cholesterol	65
Stroke	20
Ischemic Heart Disease	39
Depression	43
Chronic Kidney Disease	29
Asthma	11
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	22
Chronic Obstructive Pulmonary Disease	24
Diabetes	44
Dementia	16
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2015 were spinal procedures, hospital care, inpatient care and nerve procedures.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	26
decompression surgery	31
doctor visit	227
hospital care	32
inpatient care	32
minimally invasive procedures	12
neck surgery	14
nerve procedures	31
spinal procedures	68

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	188
Female	258

**Ethnicity**
Non-Hispanic White	318
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	140
From 75 to 84	102
85 and over	34
Less than 65	170

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2015

Hypertension	75
High Cholesterol	64
Stroke	16
Ischemic Heart Disease	37
Depression	41
Chronic Kidney Disease	28
Asthma	22
Osteoperosis	7
Atrial Fibrilation	8
Heart Failure	15
Chronic Obstructive Pulmonary Disease	26
Diabetes	39
Dementia	10
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2016 were hospital care, inpatient care and spinal procedures.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

doctor visit	178
hospital care	31
inpatient care	31
spinal procedures	12

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	70
Female	98

**Ethnicity**
Non-Hispanic White	135
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	70
From 75 to 84	32
85 and over	18
Less than 65	48

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2016

Hypertension	75
High Cholesterol	54
Stroke	13
Ischemic Heart Disease	37
Depression	39
Chronic Kidney Disease	36
Asthma	28
Osteoperosis	10
Atrial Fibrilation	7
Heart Failure	15
Chronic Obstructive Pulmonary Disease	26
Diabetes	40
Dementia	18
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2017 were spinal procedures, hospital care, inpatient care and minimally invasive procedures.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	21
decompression surgery	15
doctor visit	215
hospital care	39
inpatient care	39
minimally invasive procedures	21
nerve procedures	15
spinal procedures	82

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	73
Female	127

**Ethnicity**
Non-Hispanic White	158
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	72
From 75 to 84	45
85 and over	23
Less than 65	60

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2017

Hypertension	75
High Cholesterol	60
Stroke	14
Ischemic Heart Disease	42
Depression	40
Chronic Kidney Disease	41
Asthma	14
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	20
Chronic Obstructive Pulmonary Disease	28
Diabetes	41
Dementia	18
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2018 were spinal procedures, hospital care, inpatient care and nerve procedures.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	20
decompression surgery	27
doctor visit	262
hospital care	47
inpatient care	47
minimally invasive procedures	20
nerve procedures	27
spinal procedures	68

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	95
Female	161

**Ethnicity**
Non-Hispanic White	205
Black	40
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	101
From 75 to 84	67
85 and over	25
Less than 65	63

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2018

Hypertension	75
High Cholesterol	67
Stroke	13
Ischemic Heart Disease	43
Depression	43
Chronic Kidney Disease	38
Asthma	10
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	25
Diabetes	37
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2019 were minimally invasive procedures, spinal procedures, arthrodesis (bone fusion surgery) and hospital care.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

arthrodesis (bone fusion surgery)	14
doctor visit	183
hospital care	12
inpatient care	12
minimally invasive procedures	14
spinal procedures	14

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	60
Female	100

**Ethnicity**
Non-Hispanic White	131
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	72
From 75 to 84	37
85 and over	13
Less than 65	38

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2019

Hypertension	75
High Cholesterol	66
Stroke	11
Ischemic Heart Disease	37
Depression	38
Chronic Kidney Disease	36
Asthma	10
Osteoperosis	7
Atrial Fibrilation	9
Heart Failure	16
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Dementia	11
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2020 were hospital care and inpatient care.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

doctor visit	24
hospital care	26
inpatient care	26

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	29
Female	35

**Ethnicity**
Non-Hispanic White	27
Black	25
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	24
From 75 to 84	23
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	22
Ischemic Heart Disease	72
Depression	47
Chronic Kidney Disease	55
Asthma	19
Osteoperosis	0
Atrial Fibrilation	20
Heart Failure	44
Chronic Obstructive Pulmonary Disease	0
Diabetes	70
Dementia	31
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2021 were hospital care, inpatient care and spinal procedures.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

doctor visit	75
hospital care	58
inpatient care	58
spinal procedures	12

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	54
Female	82

**Ethnicity**
Non-Hispanic White	63
Black	40
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	53
From 75 to 84	44
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	20
Ischemic Heart Disease	63
Depression	35
Chronic Kidney Disease	51
Asthma	19
Osteoperosis	15
Atrial Fibrilation	17
Heart Failure	43
Chronic Obstructive Pulmonary Disease	26
Diabetes	51
Dementia	29
Cancer	16

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD during 2022 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

doctor visit	163
emergency care	18
hospital care	86
inpatient care	86

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	81
Female	115

**Ethnicity**
Non-Hispanic White	135
Black	37
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	66
85 and over	34
Less than 65	19

Conditions of Medicare patients treated by Dr. Louis Chang, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	30
Ischemic Heart Disease	34
Depression	31
Chronic Kidney Disease	21
Asthma	19
Osteoperosis	18
Atrial Fibrilation	20
Heart Failure	24
Chronic Obstructive Pulmonary Disease	18
Diabetes	33
Dementia	15
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Louis Chang, MD for Medicare patients.

The highest averages for the top procedures that Dr. Louis Chang, MD treated as a neurosurgeon in Bethesda, MD were hospital care, inpatient care, spinal procedures and nerve procedures.

arthrodesis (bone fusion surgery)	19
decompression surgery	25
doctor visit	177
emergency care	18
hospital care	48
inpatient care	48
minimally invasive procedures	15
neck surgery	14
nerve procedures	25
spinal procedures	42

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Louis Chang, MD.

**Gender**
Male	76
Female	112

**Ethnicity**
Black / African American	12
Asian / Pacific Islander	0
Non-Hispanic White	137
Native American / Alaskan Native	0
Hispanic	1
Other	0

**Age**
75 to 84	49
85 and over	17
Less than 65	48
65 to 74	69

Average of Total of Conditions of Medicare patients treated by Dr. Louis Chang, MD From 2012 - 2022

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

Hypertension	68
High Cholesterol	61
Stroke	16
Ischemic Heart Disease	40
Depression	35
Chronic Kidney Disease	33
Asthma	15
Osteoporosis	9
Heart Failure	22
Chronic Obstructive Pulmonary Disease	20
Diabetes	38
Atrial Fibrillation	12
Dementia	16
Cancer	10

Education & Training

Dr. Louis Chang, MD graduated from SUNY Downstate Medical Center College of Medicine in 2004. He has a state license in Maryland.

Medical School: SUNY Downstate Medical Center College of Medicine (2004)

Licensed In: Maryland

Affiliations & Hospitals

Dr. Louis Chang, MD is associated with these hospitals and organizations:

Johns Hopkins University

Johns Hopkins Health Care & Surgery Center — Bethesda

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General Payments

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

**Payments by Company**
NUVASIVE, INC.	$10,407 XLIF $4,347	Pulse $1,221	ALIF $975	Propel $549	Modulus $472	Other $2,843
Globus Medical, Inc.	$5,741 ExcelsiusGPS Robotic Navigation System $2,252	Excelsius Robotics System $1,751	EXCELSIUS $1,104	CREO $306	SABLE $141	Other $186
Zimmer Biomet Holdings, Inc.	$4,675 Mobi-C $1,484	TriCor $1,296	Timberline $655	Spine $417	Timberline MPF $184	Other $639
Spineology Inc.	$2,569 Spine Devices $2,569
Boston Scientific Corporation	$1,866 GENERAL - PAIN MANAGEMENT $576	SPECTRA WAVEWRITER $394	PAIN MANAGEMENT $380	SPECTRA SYSTEM $223	WaveWriter Alpha Prime 16 $163	Other $129
Other	$2,331 iFuse Implant $360	Spine $243	INTELLIS $216	SPECIFY $171	LUCENTIS $138	Other $1,204

**Types of Payments**
Food and Beverage	$13,657
Travel and Lodging	$8,002
Consulting Fee	$5,200
Education	$577
Entertainment	$152

Research Payments

Dr. Louis Chang, MD has received 2 research payments totaling $17,581.

Biography

Dr. Louis Chang's specialty is neurosurgery. Dr. Chang is affiliated with Johns Hopkins University. He is a graduate of SUNY Downstate Medical Center College of Medicine. Yext reports that he is accepting new patients at his office in Bethesda, MD.