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Home > CA Providers > Neurosurgeons

Dr. Jefferson William Chen, PhD, MD

(244 Ratings)

Specializes in: Neurosurgery

Johns Hopkins University School of Medicine

Professional interests include: normal pressure hydrocephalus, stroke, cancer, and more.

501 N Graham Street Pacific Neursurgical Pc #580
Portland, OR 97227

(503) 788-6721

Dr. Jefferson William Chen, PhD, MD is a neurosurgeon in Orange, CA specializing in neurosurgery. He graduated from Johns Hopkins University School of Medicine. Dr. Jefferson William Chen, PhD, MD is affiliated with UCI Health.

Office Locations

101 The City Drive South Building 30
Orange, CA 92868

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19210 Jamboree Road
Irvine, CA 92612

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501 N Graham Street Pacific Neursurgical Pc #580
Portland, OR 97227

(503) 788-6721

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Some issues Dr. Jefferson William Chen, PhD, MD can help you with:

Stroke

A stroke is a medical emergency that occurs when a blood vessel supplying oxygen and nutrients to the brain is ruptured or blocked. The brain cannot function without a steady supply of oxygen and nutrients, so when the blood supply to the brain is interrupted, even for a brief moment, brain cells begin to die. When a sufficient number of brain cells die, the brain itself can no longer function, meaning that strokes are very dangerous. Strokes can result in impaired movement, speech, cognitive ability, the impairment of important physical functions, and even death.

Anyone can have a stroke, regardless of age and health. Strokes are known to happen at random. However, certain conditions and behaviors can increase one's risk of stroke over time.

Risk factors for stroke include:

Heart disease
Older age
Smoking
Diabetes
High blood pressure
High blood cholesterol and lipids

There are two main types of stroke: ischemic stroke and hemorrhagic stroke. Ischemic stroke occurs more commonly and is when a blood vessel in the brain becomes blocked. Blockages are caused by blood clots and built-up plaque (deposits of fat and cholesterol), which leads to atherosclerosis, a condition where the blood vessels narrow and harden. The resultant restricted blood flow may lead to an ischemic stroke by blocking essential oxygen to the brain, causing the heart to exert more effort to pump blood.

Hemorrhagic stroke occurs when a blood vessel in or around the brain ruptures. The burst vessel leaks blood into surrounding brain tissue, causing irreparable brain damage.

Hemorrhagic strokes are less common and may occur from head injuries, brain aneurysms, brain tumors, and bleeding disorders, amongst other conditions.

Both ischemic and hemorrhagic strokes require immediate medical treatment. Medical intervention can prevent severe and life-threatening brain damage. Signs of stroke include:

-Disorientation or confusion

-Difficulty speaking

-Difficulty walking

-Impaired vision

-Weakness in the face, legs, or arms

-Severe headaches

When someone suspected of having a stroke reaches the hospital, the patient will usually receive a CT or other scan that provides an image of the brain. The scan results can reveal clotted or leaking blood in the brain. Physical exams, neurological exams, and blood tests may also be used to check for blood clotting and sugar. Treatment begins generally immediately if a stroke is detected.

Medical treatment for ischemic strokes includes a thrombolytic medicine which breaks up and disperses blood clots. This medicine can greatly improve stroke recovery and long-term health. However, the thrombolytic medicine must be administered as soon as possible to achieve these results. Other treatments for ischemic strokes are blood thinners and thrombectomy, a surgical procedure to remove a blood clot in the brain. Thrombectomy is performed by inserting a catheter (thin needle) into the artery to reach the blood clot and mechanically remove it. With the clot removed, normal blood flow to the brain resumes. Thrombectomy is typically performed at most six hours after a patient shows signs of a stroke.

Hemorrhagic strokes are treated with blood-saving medication and surgery. For a hemorrhagic stroke caused by the rupture of an aneurysm (blood vessel bulges), surgery to stem the bleeding aneurysm and vessel may be used. One surgical technique is stent-assisted coiling, which adds a stent (small wire-meshed tube) into the blood vessel to block the leaking opening of the aneurysm. A non-surgical procedure is endovascular coiling, where a catheter (thin, hollow needle) places a platinum wire coil at the spot of the aneurysm. The coil blocks bleeding and prevents the aneurysm from continuing to leak blood. These procedures are usually combined with blood-thickening medications. Blood transfusions may be administered if substantial blood loss has occurred.

Since stroke patients may have lost some essential functions while the blood flow to their brains was obstructed, both ischemic stroke and hemorrhage stroke patients may receive post-stroke rehabilitation to rebuild their physical and mental abilities. Some restorative treatments include occupational, physical, and speech therapy. Patients may also receive care from neurologists, who can assist patients in recovering certain brain functions and cognitive abilities, and rehabilitation psychologists, who may help patients with their emotional, behavioral, and cognitive recovery. Some stroke patients require lengthy rehabilitation and may never fully regain function, while others may recover more quickly. While the fastest recovery improvements are usually seen in the first three or four months, stroke rehabilitation can last for years.

If someone begins to show signs of stroke, contact emergency services and call 9-1-1 immediately since blood flow must be restored as soon as possible to help avoid significant brain damage. If an ambulance takes the person to the hospital, paramedics can initiate stroke treatment as soon as the patient enters the ambulance, allowing for more prompt medical intervention and care.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

doctor visit	96
hospital care	247
inpatient care	247

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2013 were hospital care and inpatient care.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

doctor visit	63
hospital care	130
inpatient care	130

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	51
Female	48

**Age**
From 65 to 74	36
From 75 to 84	29
85 and over	17
Less than 65	17

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2013

Hypertension	66
High Cholesterol	47
Stroke	18
Ischemic Heart Disease	29
Depression	34
Chronic Kidney Disease	30
Asthma	0
Osteoperosis	0
Atrial Fibrilation	15
Heart Failure	21
Chronic Obstructive Pulmonary Disease	14
Diabetes	19
Dementia	33
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2014 were hospital care and inpatient care.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

doctor visit	33
hospital care	148
inpatient care	148

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	51
Female	52

**Ethnicity**
Non-Hispanic White	68
Black	0
Hispanic	0
Asian	18
Other	0
Native American	0

**Age**
From 65 to 74	34
From 75 to 84	36
85 and over	12
Less than 65	21

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2014

Hypertension	66
High Cholesterol	48
Stroke	27
Ischemic Heart Disease	38
Depression	35
Chronic Kidney Disease	28
Asthma	14
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	22
Chronic Obstructive Pulmonary Disease	15
Diabetes	37
Dementia	27
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2015 were hospital care and inpatient care.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

doctor visit	72
hospital care	135
inpatient care	135

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	124
Female	108

**Ethnicity**
Non-Hispanic White	116
Black	0
Hispanic	0
Asian	64
Other	0
Native American	0

**Age**
From 65 to 74	48
From 75 to 84	106
85 and over	48
Less than 65	30

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2015

Hypertension	75
High Cholesterol	63
Stroke	53
Ischemic Heart Disease	48
Depression	29
Chronic Kidney Disease	45
Asthma	10
Osteoperosis	21
Atrial Fibrilation	24
Heart Failure	29
Chronic Obstructive Pulmonary Disease	20
Diabetes	47
Dementia	33
Cancer	15

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2016 were hospital care, inpatient care and cranial surgery.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

cranial surgery	22
doctor visit	125
hospital care	242
inpatient care	242

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	79
Female	77

**Ethnicity**
Non-Hispanic White	87
Black	0
Hispanic	0
Asian	38
Other	0
Native American	0

**Age**
From 65 to 74	41
From 75 to 84	55
85 and over	43
Less than 65	17

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2016

Hypertension	75
High Cholesterol	61
Stroke	44
Ischemic Heart Disease	53
Depression	39
Chronic Kidney Disease	51
Asthma	22
Osteoperosis	17
Atrial Fibrilation	23
Heart Failure	36
Chronic Obstructive Pulmonary Disease	22
Diabetes	42
Dementia	44
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2017 were hospital care, inpatient care and cranial surgery.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

cranial surgery	15
doctor visit	181
hospital care	152
inpatient care	152

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	86
Female	77

**Ethnicity**
Non-Hispanic White	73
Black	0
Hispanic	30
Asian	49
Other	0
Native American	0

**Age**
From 65 to 74	39
From 75 to 84	69
85 and over	35
Less than 65	20

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2017

Hypertension	75
High Cholesterol	61
Stroke	42
Ischemic Heart Disease	47
Depression	34
Chronic Kidney Disease	55
Asthma	0
Osteoperosis	17
Atrial Fibrilation	20
Heart Failure	29
Chronic Obstructive Pulmonary Disease	14
Diabetes	47
Dementia	44
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

doctor visit	194
hospital care	83
inpatient care	83

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	77
Female	79

**Ethnicity**
Non-Hispanic White	78
Black	0
Hispanic	0
Asian	47
Other	0
Native American	0

**Age**
From 65 to 74	53
From 75 to 84	55
85 and over	27
Less than 65	21

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2018

Hypertension	75
High Cholesterol	65
Stroke	32
Ischemic Heart Disease	44
Depression	40
Chronic Kidney Disease	44
Asthma	7
Osteoperosis	22
Atrial Fibrilation	15
Heart Failure	26
Chronic Obstructive Pulmonary Disease	16
Diabetes	44
Dementia	39
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2019 were hospital care, inpatient care and cranial surgery.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

cranial surgery	12
doctor visit	205
hospital care	129
inpatient care	129

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	88
Female	69

**Ethnicity**
Non-Hispanic White	85
Black	0
Hispanic	0
Asian	38
Other	0
Native American	0

**Age**
From 65 to 74	43
From 75 to 84	57
85 and over	37
Less than 65	20

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2019

Hypertension	75
High Cholesterol	71
Stroke	31
Ischemic Heart Disease	41
Depression	38
Chronic Kidney Disease	45
Asthma	0
Osteoperosis	18
Atrial Fibrilation	22
Heart Failure	29
Chronic Obstructive Pulmonary Disease	14
Diabetes	44
Dementia	39
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2020 were hospital care and inpatient care.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

doctor visit	143
hospital care	122
inpatient care	122

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	90
Female	58

**Ethnicity**
Non-Hispanic White	83
Black	0
Hispanic	0
Asian	39
Other	0
Native American	0

**Age**
From 65 to 74	38
From 75 to 84	65
85 and over	24
Less than 65	21

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2020

Hypertension	75
High Cholesterol	68
Stroke	31
Ischemic Heart Disease	53
Depression	32
Chronic Kidney Disease	49
Asthma	9
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	30
Chronic Obstructive Pulmonary Disease	18
Diabetes	40
Dementia	36
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2021 were hospital care, inpatient care and cerebrospinal fluid (CSF) shunt insertion.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

cerebrospinal fluid (CSF) shunt insertion	14
doctor visit	223
hospital care	122
inpatient care	122

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	105
Female	73

**Ethnicity**
Non-Hispanic White	106
Black	0
Hispanic	0
Asian	41
Other	0
Native American	0

**Age**
From 65 to 74	40
From 75 to 84	84
85 and over	33
Less than 65	21

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2021

Hypertension	75
High Cholesterol	72
Stroke	27
Ischemic Heart Disease	51
Depression	37
Chronic Kidney Disease	47
Asthma	11
Osteoperosis	15
Atrial Fibrilation	15
Heart Failure	29
Chronic Obstructive Pulmonary Disease	15
Diabetes	39
Dementia	42
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA during 2022 were hospital care, inpatient care and cerebrospinal fluid (CSF) shunt insertion.

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

cerebrospinal fluid (CSF) shunt insertion	21
doctor visit	292
hospital care	170
inpatient care	170

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	116
Female	72

**Ethnicity**
Non-Hispanic White	103
Black	0
Hispanic	0
Asian	51
Other	0
Native American	0

**Age**
From 65 to 74	46
From 75 to 84	85
85 and over	32
Less than 65	25

Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	47
Ischemic Heart Disease	36
Depression	35
Chronic Kidney Disease	41
Asthma	15
Osteoperosis	19
Atrial Fibrilation	26
Heart Failure	21
Chronic Obstructive Pulmonary Disease	19
Diabetes	40
Dementia	34
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Jefferson William Chen, PhD, MD for Medicare patients.

The highest averages for the top procedures that Dr. Jefferson William Chen, PhD, MD treated as a neurosurgeon in Orange, CA were hospital care, inpatient care and cranial surgery.

cranial surgery	16
doctor visit	147
hospital care	152
inpatient care	152

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Jefferson William Chen, PhD, MD.

**Gender**
Male	78
Female	64

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	35
Non-Hispanic White	72
Native American / Alaskan Native	0
Hispanic	2
Other	0

**Age**
75 to 84	58
85 and over	28
Less than 65	19
65 to 74	38

Average of Total of Conditions of Medicare patients treated by Dr. Jefferson William Chen, PhD, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Jefferson William Chen, PhD, MD treated were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension	66
High Cholesterol	57
Stroke	32
Ischemic Heart Disease	40
Depression	32
Chronic Kidney Disease	39
Asthma	8
Osteoporosis	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	15
Diabetes	36
Atrial Fibrillation	17
Dementia	33
Cancer	13

Education & Training

Dr. Jefferson William Chen, PhD, MD graduated from Johns Hopkins University School of Medicine. He completed residency at University of California, San Diego (UCSD) Affiliated Hospitals. He is certified by the American Board of Neurological Surgery - Neurological Surgery and has a state license in Oregon.

Medical School: Johns Hopkins University School of Medicine

Residency: University of California, San Diego (UCSD) Affiliated Hospitals

Board Certification: American Board of Neurological Surgery - Neurological Surgery

Licensed In: Oregon

Affiliations & Hospitals

Dr. Jefferson William Chen, PhD, MD is associated with these hospitals and organizations:

UCI Health

Ratings & Reviews

Dr. Jefferson William Chen, PhD, MD has an exceptional overall rating with an average of 4.8 out of 5 stars based on 244 ratings. We collect ratings and reviews of Dr. Jefferson William Chen, PhD, MD from all over the web to help you find the right in Orange, CA.

4.8

Overall Rating

(244 Ratings)

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General Payments

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

**Payments by Company**
Longeviti Neuro Solutions LLC	$12,500 ClearFit $12,500
NICO Corporation	$2,892 $2,892
IRRAS USA, Inc.	$1,400 IRRAflow $1,400
Penumbra, Inc.	$341 Ruby $272	Apollo $70
Medical Device Business Services, Inc.	$259 $259
Other	$530 VITOM 90 DETACHABLE, AUTOCLAVE $150	ACTIVA $115	Neuro-Monitoring Catheters and Equipment $115	Neurosurgery $47	Biosurgicals $34	Other $69

**Types of Payments**
Education	$12,500
Compensation for serving as faculty or as a speaker for a non-accredited and noncertified continuing education program	$2,500
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$1,400
Travel and Lodging	$922
Food and Beverage	$600

Research Payments

Dr. Jefferson William Chen, PhD, MD has received 5 research payments totaling $40,914.

Biography

Dr. Jefferson Chen is a specialist in neurosurgery. The average patient rating for Dr. Chen is 5.0 stars (out of 5). Dr. Chen's clinical interests include cancer, neurosurgery, and skull base surgery. He is a graduate of Johns Hopkins University School of Medicine. He trained at a hospital affiliated with the University of California, San Diego (UCSD) for residency. Dr. Chen has received distinctions including Southern California Super Doctors; Physicians of Excellence, Orange County Medical Association; and Best Doctors in America - Neurological Surgery. He is professionally affiliated with UCI Health.