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Dr. Wayne Marston Clark, MD

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Specializes in: Neurology (Brain & Spinal Cord Disease)

Professional interests include: stroke

3250 S.w. Sam Jackson Park Road 13th Floor
Portland, OR 97239

(503) 494-7225

Dr. Wayne Marston Clark, MD is a neurologist in Portland, OR specializing in neurology (brain & spinal cord disease). Dr. Wayne Marston Clark, MD is affiliated with U.S. Department of Veterans Affairs and OHSU Healthcare.

Office Locations

3250 S.w. Sam Jackson Park Road 13th Floor
Portland, OR 97239

(503) 494-7772

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8495 Crater Lake Highway Va Domiciliary (692)
White City, OR 97503

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Some issues Dr. Wayne Marston Clark, 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.

Noteworthy Medicare Patient Procedures Performed by Dr. Wayne Marston Clark, MD in 2024

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

Top 5%

By Volume:

inpatient hospital care

In 2024, Dr. Wayne Marston Clark, MD performed more inpatient hospital care (for patient admitted to hospital) procedures for Medicare patients than 95% of providers in related specialties within Oregon.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	87
hospital care	431
inpatient care	431

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2013 were hospital care and inpatient care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	118
hospital care	458
inpatient care	458

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	147
Female	129

**Ethnicity**
Non-Hispanic White	254
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	117
From 75 to 84	97
85 and over	32
Less than 65	30

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2013

Hypertension	75
High Cholesterol	68
Stroke	75
Ischemic Heart Disease	46
Depression	31
Chronic Kidney Disease	34
Asthma	11
Osteoperosis	10
Atrial Fibrilation	31
Heart Failure	36
Chronic Obstructive Pulmonary Disease	23
Diabetes	34
Dementia	17
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2014 were hospital care and inpatient care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	83
hospital care	462
inpatient care	462

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	128
Female	100

**Ethnicity**
Non-Hispanic White	207
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	89
From 75 to 84	62
85 and over	41
Less than 65	36

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2014

Hypertension	75
High Cholesterol	68
Stroke	75
Ischemic Heart Disease	49
Depression	38
Chronic Kidney Disease	32
Asthma	12
Osteoperosis	0
Atrial Fibrilation	29
Heart Failure	30
Chronic Obstructive Pulmonary Disease	24
Diabetes	40
Dementia	18
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2015 were hospital care and inpatient care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	74
hospital care	555
inpatient care	555

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	302
Female	244

**Ethnicity**
Non-Hispanic White	498
Black	0
Hispanic	0
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	176
85 and over	82
Less than 65	84

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2015

Hypertension	75
High Cholesterol	61
Stroke	75
Ischemic Heart Disease	44
Depression	32
Chronic Kidney Disease	33
Asthma	16
Osteoperosis	10
Atrial Fibrilation	31
Heart Failure	28
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Dementia	19
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2016 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	96
emergency care	15
hospital care	662
inpatient care	662

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	159
Female	148

**Ethnicity**
Non-Hispanic White	270
Black	0
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	83
85 and over	42
Less than 65	55

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2016

Hypertension	75
High Cholesterol	65
Stroke	75
Ischemic Heart Disease	45
Depression	34
Chronic Kidney Disease	40
Asthma	25
Osteoperosis	7
Atrial Fibrilation	29
Heart Failure	31
Chronic Obstructive Pulmonary Disease	21
Diabetes	37
Dementia	25
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2017 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	100
emergency care	30
hospital care	574
inpatient care	574

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	142
Female	138

**Ethnicity**
Non-Hispanic White	242
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	96
85 and over	32
Less than 65	42

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2017

Hypertension	75
High Cholesterol	58
Stroke	75
Ischemic Heart Disease	46
Depression	32
Chronic Kidney Disease	46
Asthma	7
Osteoperosis	7
Atrial Fibrilation	29
Heart Failure	33
Chronic Obstructive Pulmonary Disease	20
Diabetes	33
Dementia	24
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2018 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	113
emergency care	23
hospital care	465
inpatient care	465

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	154
Female	117

**Ethnicity**
Non-Hispanic White	237
Black	0
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	117
From 75 to 84	93
85 and over	30
Less than 65	31

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2018

Hypertension	75
High Cholesterol	65
Stroke	75
Ischemic Heart Disease	49
Depression	33
Chronic Kidney Disease	41
Asthma	10
Osteoperosis	9
Atrial Fibrilation	31
Heart Failure	31
Chronic Obstructive Pulmonary Disease	23
Diabetes	36
Dementia	26
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2019 were hospital care and inpatient care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	134
hospital care	630
inpatient care	630

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	172
Female	131

**Ethnicity**
Non-Hispanic White	271
Black	0
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	124
From 75 to 84	102
85 and over	40
Less than 65	37

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2019

Hypertension	75
High Cholesterol	70
Stroke	75
Ischemic Heart Disease	50
Depression	34
Chronic Kidney Disease	49
Asthma	7
Osteoperosis	8
Atrial Fibrilation	32
Heart Failure	36
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Dementia	26
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2020 were hospital care and inpatient care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	105
hospital care	467
inpatient care	467

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	120
Female	115

**Ethnicity**
Non-Hispanic White	206
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	109
From 75 to 84	68
85 and over	31
Less than 65	27

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2020

Hypertension	75
High Cholesterol	67
Stroke	75
Ischemic Heart Disease	46
Depression	36
Chronic Kidney Disease	49
Asthma	10
Osteoperosis	9
Atrial Fibrilation	28
Heart Failure	36
Chronic Obstructive Pulmonary Disease	23
Diabetes	40
Dementia	24
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2021 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	114
emergency care	14
hospital care	390
inpatient care	390

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	131
Female	137

**Ethnicity**
Non-Hispanic White	235
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	120
From 75 to 84	82
85 and over	34
Less than 65	32

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2021

Hypertension	75
High Cholesterol	65
Stroke	75
Ischemic Heart Disease	49
Depression	31
Chronic Kidney Disease	53
Asthma	9
Osteoperosis	12
Atrial Fibrilation	21
Heart Failure	30
Chronic Obstructive Pulmonary Disease	16
Diabetes	34
Dementia	25
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2022 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	139
emergency care	23
hospital care	739
inpatient care	739

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	168
Female	156

**Ethnicity**
Non-Hispanic White	288
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	116
85 and over	48
Less than 65	33

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	75
Ischemic Heart Disease	33
Depression	31
Chronic Kidney Disease	33
Asthma	13
Osteoperosis	16
Atrial Fibrilation	39
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	38
Dementia	19
Cancer	11

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2023 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	79
emergency care	31
hospital care	809
inpatient care	809

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	164
Female	148

**Ethnicity**
Non-Hispanic White	280
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	113
From 75 to 84	114
85 and over	58
Less than 65	27

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2023

Hypertension	75
High Cholesterol	74
Stroke	75
Ischemic Heart Disease	39
Depression	30
Chronic Kidney Disease	33
Asthma	9
Osteoperosis	19
Atrial Fibrilation	38
Heart Failure	31
Chronic Obstructive Pulmonary Disease	19
Diabetes	37
Dementia	21
Cancer	13

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR during 2024 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

doctor visit	26
emergency care	16
hospital care	421
inpatient care	421

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Male	93
Female	108

**Ethnicity**
Non-Hispanic White	179
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	70
From 75 to 84	81
85 and over	35
Less than 65	15

Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	75
Ischemic Heart Disease	42
Depression	29
Chronic Kidney Disease	31
Asthma	13
Osteoperosis	19
Atrial Fibrilation	36
Heart Failure	33
Chronic Obstructive Pulmonary Disease	20
Diabetes	32
Dementia	22
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Wayne Marston Clark, MD for Medicare patients.

The highest averages for the top procedures that Dr. Wayne Marston Clark, MD treated as a neurologist in Portland, OR were hospital care, inpatient care and emergency care.

doctor visit	97
emergency care	21
hospital care	543
inpatient care	543

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Wayne Marston Clark, MD.

**Gender**
Female	128
Male	144

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	1
Non-Hispanic White	243
Hispanic	7
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	38
75 to 84	90
Less than 65	34
65 to 74	109

Average of Total of Conditions of Medicare patients treated by Dr. Wayne Marston Clark, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Wayne Marston Clark, MD treated were hypertension, stroke, high cholesterol and ischemic heart disease.

Hypertension	69
High Cholesterol	62
Stroke	69
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	36
Asthma	10
Osteoporosis	9
Heart Failure	29
Chronic Obstructive Pulmonary Disease	19
Diabetes	33
Atrial Fibrillation	28
Dementia	20
Cancer	11

Education & Training

He completed residency at University of California, San Diego (UCSD) Affiliated Hospitals. He has a state license in Oregon.

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

Licensed In: Oregon

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General Payments

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

**Payments by Company**
Stryker Corporation	$94 Neuroform EZ $94
AstraZeneca Pharmaceuticals LP	$28 $28

**Types of Payments**
Food and Beverage	$121

Research Payments

Dr. Wayne Marston Clark, MD has received 808 research payments totaling $1,395,356.

Biography

Dr. Wayne Clark is a physician who specializes in neurology (brain & spinal cord disease). Dr. Clark's clinical interests encompass stroke. He is affiliated with OHSU Healthcare and U.S. Department of Veterans Affairs. He trained at a hospital affiliated with the University of California, San Diego (UCSD) for his residency.