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Dr. Ann-Marie Yost, MD

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Specializes in: Neurosurgery and Surgical Oncology (Cancer Surgery)

George Washington University School of Medicine and Health Sciences (1991)

Professional interests include: peripheral nerve surgery, brain surgery, spinal deformity, and more.

9155 Sw Barnes Road Suite 440
Portland, OR 97225

(503) 935-8500

Dr. Ann-Marie Yost, MD is a neurosurgeon in Portland, OR specializing in neurosurgery and surgical oncology (cancer surgery). She graduated from George Washington University School of Medicine and Health Sciences in 1991 and has 35 years of experience. Dr. Ann-Marie Yost, MD is affiliated with Providence, The Oregon Clinic and Providence Medical Group - Oregon.

Office Locations

5050 Northeast Hoyt Street Suite 359
Portland, OR 97213

(503) 935-8501

open_in_new

9155 Sw Barnes Road Suite 440
Portland, OR 97225

(503) 935-8500

(503) 935-8505

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Some issues Dr. Ann-Marie Yost, MD can help you with:

Biopsy

A biopsy is a procedure performed to remove a small sample of cells for testing. The cells are examined in a laboratory to check for disease, or sometimes to see how badly a known disease is affecting them. Biopsy can be performed on any part of the body.

Although biopsy is most often associated with cancer, it can also be used to check for other diseases, such as infections. A biopsy sample can be scraped, cut, collected with a needle, taken with a machine that punches out a tiny piece, or removed with the tiny tools in an endoscope.

In most cases, a biopsy is a simple outpatient procedure. Depending on the procedure, patients may need to stop taking certain medications beforehand, such as blood thinners. It is important for patients to tell doctors if they are pregnant, as certain biopsies require the use of x-rays to guide the needle to the right location. There is usually very little pain associated with a biopsy. Patients will have to wait a few days to hear the results.

Spinal Fusion

Spinal fusion is a surgical procedure to permanently join together two or more vertebrae, the bones in the spine. Certain spinal disorders can lead to instability and pain, and the idea behind spinal fusion is that fusing vertebrae together can both make them stronger and reduce motion, which can sometimes reduce pain.

There are several different types of spinal fusion surgery available, mostly depending on where a patient's pain is located and whether his or her surgeon will perform the procedure through the back, front, or side. In general, a fusion is performed by packing the vertebrae to be fused with grafted bone. This bone may be taken from the patient's hip, may be donated from a cadaver, or it may be a manufactured synthetic material. The bone is placed along the vertebrae, and sometimes, the disc that lies in between the vertebrae is removed and replaced with grafted bone. The bone material will grow and cement the two vertebrae together. After the bone graft is placed, the vertebrae are sometimes held in place with rods, screws, plates, or cages, depending on the weakness of the spine and needs of the graft.

Spinal fusion is a significant surgery and can take three to four hours or more. Recovery is typically two to four days in the hospital. After surgery, it is important to remember that the fusion takes time to grow from the bone graft. So, the actual fusion is not complete for several months. Patients will probably feel somewhat better right away, but it may take a while to feel the full effects of the fusion as the bone grows into place. In the meantime, doctors might have patients wear a brace to protect their spine and keep it properly aligned.

Spinal fusion is not used for all kinds of back pain. Changing the way the spine moves can lead to strain on the other joints in the back, and fusion is only performed when the benefits outweigh the risks. Some spine disorders that are treated with fusion include:

Curvature disorders, such as scoliosis and kyphosis
Degenerative disc disease
Spondylolisthesis, a disorder that causes vertebrae to slip over each other
Significant spinal fractures that cause instability
Weakened spine due to infection or tumor
Some cases of spinal stenosis, a narrowing of the spinal column
Chronic lower back pain (although the use of fusion to treat this is controversial)

Regardless of the diagnosis, there is always a possibility of 'failure' with spinal fusion, or of the surgery not fully solving the pain. This is more likely when fusion is used primarily to treat pain instead of structural problems. Patients can improve their chances of a successful outcome by stopping smoking, maintaining a healthy weight, moving their body every day, and following their doctor's instructions for any physical therapy that they are prescribed.

Spinal Osteotomy

Spinal osteotomy is a surgical procedure used to treat significant spinal deformity, sometimes as part of a spinal reconstruction. During spinal osteotomy, one or more pieces of bone are removed. This creates a curve, allowing for proper realignment of the spine.

There are three major types of spinal osteotomy. In order of amount of bone removed, they are:

Smith-Peterson osteotomy or SPO, which offers a small amount of correction and is often performed on multiple levels of the spine. This procedure is the least invasive, removing a small piece of bone from the back of the vertebra.
Pedicle subtraction osteotomy or PSO, which is often used in the lower back for the treatment of flatback syndrome, a condition in which the lower spine loses its natural curve. A slice or wedge of bone going through the entire vertebral column is removed, allowing more movement for repositioning.
Vertebral column resection or VCR, which is the most involved spinal osteotomy surgery. It is almost always performed as part of a spinal reconstruction. One or more entire vertebrae are removed, and the spine is fused into place with rods or screws.

After surgery, it is common to stay in the hospital for several days. Recovery can be slow, and patients will likely need help doing regular activities for the first few weeks. Lifting objects and bending or twisting, such as when getting out of bed or into a car, will be extremely difficult at first. Physical therapy can help patients heal and move. Most daily activities can be resumed after six weeks, and most patients return to full activity, including playing certain sports, within a year.

Although the recovery from spinal osteotomy can be significant, it can be quite effective at reducing pain. Correcting a spinal deformity can also improve appearance and self-esteem, increase balance, and improve stability when moving.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	34

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2013 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	111
hospital care	11
inpatient care	11

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	45
Female	61

**Ethnicity**
Non-Hispanic White	92
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	39
From 75 to 84	0
85 and over	0
Less than 65	39

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2013

Hypertension	62
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	29
Depression	38
Chronic Kidney Disease	19
Asthma	11
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	14
Chronic Obstructive Pulmonary Disease	19
Diabetes	30
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2014 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	99
hospital care	16
inpatient care	16

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	32
Female	64

**Ethnicity**
Non-Hispanic White	84
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	38
From 75 to 84	26
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2014

Hypertension	66
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	29
Depression	43
Chronic Kidney Disease	22
Asthma	16
Osteoperosis	13
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	21
Diabetes	25
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2015 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	76
hospital care	59
inpatient care	59

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	74
Female	124

**Ethnicity**
Non-Hispanic White	170
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	96
From 75 to 84	0
85 and over	0
Less than 65	48

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2015

Hypertension	74
High Cholesterol	45
Stroke	19
Ischemic Heart Disease	28
Depression	43
Chronic Kidney Disease	28
Asthma	14
Osteoperosis	12
Atrial Fibrilation	0
Heart Failure	20
Chronic Obstructive Pulmonary Disease	15
Diabetes	35
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2016 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	70
hospital care	32
inpatient care	32

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	40
Female	41

**Ethnicity**
Non-Hispanic White	70
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	36
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2016

Hypertension	70
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	20
Depression	32
Chronic Kidney Disease	38
Asthma	19
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	19
Chronic Obstructive Pulmonary Disease	15
Diabetes	31
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2017 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

arthrodesis (bone fusion surgery)	12
decompression surgery	12
doctor visit	82
hospital care	41
inpatient care	41
neck surgery	12
nerve procedures	12
spinal procedures	12

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	47
Female	56

**Ethnicity**
Non-Hispanic White	89
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	51
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2017

Hypertension	72
High Cholesterol	45
Stroke	13
Ischemic Heart Disease	21
Depression	32
Chronic Kidney Disease	35
Asthma	0
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	17
Diabetes	33
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	59
hospital care	33
inpatient care	33

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	38
Female	42

**Age**
From 65 to 74	29
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2018

Hypertension	60
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	24
Depression	34
Chronic Kidney Disease	29
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	19
Diabetes	21
Dementia	0
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	84

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	30
Female	39

**Age**
From 65 to 74	34
From 75 to 84	0
85 and over	0
Less than 65	16

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2019

Hypertension	55
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	25
Depression	32
Chronic Kidney Disease	30
Asthma	19
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	32
Dementia	0
Cancer	17

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR during 2020 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	55
hospital care	18
inpatient care	18

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	39
Female	39

**Ethnicity**
Non-Hispanic White	67
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	45
From 75 to 84	16
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2020

Hypertension	63
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	23
Depression	28
Chronic Kidney Disease	37
Asthma	0
Osteoperosis	0
Atrial Fibrilation	23
Heart Failure	18
Chronic Obstructive Pulmonary Disease	0
Diabetes	38
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	66

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	42
Female	37

**Age**
From 65 to 74	45
From 75 to 84	17
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2021

Hypertension	67
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	22
Depression	34
Chronic Kidney Disease	38
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	46

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	37
Female	44

**Age**
From 65 to 74	40
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2022

Hypertension	75
High Cholesterol	62
Stroke	15
Ischemic Heart Disease	15
Depression	30
Chronic Kidney Disease	27
Asthma	0
Osteoperosis	16
Atrial Fibrilation	21
Heart Failure	16
Chronic Obstructive Pulmonary Disease	0
Diabetes	27
Dementia	0
Cancer	25

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	47

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	20
Female	43

**Age**
From 65 to 74	22
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2023

Hypertension	68
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	0
Depression	35
Chronic Kidney Disease	0
Asthma	17
Osteoperosis	17
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	17
Diabetes	24
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

doctor visit	52

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	20
Female	40

**Age**
From 65 to 74	28
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD in 2024

Hypertension	68
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	18
Depression	42
Chronic Kidney Disease	22
Asthma	0
Osteoperosis	23
Atrial Fibrilation	20
Heart Failure	22
Chronic Obstructive Pulmonary Disease	0
Diabetes	25
Dementia	0
Cancer	22

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Ann-Marie Yost, MD for Medicare patients.

The highest averages for the top procedures that Dr. Ann-Marie Yost, MD treated as a neurosurgeon in Portland, OR were hospital care, inpatient care, nerve procedures and decompression surgery.

arthrodesis (bone fusion surgery)	12
decompression surgery	12
doctor visit	67
hospital care	30
inpatient care	30
neck surgery	12
nerve procedures	12
spinal procedures	12

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Ann-Marie Yost, MD.

**Gender**
Male	35
Female	48

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	44
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	14
85 and over	0
Less than 65	7
65 to 74	38

Average of Total of Conditions of Medicare patients treated by Dr. Ann-Marie Yost, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Ann-Marie Yost, MD treated were hypertension, high cholesterol, depression and diabetes.

Hypertension	61
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	19
Depression	32
Chronic Kidney Disease	25
Asthma	7
Osteoporosis	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	26
Atrial Fibrillation	5
Dementia	0
Cancer	8

Education & Training

Dr. Ann-Marie Yost, MD graduated from George Washington University School of Medicine and Health Sciences in 1991. She completed residency at George Washington University Medical Center. She is certified by the Board Certification: Neurosurgery and has a state license in Oregon.

Medical School: George Washington University School of Medicine and Health Sciences (1991)

Residency: George Washington University Medical Center (1998)

Board Certification: Board Certification: Neurosurgery

Licensed In: Oregon

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Ann-Marie Yost, MD appears to accept the following insurance providers: First Choice Health, TRICARE Prime, TRICARE For Life, CIGNA PPO, CIGNA Open Access Plus, Medicare Advantage, United Healthcare, Medicaid, Blue Cross/Blue Shield, CHAMPVA, United Healthcare PPO, United Healthcare POS, Providence, Regence, US Family Health Plan, Tricare West, Medicare AB, Aetna PROV Employee POS, Tricare Select, Moda Connexus Network, Age Right Marquis Advantage and Samaritan Health Plan Med Advantage.

Insurance Accepted by Provider includes:

According to our sources, Dr. Ann-Marie Yost, MD accepts the following insurance providers:

First Choice Health

TRICARE Prime

TRICARE For Life

CIGNA PPO

CIGNA Open Access Plus

Medicare Advantage

United Healthcare

Medicaid

Blue Cross/Blue Shield

CHAMPVA

United Healthcare PPO

United Healthcare POS

Providence

Regence

US Family Health Plan

Tricare West

Medicare AB

Aetna PROV Employee POS

Tricare Select

Moda Connexus Network

Age Right Marquis Advantage

Samaritan Health Plan Med Advantage

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General Payments

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

**Payments by Company**
Globus Medical, Inc.	$3,365 Excelsius Robotics System $1,766	Spine $739	MARS 3VL Retractor $354	CREO $280	Excelsius GPS $59	Other $167
NUVASIVE, INC.	$1,940 ALIF $900	Pulse $674	Thoracolumbar $105	Integrated Operative Solutions $102	XLIF $72	Other $87
Medtronic USA, Inc.	$1,722 O-ARM-ST $1,061	DIVERGENCE-L $273	MazorX - Renaissance $215	RIALTO $119	PIVOX Oblique Lateral Spinal System $41	Other $13
SI-Bone, Inc.	$337 iFuse Implant $337
Elekta, Inc.	$184 ELEKTA LEKSELL GAMMA KNIFE $184
Other	$721 Spine Fixation $163	STRYKER PERFORMANCE SOLUTIONS $134	Spine $90	I-FACTOR PEPTIDE ENHANCED BONE GRAFT $62	Thoracolumbar - TL Therapies $57	Other $215

**Types of Payments**
Travel and Lodging	$5,540
Food and Beverage	$2,694
Gift	$23
Education	$12

Biography

Dr. Ann-Marie Yost's specialties are neurosurgery and surgical oncology (cancer surgery). She practices in Portland, OR. Clinical interests for Dr. Yost include bypass surgery, kyphoplasty (vertebral augmentation), and spinal AVM. She is professionally affiliated with Providence Portland Medical Center, The Oregon Clinic, and Legacy Emanuel Medical Center. Dr. Yost appears to be in-network for Regence, Blue Cross/Blue Shield, and United Healthcare POS, in addition to other insurance carriers. Her practice in Portland, OR is open to new patients as reported by Providence. Before performing her residency at George Washington University Medical Center, Dr. Yost attended George Washington University School of Medicine and Health Sciences for medical school. She has received professional recognition including the following: “Top Doctors”; Portland Monthly Magazine; and MD awarded with Distinction, George Washington University.