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Dr. Peter Jun, MD

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Specializes in: Diagnostic Radiology

Stanford University School of Medicine

Professional interests include: hepatocellular carcinoma (HCC), trauma, ultrasound (sonogram), and more.

701 E El Camino Real
Mountain View, CA 94040

(650) 934-7700

Dr. Peter Jun, MD is a diagnostic radiologist in Santa Cruz, CA specializing in diagnostic radiology. He graduated from Stanford University School of Medicine. Dr. Peter Jun, MD is affiliated with Palo Alto Foundation Medical Group, Sutter Health and SUTTER BAY MEDICAL FOUNDATION.

Office Locations

Address:

2025 Soquel Avenue
Santa Cruz, CA 95062

Address:

701 E El Camino Real
Mountain View, CA 94040

Some issues Dr. Peter Jun, MD can help you with:

Joint Injections

A joint is any area of the body where two bones connect. Due to injury or disease, the space between the two bones can sometimes become swollen and inflamed, which leads to pain and a loss of mobility. Injection and aspiration are two tools that physicians use to treat joint pain locally without needing to perform surgery.

Both injection and aspiration are techniques that involve inserting a needle connected to a syringe directly into the joint. Aspiration involves the removal of excess fluid, and injection is the placement of medication directly into the joint space via the needle. Both procedures may be performed at the same time. In both cases a local anesthetic may be used, the skin will be cleaned and disinfected, and then the needle will be inserted. In some cases, especially if the injection or aspiration is in a large and deep joint such as the hip or spine, ultrasound may be used to guide the needle to the exact location desired.

In some cases, irritation to the joint can cause fluid to build up so significantly that the joint hurts and can no longer move well. Aspiration removes some of the excess fluid and relieves the pressure. In addition, aspiration can be used to provide a sample of joint fluid if it needs to be examined microscopically for the presence of white blood cells, bacteria, or crystal formations.

Certain injuries and diseases that affect joints are inflammatory in nature, such as rheumatoid arthritis, tendonitis or gout. These diseases may be helped by the local injection of anti-inflammatory medications directly into the affected joint. In this case, corticosteroids such as methylprednisone are usually used. Relief from the pain may be felt right away and may last for weeks or even months.

In some cases, such as with osteoarthritis, the cartilage buffer between the two bones wears down and pain comes from bones rubbing against each other. In this case, injection of a lubricating agent such as hyaluronic acid may be beneficial. It provides a slippery cushion between the bones to relieve pain that can last for months.

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.

brain imaging (neuroimaging)	32
CT scan	32
thoracic (chest) imaging	28
X-rays	27

**Gender**
Male	39
Female	61

**Ethnicity**
Non-Hispanic White	45
Black	0
Hispanic	19
Asian	23
Other	0
Native American	0

**Age**
From 65 to 74	38
From 75 to 84	25
85 and over	11
Less than 65	26

Hypertension	71
High Cholesterol	55
Stroke	18
Ischemic Heart Disease	38
Depression	28
Chronic Kidney Disease	39
Asthma	12
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	32
Chronic Obstructive Pulmonary Disease	15
Diabetes	43
Dementia	19
Cancer	12

brain imaging (neuroimaging)	19
CT scan	19
thoracic (chest) imaging	18
X-rays	17

**Gender**
Male	34
Female	52

**Ethnicity**
Non-Hispanic White	39
Black	0
Hispanic	18
Asian	18
Other	0
Native American	0

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

Hypertension	71
High Cholesterol	59
Stroke	21
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	34
Asthma	13
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	35
Chronic Obstructive Pulmonary Disease	21
Diabetes	47
Dementia	24
Cancer	0

brain imaging (neuroimaging)	15
CT scan	15
thoracic (chest) imaging	32
X-rays	31

**Gender**
Male	70
Female	102

**Ethnicity**
Non-Hispanic White	66
Black	0
Hispanic	34
Asian	46
Other	0
Native American	0

**Age**
From 65 to 74	78
From 75 to 84	32
85 and over	24
Less than 65	38

Hypertension	65
High Cholesterol	53
Stroke	14
Ischemic Heart Disease	48
Depression	28
Chronic Kidney Disease	53
Asthma	17
Osteoperosis	0
Atrial Fibrilation	17
Heart Failure	37
Chronic Obstructive Pulmonary Disease	21
Diabetes	53
Dementia	23
Cancer	0

brain imaging (neuroimaging)	9
CT scan	9
thoracic (chest) imaging	17
X-rays	16

**Gender**
Male	29
Female	37

**Ethnicity**
Non-Hispanic White	27
Black	0
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	19
From 75 to 84	16
85 and over	14
Less than 65	17

Hypertension	74
High Cholesterol	52
Stroke	20
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	44
Asthma	18
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	33
Chronic Obstructive Pulmonary Disease	18
Diabetes	45
Dementia	0
Cancer	0

brain imaging (neuroimaging)	11
CT scan	11
thoracic (chest) imaging	26
X-rays	25

**Gender**
Male	33
Female	60

**Ethnicity**
Non-Hispanic White	45
Black	0
Hispanic	20
Asian	15
Other	0
Native American	0

**Age**
From 65 to 74	32
From 75 to 84	22
85 and over	11
Less than 65	28

Hypertension	74
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	39
Depression	29
Chronic Kidney Disease	38
Asthma	13
Osteoperosis	13
Atrial Fibrilation	0
Heart Failure	31
Chronic Obstructive Pulmonary Disease	19
Diabetes	34
Dementia	23
Cancer	16

**Gender**
Male	30
Female	47

**Ethnicity**
Non-Hispanic White	29
Black	0
Hispanic	19
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	28
From 75 to 84	0
85 and over	0
Less than 65	29

Hypertension	64
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	48
Depression	36
Chronic Kidney Disease	47
Asthma	16
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	39
Chronic Obstructive Pulmonary Disease	17
Diabetes	42
Dementia	25
Cancer	16

breast procedures	21
preventive care	21
women's imaging	21
X-rays	20

**Gender**
Male	32
Female	50

**Ethnicity**
Non-Hispanic White	30
Black	0
Hispanic	18
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	33
From 75 to 84	18
85 and over	14
Less than 65	17

Hypertension	75
High Cholesterol	54
Stroke	16
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	46
Asthma	13
Osteoperosis	0
Atrial Fibrilation	18
Heart Failure	38
Chronic Obstructive Pulmonary Disease	22
Diabetes	41
Dementia	24
Cancer	0

**Gender**
Male	17
Female	13

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

Hypertension	57
High Cholesterol	37
Stroke	0
Ischemic Heart Disease	47
Depression	0
Chronic Kidney Disease	47
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

brain imaging (neuroimaging)	13
CT scan	13

**Gender**
Male	30
Female	46

**Ethnicity**
Non-Hispanic White	33
Black	0
Hispanic	0
Asian	21
Other	0
Native American	0

**Age**
From 65 to 74	32
From 75 to 84	18
85 and over	0
Less than 65	0

Hypertension	72
High Cholesterol	61
Stroke	14
Ischemic Heart Disease	58
Depression	30
Chronic Kidney Disease	47
Asthma	0
Osteoperosis	0
Atrial Fibrilation	17
Heart Failure	39
Chronic Obstructive Pulmonary Disease	21
Diabetes	38
Dementia	21
Cancer	0

**Gender**
Male	41
Female	61

**Ethnicity**
Non-Hispanic White	33
Black	0
Hispanic	24
Asian	27
Other	0
Native American	0

**Age**
From 65 to 74	41
From 75 to 84	18
85 and over	12
Less than 65	31

Hypertension	61
High Cholesterol	47
Stroke	25
Ischemic Heart Disease	25
Depression	27
Chronic Kidney Disease	27
Asthma	14
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	25
Chronic Obstructive Pulmonary Disease	12
Diabetes	38
Dementia	19
Cancer	0

Average Medicare Procedure Volume From 2013 - 2022

Volume of procedures performed by Dr. Peter Jun, MD for Medicare patients.

The highest averages for the top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA were thoracic (chest) imaging, X-rays, breast procedures and preventive care.

abdominal imaging	10
brain imaging (neuroimaging)	16
breast procedures	22
CT scan	16
MRI (magnetic resonance imaging)	10
pelvic imaging	10
preventive care	22
thoracic (chest) imaging	24
women's imaging	22
X-rays	23

Average Medicare Patient Data From 2013 - 2022

Information about Medicare patients treated by Dr. Peter Jun, MD.

**Gender**
Male	35
Female	52

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	18
Non-Hispanic White	36
Hispanic	16
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	14
85 and over	8
Less than 65	21
65 to 74	33

Average of Total of Conditions of Medicare patients treated by Dr. Peter Jun, MD From 2013 - 2022

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

Hypertension	68
High Cholesterol	51
Stroke	12
Ischemic Heart Disease	42
Depression	26
Chronic Kidney Disease	42
Asthma	11
Osteoporosis	1
Heart Failure	30
Chronic Obstructive Pulmonary Disease	16
Diabetes	38
Atrial Fibrillation	7
Dementia	17
Cancer	4

Education & Training

Dr. Peter Jun, MD graduated from Stanford University School of Medicine. He completed residency at University of California, San Francisco (UCSF) Affiliated Hospitals. He is certified by the Board Certification: Radiology and has a state license in California.

Medical School: Stanford University School of Medicine

Residency: University of California, San Francisco (UCSF) Affiliated Hospitals

Board Certification: Board Certification: Radiology

Licensed In: California

Affiliations & Hospitals

Dr. Peter Jun, MD is associated with these hospitals and organizations:

Palo Alto Foundation Medical Group

Sutter Health

SUTTER BAY MEDICAL FOUNDATION

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. Peter Jun, MD appears to accept the following insurance providers: TRICARE, Private Healthcare Systems (PHCS), Cigna, Anthem Blue Cross of California, Blue Shield of California, MultiPlan, WellCare, Medicare Advantage, United Healthcare, Alliance PPO, HealthSmart, Accepted Sutter Health Plus Plans: Individual and Family Plan HMO: Large and Small Group HMO, Accepted Aetna Plans: Aetna Choice POS II: Aetna Open Access Elect Choice EPO: Aetna Premier Care Network (APCN): Aetna Premier Care Network (APCN) Plus: Aetna Select EPO: Aetna Select Open Access:..., Accepted Chinese Community Health Plan Plans: Active Choice- PPO Silver: Amber 50 HMO Silver: American Indian/Alaskan Native (Covered CA for Individual & Families): Bronze 60 HDHP HMO (including... and Accepted Valley Health Plan Plans: Classic Commercial HMO Plan only.

Insurance Accepted by Provider includes:

According to our sources, Dr. Peter Jun, MD accepts the following insurance providers:

TRICARE

Private Healthcare Systems (PHCS)

Cigna

Anthem Blue Cross of California

Blue Shield of California

MultiPlan

WellCare

Medicare Advantage

United Healthcare

Alliance PPO

HealthSmart

Accepted Sutter Health Plus Plans: Individual and Family Plan HMO: Large and Small Group HMO

Accepted Aetna Plans: Aetna Choice POS II: Aetna Open Access Elect Choice EPO: Aetna Premier Care Network (APCN): Aetna Premier Care Network (APCN) Plus: Aetna Select EPO: Aetna Select Open Access:...

Accepted Chinese Community Health Plan Plans: Active Choice- PPO Silver: Amber 50 HMO Silver: American Indian/Alaskan Native (Covered CA for Individual & Families): Bronze 60 HDHP HMO (including...

Accepted Valley Health Plan Plans: Classic Commercial HMO Plan only

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Biography

Dr. Peter Jun is a specialist in diagnostic radiology in Mountain View, CA and Santa Cruz, CA. He is conversant in Korean. Dr. Jun's clinical interests include hysterosalpingography, transvaginal ultrasound, and image-guided breast biopsy. He is professionally affiliated with Palo Alto Foundation Medical Group. Before performing his residency at a hospital affiliated with the University of California, San Francisco (UCSF), Dr. Jun attended Stanford University School of Medicine. He usually is in-network for Anthem, Blue California, and HealthSmart, as well as other insurance carriers.

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Dr. Peter Jun, MD

Office Locations

Some issues Dr. Peter Jun, MD can help you with:

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Peter Jun, MD in 2022

Average Medicare Procedure Volume From 2013 - 2022

Average Medicare Patient Data From 2013 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Peter Jun, MD From 2013 - 2022

Education & Training

Affiliations & Hospitals

Insurance Information

Ratings & Reviews

Biography

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