i
Loading Page
loading, please wait

Select Year:

Home > CA Providers > Diagnostic Radiologists
placeholder image of provider

Dr. Peter Jun, MD

(No ratings)

Specializes in: Diagnostic Radiology
Stanford University School of Medicine
Professional interests include: hepatocellular carcinoma (HCC), trauma, ultrasound (sonogram), and more.
2025 Soquel Avenue
Santa Cruz, CA 95062

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 Sutter Health.

View Doctor's Full Profile (831) 423-4111

Office Locations

Sutter Health

2025 Soquel Avenue
Santa Cruz, CA 95062
(831) 423-4111
open_in_new
701 E El Camino Real
Mountain View, CA 94040
open_in_new

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.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2012 were spinal procedures, X-rays, CT scan and brain imaging (neuroimaging).

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

abdominal imaging 16
brain imaging (neuroimaging) 263
CT scan 265
MRI (magnetic resonance imaging) 78
neck imaging 11
pelvic imaging 16
spinal procedures 364
thoracic (chest) imaging 42
X-rays 353

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2013 were CT scan, brain imaging (neuroimaging), X-rays and thoracic (chest) imaging.

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

brain imaging (neuroimaging) 34
CT scan 34
thoracic (chest) imaging 29
X-rays 29

2013 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2014 were CT scan, brain imaging (neuroimaging), X-rays and thoracic (chest) imaging.

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

brain imaging (neuroimaging) 21
CT scan 21
thoracic (chest) imaging 19
X-rays 19

2014 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2015 were X-rays, thoracic (chest) imaging, CT scan and brain imaging (neuroimaging).

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

brain imaging (neuroimaging) 17
CT scan 17
thoracic (chest) imaging 33
X-rays 33

2015 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2016 were X-rays, thoracic (chest) imaging, CT scan and brain imaging (neuroimaging).

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

brain imaging (neuroimaging) 11
CT scan 11
thoracic (chest) imaging 18
X-rays 18

2016 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2017 were X-rays, thoracic (chest) imaging, CT scan and brain imaging (neuroimaging).

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

brain imaging (neuroimaging) 13
CT scan 13
thoracic (chest) imaging 27
X-rays 27

2017 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2018 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2019 were breast procedures, X-rays, preventive care and women's imaging.

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

breast procedures 22
preventive care 22
women's imaging 22
X-rays 22

2019 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2020 Medicare Patient Data

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

Gender
Male 17
Female 13
Ethnicity
Non-Hispanic White 17
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0

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

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

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2021 were CT scan and brain imaging (neuroimaging).

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

brain imaging (neuroimaging) 15
CT scan 15

2021 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Peter Jun, MD treated as a diagnostic radiologist in Santa Cruz, CA during 2022 were breast procedures, X-rays, preventive care and women's imaging.

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

abdominal imaging 11
brain imaging (neuroimaging) 11
breast procedures 25
CT scan 11
MRI (magnetic resonance imaging) 11
pelvic imaging 11
preventive care 25
women's imaging 25
X-rays 25

2022 Medicare Patient Data

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

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

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

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

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 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 spinal procedures, X-rays, CT scan and brain imaging (neuroimaging).

abdominal imaging 13
brain imaging (neuroimaging) 48
breast procedures 23
CT scan 48
MRI (magnetic resonance imaging) 44
neck imaging 11
pelvic imaging 13
preventive care 23
spinal procedures 364
thoracic (chest) imaging 28
women's imaging 23
X-rays 65

Average Medicare Patient Data From 2012 - 2022

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

Gender
Male 32
Female 48
Ethnicity
Black / African American 0
Asian / Pacific Islander 17
Non-Hispanic White 33
Hispanic 15
Native American / Alaskan Native 0
Other 0
Age
75 to 84 13
85 and over 7
Less than 65 19
65 to 74 30

Average of Total of Conditions of Medicare patients treated by Dr. Peter Jun, MD From 2012 - 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 62
High Cholesterol 47
Stroke 11
Ischemic Heart Disease 38
Depression 24
Chronic Kidney Disease 38
Asthma 10
Osteoporosis 1
Heart Failure 28
Chronic Obstructive Pulmonary Disease 15
Diabetes 34
Atrial Fibrillation 6
Cancer 4
Dementia 16

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:

Sutter Health

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: Blue Shield of California, Medicare Advantage, HealthSmart, MultiPlan, United Healthcare, TRICARE, Cigna, Alliance PPO, Anthem Blue Cross of California, Private Healthcare Systems (PHCS), Accepted Valley Health Plan Plans: Classic Commercial HMO Plan only, Accepted Central California Alliance for Health Plans: TotalCare (HMO D-SNP), Accepted SCAN Plans: SCAN Compass (HMO), Accepted Santa Clara Family Health Plan Plans: DualConnect (HMO D-SNP), Accepted Provider Networks of America Plans: PPO, Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO, 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 Aetna Plans: Aetna Choice POS II: Aetna Select EPO: Aetna Select Open Access: Aetna Signature Administrators (ASA): Aetna Student Health Program: Health Fund HMO (aka HMO/HRA): Health Fund....

Insurance Accepted by Provider includes:

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

Blue Shield of California
Medicare Advantage
HealthSmart
MultiPlan
United Healthcare
TRICARE
Cigna
Alliance PPO
Anthem Blue Cross of California
Private Healthcare Systems (PHCS)
Accepted Valley Health Plan Plans: Classic Commercial HMO Plan only
Accepted Central California Alliance for Health Plans: TotalCare (HMO D-SNP)
Accepted SCAN Plans: SCAN Compass (HMO)
Accepted Santa Clara Family Health Plan Plans: DualConnect (HMO D-SNP)
Accepted Provider Networks of America Plans: PPO
Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO
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 Aetna Plans: Aetna Choice POS II: Aetna Select EPO: Aetna Select Open Access: Aetna Signature Administrators (ASA): Aetna Student Health Program: Health Fund HMO (aka HMO/HRA): Health Fund...

Ratings & Reviews

Dr. Peter Jun, MD does not have any reviews yet, be the first to leave a review of Dr. Peter Jun, MD here: Leave a Review

(No ratings)

Leave a Review

Biography

Dr. Peter Jun's medical specialty is diagnostic radiology. Clinical interests for Dr. Jun include hepatocellular carcinoma (HCC), breast MRI, and hysterosalpingography. He is affiliated with Sutter Health. Dr. Jun appears to be an in-network provider for Anthem, Blue California, HealthSmart, and more. Dr. Jun graduated from Stanford University School of Medicine. His training includes a residency program at a hospital affiliated with the University of California, San Francisco (UCSF). He is conversant in Korean.

Diagnostic Radiologists in Nearby Locations

Other Providers in Santa Cruz, CA