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Dr. Peter Sungjin Pak, MD

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Specializes in: General Surgery, Trauma Surgery and Critical Care (Intensive Care Medicine)
Albert Einstein College of Medicine of Yeshiva University (2011)
Professional interests include: partial splenectomy, muscle biopsy, laparoscopic splenectomy, and more.
27700 Medical Center Road
Mission Viejo, CA 92691

Dr. Peter Sungjin Pak, MD is a general surgeon in Pomona, CA specializing in general surgery, trauma surgery and critical care (intensive care medicine). He graduated from Albert Einstein College of Medicine of Yeshiva University in 2011 and has 14 years of experience. Dr. Peter Sungjin Pak, MD is affiliated with Providence, Pomona Valley Hospital Medical Center, OC TRAUMA INC and Santa Rosa Memorial Hospital.

View Doctor's Full Profile (949) 364-1400

Office Locations

160 E. Artesia Suite 310
Pomona, CA 91767
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Santa Rosa Memorial Hospital

27700 Medical Center Road
Mission Viejo, CA 92691
(949) 364-1400
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Some issues Dr. Peter Sungjin Pak, 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.

Breast Biopsy

Breast biopsy is a procedure where a small sample of tissue is collected from the breast for testing. A physician may prescribe a breast biopsy for a variety of reasons, but they are most frequently prescribed for a lump found in the breast. Biopsy samples extracted are examined by pathologists in a laboratory setting and are tested to determine if they are cancerous or benign, or indicative of some other condition. Depending on the lab results, physicians may prescribe additional treatment. Other circumstances which may prompt a breast biopsy include:

  • Mammograms that detect other unusual features in the chest, such as a cyst or calcium deposit
  • Breast scans or ultrasounds that display abnormalities
  • Nipple changes, such as scaling, crusting, or bloody discharge

Breast biopsies are collected through several different procedures and the specific type of biopsy that a patient receives depends on the size, location, and features of a breast lump or irregularity. The three main methods of collecting a breast biopsy include:

  • Fine needle aspiration (FNA biopsy), where a thin needle is directed into a breast lump or abnormality, extracting a small sample of tissue or liquid
  • Core needle biopsy (CNB biopsy), where a hollow needle is directed into a breast lump or abnormality, extracting cylinders of tissue called "cores"
  • Open (surgical) biopsy, where a breast lump is removed through an incision in the breast

Fine needle aspiration (FNA) and core needle biopsy (CNB) are sometimes image-guided, where a mammogram, ultrasound, or MRI helps direct the physician performing the needle extraction.

Fine needle aspiration, the most common biopsy method, generally requires few patient preparations. It is recommended patients avoid using lotion, deodorant, and perfume prior to their biopsy procedure. FNA biopsy is performed with local anesthesia (topical numbing cream) and typically has a quick recovery, but patients may experience soreness for a few days. Core needle biopsy extracts slightly more tissue than an FNA biopsy.

Open (surgical) biopsy is more invasive and requires general anesthesia, where patients are put to sleep during the procedure. Patients must fast prior to the surgery. After the biopsy is performed, patients are monitored in a recovery room for a time before being discharged, when they will need someone else to provide transportation.

Although some may consider breast biopsy to be a simple procedure, it can catch critical issues - particularly breast cancer - that impact wellness. If a breast biopsy reveals an underlying condition like life-threatening cancer, patients can receive the diagnosis and medical treatment that is necessary for their long-term health.

Pancreatectomy (Pancreas Removal)

Pancreatectomy is surgery to remove part or all of the pancreas to treat pancreatitis, tumors, or cancer. The pancreas is located behind the stomach and near the small intestine and spleen. There are three sections of the pancreas:

  • The head, which is the portion closest to the intestines
  • The body, which is the middle portion of the pancreas
  • The tail, which is the portion nearest the spleen

Pancreas removal procedures differ based on how much of the pancreas and surrounding organs are removed. There are three types of pancreatectomy:

  • Distal pancreatectomy removes the tail and body of the pancreas. This procedure treats tumors confined to these areas.
  • Pancreaticoduodenectomy, or the Whipple procedure, removes the pancreas, duodenum, bile duct, and, sometimes, part of the stomach. The Whipple procedure is used for pancreatic tumors that have not spread past the head of the pancreas and for other conditions affecting the pancreas, duodenum, and bile duct.
  • Total pancreatectomy removes the whole pancreas along with the duodenum, gallbladder, parts of the stomach and bile duct, surrounding lymph nodes, and, potentially, the spleen. Rarely performed, total pancreatectomy treats conditions that involve the entire pancreas, such as tumors found in multiple sites on the pancreas, or for rare tumors such as intraductal papillary mucinous neoplasms (IPMN).

Pancreatectomy can be done by open or minimally invasive surgery. During a laparoscopic pancreatectomy, the surgeon will use tiny incisions to insert a thin tube with a camera, or laparoscope, into the abdomen. Open surgery, or a laparotomy, is performed through a larger incision on the abdomen. If additional organs are removed, some procedures may require that the small intestine be reconnected to the stomach.

The hospital for pancreatectomy stay may be between 1-3 weeks. Generally, laparoscopic surgeries require shorter recovery periods. Whether patients undergo an open or laparoscopic procedure is determined by factors such as their condition and the extent of their procedure. For example, open surgery tends to be more common for distal pancreatectomies. If patients have difficulty eating, they may require a nasogastric tube, inserted through the nose, to carry food to their stomachs. A catheter can be inserted into the bladder if patients have trouble urinating. Full recovery may take about two months.

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA during 2017 were hospital care, inpatient care, nursing home care and debridement (removal of unhealthy tissue).

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

debridement (removal of unhealthy tissue) 16
doctor visit 79
excision 16
hospital care 41
inpatient care 41
nursing home care 38

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 92
Female 107
Ethnicity
Non-Hispanic White 123
Black 0
Hispanic 35
Asian 15
Other 14
Native American 0
Age
From 65 to 74 66
From 75 to 84 58
85 and over 47
Less than 65 28

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

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2017 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension 75
High Cholesterol 67
Stroke 8
Ischemic Heart Disease 67
Depression 46
Chronic Kidney Disease 56
Asthma 7
Osteoperosis 16
Atrial Fibrilation 19
Heart Failure 43
Chronic Obstructive Pulmonary Disease 27
Diabetes 55
Dementia 38
Cancer 19

Medicare Procedure and Patient Information

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 17
Female 16
Ethnicity
Non-Hispanic White 14
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 15
From 75 to 84 0
85 and over 0
Less than 65 0

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

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2018 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension 73
High Cholesterol 61
Stroke 0
Ischemic Heart Disease 42
Depression 0
Chronic Kidney Disease 39
Asthma 0
Osteoperosis 0
Atrial Fibrilation 0
Heart Failure 0
Chronic Obstructive Pulmonary Disease 0
Diabetes 58
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA during 2019 were hospital care, inpatient care and lab tests.

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

doctor visit 18
hospital care 65
inpatient care 65
lab tests 14

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 48
Female 70
Ethnicity
Non-Hispanic White 64
Black 37
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 43
From 75 to 84 35
85 and over 16
Less than 65 24

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

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2019 were hypertension, ischemic heart disease, chronic kidney disease and high cholesterol.

Hypertension 75
High Cholesterol 58
Stroke 16
Ischemic Heart Disease 67
Depression 38
Chronic Kidney Disease 59
Asthma 11
Osteoperosis 9
Atrial Fibrilation 22
Heart Failure 43
Chronic Obstructive Pulmonary Disease 32
Diabetes 42
Dementia 31
Cancer 14

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA during 2020 were hospital care and inpatient care.

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

doctor visit 12
hospital care 89
inpatient care 89

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 51
Female 63
Ethnicity
Non-Hispanic White 86
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 37
From 75 to 84 24
85 and over 20
Less than 65 33

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

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2020 were hypertension, ischemic heart disease, chronic kidney disease and depression.

Hypertension 75
High Cholesterol 59
Stroke 25
Ischemic Heart Disease 70
Depression 59
Chronic Kidney Disease 63
Asthma 11
Osteoperosis 14
Atrial Fibrilation 29
Heart Failure 49
Chronic Obstructive Pulmonary Disease 35
Diabetes 48
Dementia 48
Cancer 11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA during 2021 were hospital care and inpatient care.

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

hospital care 16
inpatient care 16

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 30
Female 22
Ethnicity
Non-Hispanic White 22
Black 0
Hispanic 15
Asian 0
Other 0
Native American 0
Age
From 65 to 74 18
From 75 to 84 0
85 and over 12
Less than 65 0

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

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2021 were hypertension, chronic kidney disease, high cholesterol and ischemic heart disease.

Hypertension 75
High Cholesterol 56
Stroke 21
Ischemic Heart Disease 46
Depression 27
Chronic Kidney Disease 62
Asthma 0
Osteoperosis 0
Atrial Fibrilation 0
Heart Failure 44
Chronic Obstructive Pulmonary Disease 0
Diabetes 42
Dementia 21
Cancer 0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA during 2022 were hospital care and inpatient care.

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

doctor visit 26
hospital care 51
inpatient care 51

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 47
Female 52
Ethnicity
Non-Hispanic White 54
Black 0
Hispanic 25
Asian 0
Other 0
Native American 0
Age
From 65 to 74 40
From 75 to 84 27
85 and over 17
Less than 65 15

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

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2022 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 75
High Cholesterol 71
Stroke 25
Ischemic Heart Disease 24
Depression 26
Chronic Kidney Disease 33
Asthma 11
Osteoperosis 20
Atrial Fibrilation 21
Heart Failure 22
Chronic Obstructive Pulmonary Disease 23
Diabetes 48
Dementia 17
Cancer 0

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA during 2023 were hospital care and inpatient care.

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

doctor visit 12
hospital care 62
inpatient care 62

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 53
Female 56
Ethnicity
Non-Hispanic White 52
Black 0
Hispanic 30
Asian 16
Other 0
Native American 0
Age
From 65 to 74 39
From 75 to 84 34
85 and over 19
Less than 65 17

Conditions of Medicare patients treated by Dr. Peter Sungjin Pak, MD in 2023

The most common conditions of Medicare patients that Dr. Peter Sungjin Pak, MD treated during 2023 were hypertension, high cholesterol, diabetes and heart failure.

Hypertension 75
High Cholesterol 72
Stroke 35
Ischemic Heart Disease 30
Depression 32
Chronic Kidney Disease 29
Asthma 0
Osteoperosis 18
Atrial Fibrilation 28
Heart Failure 38
Chronic Obstructive Pulmonary Disease 21
Diabetes 43
Dementia 23
Cancer 11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2017 - 2023

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

The highest averages for the top procedures that Dr. Peter Sungjin Pak, MD treated as a general surgeon in Pomona, CA were hospital care, inpatient care, nursing home care and debridement (removal of unhealthy tissue).

debridement (removal of unhealthy tissue) 16
doctor visit 29
excision 16
hospital care 54
inpatient care 54
lab tests 14
nursing home care 38

Average Medicare Patient Data From 2017 - 2023

Information about Medicare patients treated by Dr. Peter Sungjin Pak, MD.

Gender
Male 48
Female 55
Ethnicity
Black / African American 5
Asian / Pacific Islander 4
Non-Hispanic White 59
Native American / Alaskan Native 0
Hispanic 15
Other 2
Age
75 to 84 25
85 and over 18
Less than 65 16
65 to 74 36

Average of Total of Conditions of Medicare patients treated by Dr. Peter Sungjin Pak, MD From 2017 - 2023

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

Hypertension 74
High Cholesterol 63
Stroke 18
Ischemic Heart Disease 49
Depression 32
Chronic Kidney Disease 48
Asthma 5
Osteoporosis 11
Heart Failure 34
Chronic Obstructive Pulmonary Disease 19
Diabetes 48
Atrial Fibrillation 17
Cancer 7
Dementia 25

Education & Training

Dr. Peter Sungjin Pak, MD graduated from Albert Einstein College of Medicine of Yeshiva University in 2011. He completed residency at NYU Langone Medical Center. He is certified by the American Board of Surgery, Surgical Critical Care and has a state license in Maryland.

Medical School: Albert Einstein College of Medicine of Yeshiva University (2011)

Residency: NYU Langone Medical Center (2016)

Board Certification: American Board of Surgery, Surgical Critical Care

Licensed In: Maryland

Affiliations & Hospitals

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

Providence
Pomona Valley Hospital Medical Center
OC TRAUMA INC
Santa Rosa Memorial Hospital

Ratings & Reviews

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General Payments

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

Payments by Company
Intuitive Surgical, Inc. $4,634 DAVINCI XI
$4,000 		Da Vinci Surgical System
$634
W. L. Gore & Associates, Inc. $947 TAG Thoracic Endoprosthesis
$396 		EXCLUDER AAA Endoprosthesis
$314 		SEAMGUARD Bioabsorbable Staple
$237
Medtronic, Inc. $174 Signia
$174
Davol Inc. $163 ARISTA AH FLEXITIP
$163
Aroa Biosurgery Incorporated $75
$75
Other $120 AVYCAZ
$35 		VISTASEAL
$24 		XARELTO
$23 		NORTHERA
$22 		ELIQUIS
$17
Types of Payments
Education $4,000
Food and Beverage $1,659
Travel and Lodging $454

Biography

Dr. Peter Pak is a medical specialist in general surgery, trauma surgery, and critical care (intensive care medicine). These areas are among his clinical interests: laparoscopic gastrostomy, fine needle aspiration (FNA), and pancreatectomy (pancreas removal). He studied medicine at Albert Einstein College of Medicine of Yeshiva University. For his residency, Dr. Pak trained at NYU Langone Medical Center and a hospital affiliated with the University of Southern California (USC). Dr. Pak's professional affiliations include Providence and Pomona Valley Hospital Medical Center.

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