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Dr. Ken Zafren, MD, FAAEM

(No ratings)

Specializes in: Emergency Medicine
University of Washington School of Medicine (1984)
1199 Welch Road Marc and Laura Andreessen Adult Emergency Department
Palo Alto, CA 94304

Dr. Ken Zafren, MD, FAAEM is an emergency medicine doctor in Palo Alto, CA specializing in emergency medicine. He graduated from University of Washington School of Medicine in 1984 and has 42 years of experience. Dr. Ken Zafren, MD, FAAEM is affiliated with Stanford Health Care.

View Doctor's Full Profile (650) 723-5111

Office Locations

Stanford Health Care

1199 Welch Road Marc and Laura Andreessen Adult Emergency Department
Palo Alto, CA 94304
(650) 723-5111
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In The News (see more mentions in the news)

“"The most susceptible parts are fingers, toes, nose, ears and the penis," said Dr. Ken Zafren, an Anchorage emergency physician experienced in wilderness survival techniques.”—"Avoiding the Cold Shoulder", Los Angeles Times, August 2024
“"If all the tissue in your body is ice, or has ice in it, then you're not coming back," said Ken Zafren, a physician and a professor of emergency medicine at Stanford University, who also works in...”—"A 'Corpsicle' Came Back to Life on 'True Detective.' Is That Possible? (Published 2024)", New York Times, January 2024
“Some important essentials to bring are food, water and a charged cellphone, said Dr. Ken Zafren, an emergency medicine professor at Stanford University and an emergency physician at the Alaska...”—"How to Stay Safe if You're Trapped in Your Car During a Snowstorm", New York Times, January 2022

Noteworthy Medicare Patient Procedures Performed by Dr. Ken Zafren, MD, FAAEM in 2023

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

Top 25%

By Affordability:

emergency care
emergency room care

In 2012, Dr. Ken Zafren, MD, FAAEM had a list price for emergency care, and emergency room (ER) care that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2012 were emergency care, outpatient care and hospital care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 208
hospital care 12
outpatient care 12

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2013 were emergency care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 110

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 53
Female 88
Ethnicity
Non-Hispanic White 80
Black 0
Hispanic 0
Asian 22
Other 0
Native American 17
Age
From 65 to 74 44
From 75 to 84 43
85 and over 30
Less than 65 24

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2013

Hypertension 71
High Cholesterol 55
Stroke 14
Ischemic Heart Disease 35
Depression 39
Chronic Kidney Disease 34
Asthma 16
Osteoperosis 13
Atrial Fibrilation 13
Heart Failure 24
Chronic Obstructive Pulmonary Disease 19
Diabetes 32
Dementia 23
Cancer 18

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2014 were emergency care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 116

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 69
Female 82
Ethnicity
Non-Hispanic White 87
Black 0
Hispanic 20
Asian 23
Other 0
Native American 0
Age
From 65 to 74 46
From 75 to 84 40
85 and over 35
Less than 65 30

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2014

Hypertension 75
High Cholesterol 56
Stroke 12
Ischemic Heart Disease 40
Depression 34
Chronic Kidney Disease 46
Asthma 13
Osteoperosis 12
Atrial Fibrilation 21
Heart Failure 32
Chronic Obstructive Pulmonary Disease 17
Diabetes 30
Dementia 19
Cancer 17

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2015 were emergency care, outpatient care and hospital care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 118
hospital care 14
outpatient care 14

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 136
Female 206
Ethnicity
Non-Hispanic White 208
Black 0
Hispanic 40
Asian 56
Other 0
Native American 0
Age
From 65 to 74 108
From 75 to 84 104
85 and over 84
Less than 65 46

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2015

Hypertension 75
High Cholesterol 57
Stroke 9
Ischemic Heart Disease 41
Depression 33
Chronic Kidney Disease 47
Asthma 20
Osteoperosis 15
Atrial Fibrilation 23
Heart Failure 33
Chronic Obstructive Pulmonary Disease 22
Diabetes 33
Dementia 22
Cancer 22

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2016 were emergency care, outpatient care and hospital care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 141
hospital care 13
outpatient care 13

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 88
Female 110
Ethnicity
Non-Hispanic White 123
Black 0
Hispanic 18
Asian 38
Other 0
Native American 0
Age
From 65 to 74 47
From 75 to 84 59
85 and over 61
Less than 65 31

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2016

Hypertension 75
High Cholesterol 56
Stroke 13
Ischemic Heart Disease 44
Depression 35
Chronic Kidney Disease 47
Asthma 21
Osteoperosis 13
Atrial Fibrilation 24
Heart Failure 41
Chronic Obstructive Pulmonary Disease 18
Diabetes 32
Dementia 34
Cancer 21

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2017 were emergency care, outpatient care and hospital care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 139
hospital care 24
outpatient care 24

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 93
Female 116
Ethnicity
Non-Hispanic White 138
Black 0
Hispanic 22
Asian 32
Other 0
Native American 0
Age
From 65 to 74 50
From 75 to 84 72
85 and over 60
Less than 65 27

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2017

Hypertension 75
High Cholesterol 60
Stroke 11
Ischemic Heart Disease 45
Depression 36
Chronic Kidney Disease 57
Asthma 12
Osteoperosis 14
Atrial Fibrilation 23
Heart Failure 35
Chronic Obstructive Pulmonary Disease 17
Diabetes 36
Dementia 30
Cancer 15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2018 were emergency care, outpatient care and hospital care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 89
hospital care 25
outpatient care 25

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 67
Female 89
Ethnicity
Non-Hispanic White 100
Black 17
Hispanic 0
Asian 19
Other 0
Native American 0
Age
From 65 to 74 49
From 75 to 84 49
85 and over 34
Less than 65 24

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2018

Hypertension 75
High Cholesterol 61
Stroke 12
Ischemic Heart Disease 48
Depression 35
Chronic Kidney Disease 51
Asthma 13
Osteoperosis 15
Atrial Fibrilation 21
Heart Failure 39
Chronic Obstructive Pulmonary Disease 18
Diabetes 38
Dementia 34
Cancer 21

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2019 were emergency care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 107

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 72
Female 88
Ethnicity
Non-Hispanic White 97
Black 0
Hispanic 19
Asian 19
Other 0
Native American 0
Age
From 65 to 74 38
From 75 to 84 52
85 and over 39
Less than 65 31

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2019

Hypertension 75
High Cholesterol 64
Stroke 11
Ischemic Heart Disease 57
Depression 38
Chronic Kidney Disease 51
Asthma 12
Osteoperosis 23
Atrial Fibrilation 26
Heart Failure 39
Chronic Obstructive Pulmonary Disease 21
Diabetes 33
Dementia 34
Cancer 13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2020 were emergency care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 33

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 12
Female 28
Ethnicity
Non-Hispanic White 25
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 0
From 75 to 84 18
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2020

Hypertension 75
High Cholesterol 60
Stroke 0
Ischemic Heart Disease 35
Depression 33
Chronic Kidney Disease 53
Asthma 0
Osteoperosis 0
Atrial Fibrilation 0
Heart Failure 30
Chronic Obstructive Pulmonary Disease 0
Diabetes 30
Dementia 30
Cancer 0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2021 were emergency care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 61

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 38
Female 43
Ethnicity
Non-Hispanic White 52
Black 0
Hispanic 0
Asian 17
Other 0
Native American 0
Age
From 65 to 74 25
From 75 to 84 23
85 and over 20
Less than 65 13

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2021

Hypertension 75
High Cholesterol 65
Stroke 0
Ischemic Heart Disease 59
Depression 31
Chronic Kidney Disease 62
Asthma 0
Osteoperosis 23
Atrial Fibrilation 25
Heart Failure 48
Chronic Obstructive Pulmonary Disease 17
Diabetes 41
Dementia 35
Cancer 16

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA during 2022 were emergency care.

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

emergency care 118

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 76
Female 73
Ethnicity
Non-Hispanic White 82
Black 0
Hispanic 19
Asian 26
Other 0
Native American 0
Age
From 65 to 74 54
From 75 to 84 41
85 and over 36
Less than 65 18

Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM in 2022

Hypertension 75
High Cholesterol 73
Stroke 21
Ischemic Heart Disease 44
Depression 26
Chronic Kidney Disease 36
Asthma 19
Osteoperosis 19
Atrial Fibrilation 35
Heart Failure 37
Chronic Obstructive Pulmonary Disease 17
Diabetes 38
Dementia 20
Cancer 22

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Ken Zafren, MD, FAAEM for Medicare patients.

The highest averages for the top procedures that Dr. Ken Zafren, MD, FAAEM treated as an emergency medicine doctor in Palo Alto, CA were emergency care, hospital care and outpatient care.

emergency care 112
hospital care 17
outpatient care 17

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Ken Zafren, MD, FAAEM.

Gender
Male 64
Female 83
Ethnicity
Black / African American 1
Asian / Pacific Islander 22
Non-Hispanic White 90
Native American / Alaskan Native 1
Hispanic 12
Other 0
Age
75 to 84 45
85 and over 36
Less than 65 22
65 to 74 41

Average of Total of Conditions of Medicare patients treated by Dr. Ken Zafren, MD, FAAEM From 2012 - 2022

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

Hypertension 67
High Cholesterol 55
Stroke 9
Ischemic Heart Disease 40
Depression 30
Chronic Kidney Disease 44
Asthma 11
Osteoporosis 13
Heart Failure 32
Chronic Obstructive Pulmonary Disease 15
Diabetes 31
Atrial Fibrillation 19
Dementia 25
Cancer 15

Education & Training

Dr. Ken Zafren, MD, FAAEM graduated from University of Washington School of Medicine in 1984. He completed residency at Kern Medical Center, Bakersfield. He is certified by the American Board of Emergency Medicine, Emergency Medicine and has a state license in Alaska.

Medical School: University of Washington School of Medicine (1984)

Residency: Kern Medical Center, Bakersfield

Board Certification: American Board of Emergency Medicine, Emergency Medicine

Licensed In: Alaska

Affiliations & Hospitals

Dr. Ken Zafren, MD, FAAEM is associated with these hospitals and organizations:

Stanford Health Care

Ratings & Reviews

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General Payments

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

Payments by Company
Bard Access Systems, Inc. $10 Oncology
$10
Types of Payments
Honoraria $10

Biography

Dr. Ken Zafren is a specialist in emergency medicine. He studied medicine at the University of Washington School of Medicine. Dr. Zafren's residency was performed at Kern Medical Center, Bakersfield and a hospital affiliated with the University of California, Los Angeles (UCLA). Awards and/or distinctions he has received include Award for Excellence in Peer Reviews, Wilderness and Environmental Medicine; Award for Outstanding Contribution to Mountain Rescue Medicine, Mountain Rescue Association; and Education Award of the Wilderness Medical Society, Wilderness Medical Society. Dr. Zafren (or staff) speaks Spanish and German. Dr. Zafren is professionally affiliated with Stanford Health Care.

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