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Dr. John Francis Zambetti, MD

(No ratings)

Specializes in: Emergency Medicine
43839 15th Street W
Lancaster, CA 93534

Dr. John Francis Zambetti, MD is an emergency medicine doctor in Lancaster, CA specializing in emergency medicine.

View Doctor's Full Profile (661) 945-5984

Office Locations

43839 15th Street W
Lancaster, CA 93534
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In The News 

“Two years ago, she met emergency room doctor and musician John Zambetti, whom she called "amazingly brilliant."”—"Jane Seymour declares '70 is the new 50' after finding love again following four marriages", Fox News, November 2025
“When John Zambetti isn't racing around Lancaster Community Hospital as an emergency-room doctor, his hands are running up and down the frets as guitarist and vocalist with Malibooz, one of the...”—"SINGER SEEKS A SURFER GRAMMY", South Florida Sun-Sentinel, July 2002
“"I'm filling out the paperwork," says John Zambetti, a voting member of the Grammy-bestowing recording academy.”—"Hoping to Catch That Wave", Los Angeles Times, April 2002

Noteworthy Medicare Patient Procedures Performed by Dr. John Francis Zambetti, MD in 2023

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

Top 10%

By Affordability:

antigen tests
influenza tests
rapid flu test
rapid strep test
urinalysis

In 2023, Dr. John Francis Zambetti, MD had a list price for antigen tests, influenza tests, rapid flu test, rapid strep test, and urinalysis that was lower than the list prices billed to Medicare by 90% 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.

Top 25%

By Affordability:

blood count tests
breathing treatment
complete blood count

In 2012, Dr. John Francis Zambetti, MD had a list price for blood count tests, breathing treatment, and complete blood count (CBC) 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

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

doctor visit 41

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2013 were lab tests.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

doctor visit 49
lab tests 13

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 19
Female 53
Ethnicity
Non-Hispanic White 45
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 30
From 75 to 84 17
85 and over 12
Less than 65 13

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2013

Hypertension 58
High Cholesterol 54
Stroke 0
Ischemic Heart Disease 31
Depression 19
Chronic Kidney Disease 17
Asthma 17
Osteoperosis 17
Atrial Fibrilation 0
Heart Failure 17
Chronic Obstructive Pulmonary Disease 15
Diabetes 33
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2014 were lab tests, blood draw, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 39
breathing treatment 24
doctor visit 337
lab tests 137
thoracic (chest) imaging 28
X-rays 28

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 112
Female 200
Ethnicity
Non-Hispanic White 208
Black 0
Hispanic 73
Asian 15
Other 0
Native American 0
Age
From 65 to 74 121
From 75 to 84 74
85 and over 69
Less than 65 48

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2014

Hypertension 66
High Cholesterol 53
Stroke 6
Ischemic Heart Disease 37
Depression 26
Chronic Kidney Disease 22
Asthma 11
Osteoperosis 13
Atrial Fibrilation 11
Heart Failure 18
Chronic Obstructive Pulmonary Disease 13
Diabetes 30
Dementia 19
Cancer 10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2015 were lab tests, X-rays, thoracic (chest) imaging and blood draw.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 61
breathing treatment 31
doctor visit 509
lab tests 335
preventive care 12
thoracic (chest) imaging 61
vaccines 12
X-rays 61

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 316
Female 558
Ethnicity
Non-Hispanic White 568
Black 38
Hispanic 222
Asian 24
Other 0
Native American 0
Age
From 65 to 74 384
From 75 to 84 202
85 and over 144
Less than 65 144

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2015

Hypertension 64
High Cholesterol 55
Stroke 4
Ischemic Heart Disease 30
Depression 21
Chronic Kidney Disease 24
Asthma 15
Osteoperosis 11
Atrial Fibrilation 10
Heart Failure 15
Chronic Obstructive Pulmonary Disease 13
Diabetes 28
Dementia 13
Cancer 9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2016 were lab tests, X-rays, thoracic (chest) imaging and blood draw.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 16
breathing treatment 12
diabetes management 14
doctor visit 247
lab tests 108
thoracic (chest) imaging 20
X-rays 20

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 72
Female 151
Ethnicity
Non-Hispanic White 130
Black 0
Hispanic 64
Asian 15
Other 0
Native American 0
Age
From 65 to 74 93
From 75 to 84 53
85 and over 36
Less than 65 41

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2016

Hypertension 63
High Cholesterol 54
Stroke 6
Ischemic Heart Disease 31
Depression 23
Chronic Kidney Disease 29
Asthma 22
Osteoperosis 12
Atrial Fibrilation 8
Heart Failure 17
Chronic Obstructive Pulmonary Disease 19
Diabetes 30
Dementia 13
Cancer 13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2017 were lab tests, X-rays, thoracic (chest) imaging and breathing treatment.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 13
breathing treatment 13
diabetes management 11
doctor visit 160
lab tests 84
thoracic (chest) imaging 13
X-rays 13

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 47
Female 110
Ethnicity
Non-Hispanic White 89
Black 0
Hispanic 49
Asian 0
Other 0
Native American 0
Age
From 65 to 74 53
From 75 to 84 49
85 and over 22
Less than 65 33

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2017

Hypertension 66
High Cholesterol 53
Stroke 0
Ischemic Heart Disease 31
Depression 24
Chronic Kidney Disease 33
Asthma 0
Osteoperosis 11
Atrial Fibrilation 10
Heart Failure 15
Chronic Obstructive Pulmonary Disease 14
Diabetes 39
Dementia 13
Cancer 13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2018 were lab tests, breathing treatment and blood draw.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 13
breathing treatment 16
doctor visit 138
lab tests 55

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 42
Female 133
Ethnicity
Non-Hispanic White 91
Black 0
Hispanic 51
Asian 19
Other 0
Native American 0
Age
From 65 to 74 65
From 75 to 84 49
85 and over 29
Less than 65 32

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2018

Hypertension 67
High Cholesterol 57
Stroke 0
Ischemic Heart Disease 36
Depression 22
Chronic Kidney Disease 28
Asthma 17
Osteoperosis 13
Atrial Fibrilation 11
Heart Failure 15
Chronic Obstructive Pulmonary Disease 11
Diabetes 35
Dementia 9
Cancer 9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2019 were lab tests and blood draw.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 19
doctor visit 81
lab tests 60

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 30
Female 84
Ethnicity
Non-Hispanic White 54
Black 0
Hispanic 42
Asian 0
Other 0
Native American 0
Age
From 65 to 74 60
From 75 to 84 28
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2019

Hypertension 70
High Cholesterol 49
Stroke 0
Ischemic Heart Disease 31
Depression 17
Chronic Kidney Disease 28
Asthma 0
Osteoperosis 14
Atrial Fibrilation 11
Heart Failure 18
Chronic Obstructive Pulmonary Disease 10
Diabetes 37
Dementia 14
Cancer 10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2020 were lab tests and blood draw.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 11
doctor visit 90
lab tests 42

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 33
Female 92
Ethnicity
Non-Hispanic White 70
Black 0
Hispanic 37
Asian 0
Other 0
Native American 0
Age
From 65 to 74 54
From 75 to 84 40
85 and over 16
Less than 65 15

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2020

Hypertension 65
High Cholesterol 52
Stroke 0
Ischemic Heart Disease 36
Depression 24
Chronic Kidney Disease 34
Asthma 10
Osteoperosis 13
Atrial Fibrilation 0
Heart Failure 22
Chronic Obstructive Pulmonary Disease 17
Diabetes 36
Dementia 18
Cancer 14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2021 were lab tests.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

doctor visit 137
lab tests 36

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 47
Female 100
Ethnicity
Non-Hispanic White 59
Black 0
Hispanic 64
Asian 12
Other 0
Native American 0
Age
From 65 to 74 70
From 75 to 84 38
85 and over 23
Less than 65 16

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2021

Hypertension 69
High Cholesterol 59
Stroke 0
Ischemic Heart Disease 35
Depression 21
Chronic Kidney Disease 29
Asthma 12
Osteoperosis 13
Atrial Fibrilation 8
Heart Failure 18
Chronic Obstructive Pulmonary Disease 10
Diabetes 44
Dementia 14
Cancer 7

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2022 were lab tests and blood draw.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 20
doctor visit 267
lab tests 85

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 62
Female 174
Ethnicity
Non-Hispanic White 126
Black 0
Hispanic 80
Asian 18
Other 0
Native American 0
Age
From 65 to 74 94
From 75 to 84 71
85 and over 39
Less than 65 32

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2022

Hypertension 75
High Cholesterol 71
Stroke 5
Ischemic Heart Disease 26
Depression 29
Chronic Kidney Disease 21
Asthma 15
Osteoperosis 25
Atrial Fibrilation 12
Heart Failure 15
Chronic Obstructive Pulmonary Disease 15
Diabetes 37
Dementia 8
Cancer 10

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA during 2023 were lab tests, blood draw and breathing treatment.

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

blood draw 17
breathing treatment 15
doctor visit 295
lab tests 91

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 87
Female 187
Ethnicity
Non-Hispanic White 123
Black 0
Hispanic 107
Asian 27
Other 0
Native American 0
Age
From 65 to 74 125
From 75 to 84 77
85 and over 39
Less than 65 33

Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD in 2023

Hypertension 74
High Cholesterol 74
Stroke 12
Ischemic Heart Disease 27
Depression 24
Chronic Kidney Disease 23
Asthma 13
Osteoperosis 22
Atrial Fibrilation 13
Heart Failure 19
Chronic Obstructive Pulmonary Disease 18
Diabetes 41
Dementia 8
Cancer 14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. John Francis Zambetti, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Francis Zambetti, MD treated as an emergency medicine doctor in Lancaster, CA were lab tests, X-rays, thoracic (chest) imaging and blood draw.

blood draw 23
diabetes management 12
doctor visit 195
lab tests 95
preventive care 12
thoracic (chest) imaging 30
vaccines 12
X-rays 30

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. John Francis Zambetti, MD.

Gender
Male 72
Female 153
Ethnicity
Black / African American 3
Asian / Pacific Islander 10
Non-Hispanic White 130
Hispanic 65
Native American / Alaskan Native 0
Other 0
Age
75 to 84 58
85 and over 35
Less than 65 33
65 to 74 95

Average of Total of Conditions of Medicare patients treated by Dr. John Francis Zambetti, MD From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. John Francis Zambetti, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension 61
High Cholesterol 52
Stroke 2
Ischemic Heart Disease 29
Depression 20
Chronic Kidney Disease 24
Asthma 11
Osteoporosis 13
Heart Failure 15
Chronic Obstructive Pulmonary Disease 12
Diabetes 32
Atrial Fibrillation 7
Cancer 9
Dementia 10

Education & Training

He has a state license in California.

Licensed In: California

Ratings & Reviews

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Biography

Dr. John Zambetti, who practices in Lancaster, CA, is a medical specialist in emergency medicine. Dr. Zambetti has obtained a license to practice in California.

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