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Dr. Robert Nicolas Keenan, MD

Specializes in: General Surgery
University of Texas Southwestern Medical School
105 W E Street
Tehachapi, CA 93561

Dr. Robert Nicolas Keenan, MD is a general surgeon in Tehachapi, CA specializing in general surgery. He graduated from University of Texas Southwestern Medical School. Dr. Robert Nicolas Keenan, MD is affiliated with Dignity Health.

View Doctor's Full Profile (661) 823-7070

Office Locations

Dignity Health

105 W E Street
Tehachapi, CA 93561
(661) 823-7070
(661) 823-0235
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1374 S Mission Road Suite 408
Fallbrook, CA 92028
(951) 698-4650
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Dignity Health

1700 Mt Vernon Avenue
Bakersfield, CA 93306
(661) 326-2000
(661) 326-2758
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Dignity Health

3551 Q Street Suite 101
Bakersfield, CA 93301
(661) 326-2315
(661) 862-7686
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Noteworthy Medicare Patient Procedures Performed by Dr. Robert Nicolas Keenan, MD in 2023

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

Top 25%

By Affordability:

hospital care
inpatient care
inpatient hospital care

In 2012, Dr. Robert Nicolas Keenan, MD had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) 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. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2012 were hospital care, inpatient care, open surgery and abdominal surgery.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

abdominal surgery 43
doctor visit 239
gastrointestinal procedures 43
hospital care 167
inpatient care 167
open surgery 43

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2013 were hospital care, inpatient care, open surgery and abdominal surgery.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

abdominal surgery 44
doctor visit 226
gastrointestinal procedures 44
hospital care 122
inpatient care 122
open surgery 44

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 128
Female 114
Ethnicity
Non-Hispanic White 200
Black 0
Hispanic 28
Asian 0
Other 0
Native American 0
Age
From 65 to 74 99
From 75 to 84 85
85 and over 40
Less than 65 18

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2013

Hypertension 71
High Cholesterol 56
Stroke 0
Ischemic Heart Disease 36
Depression 20
Chronic Kidney Disease 24
Asthma 8
Osteoperosis 9
Atrial Fibrilation 15
Heart Failure 19
Chronic Obstructive Pulmonary Disease 12
Diabetes 27
Dementia 13
Cancer 21

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2014 were hospital care, inpatient care, open surgery and abdominal surgery.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

abdominal surgery 34
catheterization 15
doctor visit 179
gastrointestinal procedures 34
hospital care 108
inpatient care 108
open surgery 34

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 101
Female 118
Ethnicity
Non-Hispanic White 181
Black 0
Hispanic 24
Asian 0
Other 0
Native American 0
Age
From 65 to 74 90
From 75 to 84 75
85 and over 23
Less than 65 31

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2014

Hypertension 68
High Cholesterol 59
Stroke 5
Ischemic Heart Disease 37
Depression 20
Chronic Kidney Disease 29
Asthma 10
Osteoperosis 8
Atrial Fibrilation 11
Heart Failure 22
Chronic Obstructive Pulmonary Disease 16
Diabetes 28
Dementia 7
Cancer 20

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2015 were hospital care, inpatient care, open surgery and abdominal surgery.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

abdominal surgery 14
doctor visit 139
gastrointestinal procedures 14
hospital care 75
inpatient care 75
open surgery 14

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 176
Female 146
Ethnicity
Non-Hispanic White 264
Black 0
Hispanic 34
Asian 0
Other 0
Native American 0
Age
From 65 to 74 132
From 75 to 84 124
85 and over 30
Less than 65 36

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2015

Hypertension 68
High Cholesterol 50
Stroke 0
Ischemic Heart Disease 34
Depression 17
Chronic Kidney Disease 34
Asthma 10
Osteoperosis 10
Atrial Fibrilation 14
Heart Failure 21
Chronic Obstructive Pulmonary Disease 11
Diabetes 30
Dementia 0
Cancer 22

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2016 were hospital care, inpatient care, open surgery and abdominal surgery.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

abdominal surgery 45
doctor visit 183
gastrointestinal procedures 45
hospital care 99
inpatient care 99
open surgery 45

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 102
Female 96
Ethnicity
Non-Hispanic White 150
Black 11
Hispanic 25
Asian 0
Other 0
Native American 0
Age
From 65 to 74 91
From 75 to 84 68
85 and over 21
Less than 65 18

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2016

Hypertension 74
High Cholesterol 58
Stroke 8
Ischemic Heart Disease 41
Depression 26
Chronic Kidney Disease 37
Asthma 15
Osteoperosis 10
Atrial Fibrilation 13
Heart Failure 21
Chronic Obstructive Pulmonary Disease 14
Diabetes 29
Dementia 11
Cancer 20

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2017 were hospital care, inpatient care, open surgery and abdominal surgery.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

abdominal surgery 18
doctor visit 95
gastrointestinal procedures 18
hospital care 27
inpatient care 27
open surgery 18

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 60
Female 62
Ethnicity
Non-Hispanic White 91
Black 0
Hispanic 18
Asian 0
Other 0
Native American 0
Age
From 65 to 74 63
From 75 to 84 28
85 and over 20
Less than 65 11

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2017

Hypertension 67
High Cholesterol 44
Stroke 9
Ischemic Heart Disease 33
Depression 24
Chronic Kidney Disease 33
Asthma 9
Osteoperosis 0
Atrial Fibrilation 16
Heart Failure 19
Chronic Obstructive Pulmonary Disease 15
Diabetes 32
Dementia 11
Cancer 22

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

doctor visit 97
hospital care 123
inpatient care 123

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 65
Female 68
Ethnicity
Non-Hispanic White 105
Black 0
Hispanic 16
Asian 0
Other 0
Native American 0
Age
From 65 to 74 59
From 75 to 84 42
85 and over 18
Less than 65 14

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2018

Hypertension 71
High Cholesterol 63
Stroke 0
Ischemic Heart Disease 46
Depression 24
Chronic Kidney Disease 41
Asthma 10
Osteoperosis 11
Atrial Fibrilation 17
Heart Failure 26
Chronic Obstructive Pulmonary Disease 17
Diabetes 44
Dementia 12
Cancer 17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2019 were hospital care and inpatient care.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

hospital care 35
inpatient care 35

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 21
Female 19
Age
From 65 to 74 20
From 75 to 84 0
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2019

Hypertension 68
High Cholesterol 55
Stroke 0
Ischemic Heart Disease 35
Depression 0
Chronic Kidney Disease 30
Asthma 0
Osteoperosis 0
Atrial Fibrilation 35
Heart Failure 28
Chronic Obstructive Pulmonary Disease 0
Diabetes 0
Dementia 0
Cancer 28

Medicare Procedure and Patient Information

Medicare Procedure and Patient Information

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 22
Female 13
Ethnicity
Non-Hispanic White 23
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 18
From 75 to 84 0
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2021

Hypertension 75
High Cholesterol 60
Stroke 0
Ischemic Heart Disease 66
Depression 37
Chronic Kidney Disease 54
Asthma 0
Osteoperosis 0
Atrial Fibrilation 31
Heart Failure 40
Chronic Obstructive Pulmonary Disease 0
Diabetes 54
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA during 2022 were hospital care and inpatient care.

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

doctor visit 11
hospital care 360
inpatient care 360

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 138
Female 121
Ethnicity
Non-Hispanic White 208
Black 0
Hispanic 25
Asian 0
Other 0
Native American 0
Age
From 65 to 74 98
From 75 to 84 81
85 and over 51
Less than 65 29

Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD in 2022

Hypertension 75
High Cholesterol 61
Stroke 12
Ischemic Heart Disease 33
Depression 27
Chronic Kidney Disease 30
Asthma 13
Osteoperosis 14
Atrial Fibrilation 31
Heart Failure 28
Chronic Obstructive Pulmonary Disease 26
Diabetes 36
Dementia 20
Cancer 18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Robert Nicolas Keenan, MD for Medicare patients.

The highest averages for the top procedures that Dr. Robert Nicolas Keenan, MD treated as a general surgeon in Tehachapi, CA were hospital care, inpatient care, open surgery and abdominal surgery.

abdominal surgery 33
catheterization 15
doctor visit 146
gastrointestinal procedures 33
hospital care 124
inpatient care 124
open surgery 33

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Robert Nicolas Keenan, MD.

Gender
Male 81
Female 75
Ethnicity
Black / African American 1
Asian / Pacific Islander 0
Non-Hispanic White 122
Native American / Alaskan Native 0
Hispanic 17
Other 0
Age
75 to 84 50
85 and over 20
Less than 65 15
65 to 74 67

Average of Total of Conditions of Medicare patients treated by Dr. Robert Nicolas Keenan, MD From 2012 - 2022

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

Hypertension 63
High Cholesterol 50
Stroke 3
Ischemic Heart Disease 36
Depression 19
Chronic Kidney Disease 31
Asthma 7
Osteoporosis 6
Heart Failure 22
Chronic Obstructive Pulmonary Disease 11
Diabetes 28
Atrial Fibrillation 18
Dementia 7
Cancer 16

Education & Training

Dr. Robert Nicolas Keenan, MD graduated from University of Texas Southwestern Medical School. He completed residency at San Joaquin General Hospital. He is certified by the Surgery General Surgery and has a state license in California.

Medical School: University of Texas Southwestern Medical School

Residency: San Joaquin General Hospital

Board Certification: Surgery General Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Robert Nicolas Keenan, MD is associated with these hospitals and organizations:

Dignity Health

Ratings & Reviews

Dr. Robert Nicolas Keenan, MD has a high overall rating with an average of 4.2 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. Robert Nicolas Keenan, MD from all over the web to help you find the right in Tehachapi, CA. 

4.2
Overall Rating
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General Payments

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

Payments by Company
Siemens Medical Solutions USA, Inc. $15 Coagulation Reagents/Test Kit/Clinical Utilization
$15
Types of Payments
Food and Beverage $15

Biography

Dr. Robert Keenan's specialty is general surgery. Dr. Keenan is professionally affiliated with Dignity Health. He studied medicine at the University of Texas Southwestern Medical School. He trained at San Joaquin General Hospital for his residency. Dr. Keenan is rated 4.0 stars (out of 5) by his patients. According to Dignity Health, he is not acceping new patients at this time.

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