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Dr. Thomas C. O Neil, MD

Accepting New Patients
(Dr. Thomas C. O'Neil, MD)
Specializes in: Ophthalmology (Eye Disease)
University of Iowa, Carver College of Medicine
303 W Eaton Avenue
Tracy, CA 95376

Dr. Thomas C. O Neil, MD is an ophthalmologist in Tracy, CA specializing in ophthalmology (eye disease). He graduated from University of Iowa, Carver College of Medicine. Dr. Thomas C. O Neil, MD is affiliated with Sutter Health and Hill Physicians.

View Doctor's Full Profile (209) 836-1155

Office Locations

303 W Eaton Avenue
Tracy, CA 95376
(209) 836-1155
(209) 836-0478
open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Thomas C. O Neil, MD in 2023

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

Top 5%

By Volume:

conjunctival challenge test

In 2023, Dr. Thomas C. O Neil, MD performed more conjunctival challenge test procedures for Medicare patients than 95% of providers in related specialties within California.

Top 10%

By Affordability:

corneal pachymetry
ophthalmic ultrasound
ultrasound corneal pachymetry

In 2023, Dr. Thomas C. O Neil, MD had a list price for corneal pachymetry (corneal thickness test), ophthalmic ultrasound, and ultrasound corneal pachymetry 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 Volume:

ultrasound corneal pachymetry

By Affordability:

eye tests

In 2012, among providers in related specialties within California, Dr. Thomas C. O Neil, MD performed more ultrasound corneal pachymetry procedures for Medicare patients than 75% of them and he also had a list price for eye tests that was lower than the list prices billed to Medicare by 75% of them. 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. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2012 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 103
doctor visit 378
eye procedures 692
ultrasound (sonogram) 114

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2013 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 57
doctor visit 357
eye procedures 640
ultrasound (sonogram) 85

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 82
Female 133
Ethnicity
Non-Hispanic White 122
Black 0
Hispanic 58
Asian 24
Other 0
Native American 0
Age
From 65 to 74 79
From 75 to 84 72
85 and over 44
Less than 65 20

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2013

Hypertension 75
High Cholesterol 73
Stroke 0
Ischemic Heart Disease 45
Depression 16
Chronic Kidney Disease 29
Asthma 7
Osteoperosis 12
Atrial Fibrilation 6
Heart Failure 15
Chronic Obstructive Pulmonary Disease 13
Diabetes 49
Dementia 10
Cancer 8

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2014 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 77
doctor visit 398
eye procedures 706
ultrasound (sonogram) 90

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 87
Female 127
Ethnicity
Non-Hispanic White 121
Black 0
Hispanic 50
Asian 0
Other 0
Native American 0
Age
From 65 to 74 83
From 75 to 84 76
85 and over 31
Less than 65 24

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2014

Hypertension 75
High Cholesterol 67
Stroke 0
Ischemic Heart Disease 42
Depression 14
Chronic Kidney Disease 28
Asthma 9
Osteoperosis 12
Atrial Fibrilation 6
Heart Failure 15
Chronic Obstructive Pulmonary Disease 9
Diabetes 49
Dementia 10
Cancer 8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2015 were eye procedures, ultrasound (sonogram), allergy testing and capsulotomy.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 27
capsulotomy 13
doctor visit 333
eye procedures 572
laser treatment 13
ultrasound (sonogram) 50

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 160
Female 204
Ethnicity
Non-Hispanic White 206
Black 0
Hispanic 86
Asian 0
Other 0
Native American 0
Age
From 65 to 74 138
From 75 to 84 150
85 and over 52
Less than 65 24

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2015

Hypertension 75
High Cholesterol 72
Stroke 0
Ischemic Heart Disease 38
Depression 18
Chronic Kidney Disease 35
Asthma 11
Osteoperosis 11
Atrial Fibrilation 7
Heart Failure 15
Chronic Obstructive Pulmonary Disease 12
Diabetes 51
Dementia 10
Cancer 12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2016 were eye procedures, ultrasound (sonogram), allergy testing and capsulotomy.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 34
capsulotomy 27
doctor visit 324
eye procedures 477
laser treatment 27
ultrasound (sonogram) 66

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 70
Female 101
Ethnicity
Non-Hispanic White 96
Black 0
Hispanic 42
Asian 0
Other 0
Native American 0
Age
From 65 to 74 66
From 75 to 84 61
85 and over 29
Less than 65 15

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2016

Hypertension 75
High Cholesterol 74
Stroke 0
Ischemic Heart Disease 43
Depression 13
Chronic Kidney Disease 49
Asthma 16
Osteoperosis 19
Atrial Fibrilation 8
Heart Failure 17
Chronic Obstructive Pulmonary Disease 12
Diabetes 55
Dementia 10
Cancer 9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2017 were eye procedures, ultrasound (sonogram), allergy testing and capsulotomy.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 54
capsulotomy 16
doctor visit 338
eye procedures 576
laser treatment 16
ultrasound (sonogram) 100

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 56
Female 117
Ethnicity
Non-Hispanic White 100
Black 0
Hispanic 40
Asian 0
Other 0
Native American 0
Age
From 65 to 74 76
From 75 to 84 60
85 and over 25
Less than 65 12

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2017

Hypertension 75
High Cholesterol 66
Stroke 0
Ischemic Heart Disease 39
Depression 18
Chronic Kidney Disease 50
Asthma 6
Osteoperosis 13
Atrial Fibrilation 7
Heart Failure 12
Chronic Obstructive Pulmonary Disease 12
Diabetes 52
Dementia 11
Cancer 9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2018 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 92
doctor visit 376
eye procedures 645
ultrasound (sonogram) 125

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 76
Female 126
Ethnicity
Non-Hispanic White 110
Black 0
Hispanic 54
Asian 0
Other 0
Native American 0
Age
From 65 to 74 87
From 75 to 84 59
85 and over 36
Less than 65 20

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2018

Hypertension 75
High Cholesterol 69
Stroke 0
Ischemic Heart Disease 39
Depression 17
Chronic Kidney Disease 48
Asthma 9
Osteoperosis 18
Atrial Fibrilation 8
Heart Failure 14
Chronic Obstructive Pulmonary Disease 10
Diabetes 54
Dementia 11
Cancer 7

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2019 were eye procedures, ultrasound (sonogram), allergy testing and capsulotomy.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 126
capsulotomy 17
doctor visit 362
eye procedures 650
laser treatment 17
ultrasound (sonogram) 148

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 86
Female 118
Ethnicity
Non-Hispanic White 105
Black 0
Hispanic 56
Asian 0
Other 0
Native American 0
Age
From 65 to 74 85
From 75 to 84 64
85 and over 34
Less than 65 21

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2019

Hypertension 75
High Cholesterol 74
Stroke 6
Ischemic Heart Disease 37
Depression 19
Chronic Kidney Disease 52
Asthma 10
Osteoperosis 17
Atrial Fibrilation 9
Heart Failure 20
Chronic Obstructive Pulmonary Disease 10
Diabetes 52
Dementia 11
Cancer 12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2020 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 66
doctor visit 160
eye procedures 305
ultrasound (sonogram) 79

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 48
Female 71
Ethnicity
Non-Hispanic White 56
Black 0
Hispanic 30
Asian 0
Other 0
Native American 0
Age
From 65 to 74 53
From 75 to 84 38
85 and over 12
Less than 65 16

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2020

Hypertension 75
High Cholesterol 71
Stroke 0
Ischemic Heart Disease 42
Depression 12
Chronic Kidney Disease 51
Asthma 0
Osteoperosis 16
Atrial Fibrilation 0
Heart Failure 14
Chronic Obstructive Pulmonary Disease 0
Diabetes 54
Dementia 0
Cancer 11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2021 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 81
doctor visit 222
eye procedures 473
ultrasound (sonogram) 111

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 60
Female 78
Ethnicity
Non-Hispanic White 73
Black 0
Hispanic 0
Asian 28
Other 0
Native American 0
Age
From 65 to 74 57
From 75 to 84 50
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2021

Hypertension 75
High Cholesterol 75
Stroke 0
Ischemic Heart Disease 42
Depression 12
Chronic Kidney Disease 42
Asthma 0
Osteoperosis 18
Atrial Fibrilation 10
Heart Failure 12
Chronic Obstructive Pulmonary Disease 10
Diabetes 49
Dementia 0
Cancer 10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA during 2022 were eye procedures, ultrasound (sonogram) and allergy testing.

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

allergy testing 95
doctor visit 203
eye procedures 323
ultrasound (sonogram) 96

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 58
Female 77
Ethnicity
Non-Hispanic White 80
Black 0
Hispanic 0
Asian 24
Other 0
Native American 0
Age
From 65 to 74 55
From 75 to 84 46
85 and over 21
Less than 65 13

Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD in 2022

Hypertension 75
High Cholesterol 75
Stroke 9
Ischemic Heart Disease 38
Depression 12
Chronic Kidney Disease 28
Asthma 8
Osteoperosis 23
Atrial Fibrilation 16
Heart Failure 13
Chronic Obstructive Pulmonary Disease 10
Diabetes 39
Dementia 0
Cancer 15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Thomas C. O Neil, MD for Medicare patients.

The highest averages for the top procedures that Dr. Thomas C. O Neil, MD treated as an ophthalmologist in Tracy, CA were eye procedures, ultrasound (sonogram), allergy testing and capsulotomy.

allergy testing 73
capsulotomy 18
doctor visit 313
eye procedures 550
laser treatment 18
ultrasound (sonogram) 96

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Thomas C. O Neil, MD.

Gender
Male 71
Female 104
Ethnicity
Black / African American 0
Asian / Pacific Islander 6
Non-Hispanic White 97
Native American / Alaskan Native 0
Hispanic 37
Other 0
Age
75 to 84 61
85 and over 25
Less than 65 15
65 to 74 70

Average of Total of Conditions of Medicare patients treated by Dr. Thomas C. O Neil, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Thomas C. O Neil, MD treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 68
High Cholesterol 65
Stroke 1
Ischemic Heart Disease 36
Depression 13
Chronic Kidney Disease 37
Asthma 6
Osteoporosis 14
Heart Failure 13
Chronic Obstructive Pulmonary Disease 8
Diabetes 45
Atrial Fibrillation 7
Dementia 6
Cancer 9

Education & Training

Dr. Thomas C. O Neil, MD graduated from University of Iowa, Carver College of Medicine. He completed residency at University of Nebraska Medical Center. He is certified by the Board Certification: Ophthalmology and has a state license in California.

Medical School: University of Iowa, Carver College of Medicine

Residency: University of Nebraska Medical Center

Board Certification: Board Certification: Ophthalmology

Licensed In: California

Affiliations & Hospitals

Dr. Thomas C. O Neil, MD is associated with these hospitals and organizations:

Sutter Health
Hill Physicians

Ratings & Reviews

Dr. Thomas C. O Neil, MD has a good overall rating with an average of 2.6 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. Thomas C. O Neil, MD from all over the web to help you find the right in Tracy, CA. 

2.6
Overall Rating
Leave a Review

Biography

Dr. Thomas Oneil is a specialist in ophthalmology (eye disease) in Tracy, CA. He attended medical school at the University of Iowa, Carver College of Medicine. He trained at the University of Nebraska Medical Center for his residency. Dr. Oneil's patients gave him an average rating of 2.5 stars (out of 5). Dr. Oneil (or staff) speaks German. In addition, he offers interpreting services for patients who speak Spanish. His professional affiliations include Sutter Tracy Community Hospital and Hill Physicians. He has an open panel in Tracy, CA according to Hill Physicians.

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