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Dr. Brian T. Oneill, MD, PHD, FHRS

(Dr. Brian Timothy Oneill, PH.D.)
Specializes in: Adult Endocrinology
University of Utah School of Medicine (2008)
Professional interests include: pituitary disorders, metabolism, parathyroid disease, and more.
200 Hawkins Drive
Iowa City, IA 52242

Dr. Brian T. Oneill, MD, PHD, FHRS is an endocrinologist in Iowa City, IA specializing in adult endocrinology. He graduated from University of Utah School of Medicine in 2008 and has 18 years of experience. Dr. Brian T. Oneill, MD, PHD, FHRS is affiliated with U.S. Department of Veterans Affairs, University of Iowa and University of Iowa Health Care.

View Doctor's Full Profile 1-855-467-3700

Office Locations

200 Hawkins Drive
Iowa City, IA 52242
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3600 30th Street Central Iowa Hcs (636a7) Des Moines Division
Des Moines, IA 50310
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Some issues Dr. Brian T. Oneill, MD, PHD, FHRS can help you with:

Thyroid Problems

Thyroid problems are a group of conditions that alter hormone regulation and metabolism. The thyroid is a small, butterfly-shaped gland located in the lower neck, just below the Adam's apple (laryngeal prominence) and larynx (voice box). Despite its small size, the thyroid has an outsized effect on the body by regulating hormones that control metabolism. Metabolism is the body's process of converting consumed food into fuel to power the entire body. Heart rate, weight, cholesterol, body temperature, and even physical growth and development are all affected by the metabolism.

When the thyroid malfunctions, the body is unable to properly process and allocate energy. Thyroid problems, such as hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid), cause irregular metabolism. In some cases, the body produces antibodies that attack the thyroid cells for unknown reasons. The damaged thyroid responds by releasing either too little or too much T3 and T4 thyroid hormones. Thyroid malfunctions may also arise from genetic causes or iodine deficiency. Thyroid problems may include:

  • Hashimoto's thyroiditis, an autoimmune disease that causes hypothyroidism
  • Graves' disease, an autoimmune disease that causes hyperthyroidism
  • Goiter
  • Thyroid nodule
  • Thyroid cancer

Hashimoto's is the leading cause of hypothyroidism, which is when the thyroid does not produce enough hormones to stimulate adequate metabolism. The condition is diagnosed by blood tests that measure TSH (thyroid stimulating hormone) and detect Hashimoto's antibodies. Symptoms of hypothyroidism include sluggish metabolism, inflammation, fatigue, weight gain, brittle hair, dry skin, and sensitivity to cold. To supplement impaired thyroid function, patients with Hashimoto's are typically prescribed synthetic thyroid hormone pills. Such patients may need to consume synthetic thyroids for the rest of their lives. Other treatments may include dietary changes, such as the avoidance of certain foods and medication to reduce inflammation. Frequent blood tests can inform patients if their TSH levels are within a normal range.

Grave's disease is most frequently the cause of hyperthyroidism, which is when the thyroid produces too many hormones, overstimulating one's metabolism. The condition is also diagnosed by blood tests that measure TSH and detect Grave's antibodies. Elevated heart rate, high blood pressure, sweating, bulging eyes, and weight loss are common symptoms of hyperthyroidism. Treatments for hyperthyroidism include oral radioactive iodine, which slowly shrinks the thyroid, slowing the production of excess thyroid hormone. Other anti-thyroid medications such as methimazole (Tapazole) also reduce the production of thyroid hormones. Blood pressure medications known as beta blockers can ease the increased heart rate caused by hyperthyroidism. If treatments are unsuccessful, patients may be prescribed a thyroidectomy, or surgery to remove part or all of the thyroid. Some patients with hyperthyroidism may require ophthalmological (eye medicine) treatments such as eye drops, prednisone, and surgery to reduce eye swelling and bulging.

Untreated thyroid disorders frequently lead to goiters or thyroid nodules. A thyroid goiter is a large lump that can be felt near the base of the neck and is made of swollen thyroid tissue or nodules (excess cell growth). Nodules and goiters are diagnosed by CT scan or ultrasound. Obstructive goiters can cause pain, coughing, and abnormal breathing. The most common cause of goiters is hyperthyroidism (overactive thyroid). However, Hashimoto's is also known to cause goiters or nodules. Goiters develop from continued damage from antibodies to the thyroid over time. At times, a goiter can result from a cancerous thyroid tumor. Most goiters and nodules are themselves benign.

The exact causes of thyroid cancer are unknown. People who develop thyroid cancer may or may not have another thyroid problem such as Hashimoto's or Grave's disease. Symptoms of thyroid cancer include a nodule that can be felt on the neck, hoarseness, difficulty swallowing, swelling in the neck, and neck and throat pain. CT and MRI scans are used to diagnose thyroid cancer. There are four types of thyroid cancer which vary in intensity. Thyroidectomy (thyroid removal surgery) is usually prescribed to treat thyroid cancer.

Thyroid problems are often long-term conditions that require some form of treatment. With regular monitoring and medication, many people with thyroid problems are able to lead active and fulfilling lives.

Noteworthy Medicare Patient Procedures Performed by Dr. Brian T. Oneill, MD, PHD, FHRS 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 2013, Dr. Brian T. Oneill, MD, PHD, FHRS 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 Iowa. 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

2013 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2013 were lab tests, preventive care and blood draw.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

blood draw 18
doctor visit 14
lab tests 82
preventive care 22

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2013

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2013 were diabetes, high cholesterol and hypertension.

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

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2014 were lab tests, diabetes management, preventive care and hospital care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

blood draw 39
diabetes management 67
doctor visit 50
hospital care 40
inpatient care 40
lab tests 78
preventive care 44

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 45
Female 18
Age
From 65 to 74 27
From 75 to 84 0
85 and over 0
Less than 65 19

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2014

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2014 were diabetes, hypertension, high cholesterol and chronic kidney disease.

Hypertension 75
High Cholesterol 73
Stroke 0
Ischemic Heart Disease 51
Depression 25
Chronic Kidney Disease 59
Asthma 0
Osteoperosis 0
Atrial Fibrilation 21
Heart Failure 38
Chronic Obstructive Pulmonary Disease 0
Diabetes 75
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2015 were lab tests, diabetes management, preventive care and blood draw.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

blood draw 62
diabetes management 99
doctor visit 64
hospital care 59
inpatient care 59
lab tests 173
preventive care 77

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 96
Female 68
Ethnicity
Non-Hispanic White 126
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 70
From 75 to 84 0
85 and over 0
Less than 65 58

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2015

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2015 were diabetes, high cholesterol, hypertension and chronic kidney disease.

Hypertension 75
High Cholesterol 75
Stroke 0
Ischemic Heart Disease 52
Depression 37
Chronic Kidney Disease 71
Asthma 16
Osteoperosis 0
Atrial Fibrilation 13
Heart Failure 39
Chronic Obstructive Pulmonary Disease 24
Diabetes 75
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2016 were lab tests, diabetes management, preventive care and blood draw.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

blood draw 23
diabetes management 37
doctor visit 53
lab tests 37
preventive care 24

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 36
Female 35
Age
From 65 to 74 30
From 75 to 84 0
85 and over 0
Less than 65 23

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2016

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2016 were hypertension, diabetes, high cholesterol and chronic kidney disease.

Hypertension 75
High Cholesterol 66
Stroke 0
Ischemic Heart Disease 27
Depression 35
Chronic Kidney Disease 56
Asthma 25
Osteoperosis 15
Atrial Fibrilation 0
Heart Failure 27
Chronic Obstructive Pulmonary Disease 17
Diabetes 70
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2017 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 103
hospital care 122
inpatient care 122

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 69
Female 116
Ethnicity
Non-Hispanic White 174
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 75
From 75 to 84 0
85 and over 0
Less than 65 68

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2017

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2017 were hypertension, chronic kidney disease, diabetes and high cholesterol.

Hypertension 75
High Cholesterol 59
Stroke 10
Ischemic Heart Disease 44
Depression 45
Chronic Kidney Disease 71
Asthma 16
Osteoperosis 13
Atrial Fibrilation 16
Heart Failure 28
Chronic Obstructive Pulmonary Disease 24
Diabetes 69
Dementia 9
Cancer 10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 82
hospital care 15
inpatient care 15

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 51
Female 83
Age
From 65 to 74 61
From 75 to 84 0
85 and over 0
Less than 65 42

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2018

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2018 were hypertension, high cholesterol, chronic kidney disease and diabetes.

Hypertension 72
High Cholesterol 61
Stroke 0
Ischemic Heart Disease 38
Depression 38
Chronic Kidney Disease 60
Asthma 0
Osteoperosis 19
Atrial Fibrilation 10
Heart Failure 25
Chronic Obstructive Pulmonary Disease 19
Diabetes 60
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 130

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 49
Female 103
Ethnicity
Non-Hispanic White 139
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 71
From 75 to 84 39
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2019

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2019 were hypertension, chronic kidney disease, high cholesterol and diabetes.

Hypertension 69
High Cholesterol 51
Stroke 0
Ischemic Heart Disease 26
Depression 36
Chronic Kidney Disease 53
Asthma 11
Osteoperosis 28
Atrial Fibrilation 13
Heart Failure 24
Chronic Obstructive Pulmonary Disease 16
Diabetes 46
Dementia 9
Cancer 12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2020 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 63
hospital care 74
inpatient care 74

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 52
Female 87
Ethnicity
Non-Hispanic White 127
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 62
From 75 to 84 38
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2020

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2020 were hypertension, high cholesterol, chronic kidney disease and diabetes.

Hypertension 75
High Cholesterol 69
Stroke 14
Ischemic Heart Disease 33
Depression 37
Chronic Kidney Disease 62
Asthma 10
Osteoperosis 18
Atrial Fibrilation 17
Heart Failure 31
Chronic Obstructive Pulmonary Disease 18
Diabetes 60
Dementia 15
Cancer 15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2021 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 75
hospital care 141
inpatient care 141

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 77
Female 93
Ethnicity
Non-Hispanic White 151
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 78
From 75 to 84 45
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2021

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2021 were hypertension, chronic kidney disease, diabetes and high cholesterol.

Hypertension 75
High Cholesterol 64
Stroke 14
Ischemic Heart Disease 44
Depression 38
Chronic Kidney Disease 65
Asthma 11
Osteoperosis 24
Atrial Fibrilation 18
Heart Failure 34
Chronic Obstructive Pulmonary Disease 22
Diabetes 64
Dementia 19
Cancer 13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2022 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 56
hospital care 89
inpatient care 89

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 57
Female 70
Ethnicity
Non-Hispanic White 114
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 62
From 75 to 84 31
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2022

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2022 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 75
High Cholesterol 70
Stroke 9
Ischemic Heart Disease 33
Depression 28
Chronic Kidney Disease 50
Asthma 10
Osteoperosis 23
Atrial Fibrilation 24
Heart Failure 25
Chronic Obstructive Pulmonary Disease 14
Diabetes 61
Dementia 9
Cancer 18

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA during 2023 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

doctor visit 26
hospital care 71
inpatient care 71

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 34
Female 34
Age
From 65 to 74 37
From 75 to 84 0
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS in 2023

The most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated during 2023 were high cholesterol, hypertension, diabetes and chronic kidney disease.

Hypertension 75
High Cholesterol 75
Stroke 16
Ischemic Heart Disease 38
Depression 41
Chronic Kidney Disease 49
Asthma 0
Osteoperosis 18
Atrial Fibrilation 34
Heart Failure 32
Chronic Obstructive Pulmonary Disease 21
Diabetes 69
Dementia 0
Cancer 21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Brian T. Oneill, MD, PHD, FHRS for Medicare patients.

The highest averages for the top procedures that Dr. Brian T. Oneill, MD, PHD, FHRS treated as an endocrinologist in Iowa City, IA were lab tests, hospital care, inpatient care and diabetes management.

blood draw 35
diabetes management 67
doctor visit 65
hospital care 76
inpatient care 76
lab tests 92
preventive care 41

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS.

Gender
Male 51
Female 64
Ethnicity
Black / African American 0
Asian / Pacific Islander 0
Non-Hispanic White 75
Native American / Alaskan Native 0
Hispanic 0
Other 0
Age
75 to 84 13
85 and over 0
Less than 65 19
65 to 74 52

Average of Total of Conditions of Medicare patients treated by Dr. Brian T. Oneill, MD, PHD, FHRS From 2013 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Brian T. Oneill, MD, PHD, FHRS treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 74
High Cholesterol 67
Stroke 5
Ischemic Heart Disease 35
Depression 32
Chronic Kidney Disease 54
Asthma 9
Osteoporosis 14
Heart Failure 27
Chronic Obstructive Pulmonary Disease 15
Diabetes 65
Atrial Fibrillation 15
Dementia 5
Cancer 8

Education & Training

Dr. Brian T. Oneill, MD, PHD, FHRS graduated from University of Utah School of Medicine in 2008. He is certified by the Endocrinology, Diabetes and Metabolism, American Board of Internal Medicine and has a state license in Iowa.

Medical School: University of Utah School of Medicine (2008)

Board Certification: Endocrinology, Diabetes and Metabolism, American Board of Internal Medicine

Licensed In: Iowa

Affiliations & Hospitals

Dr. Brian T. Oneill, MD, PHD, FHRS is associated with these hospitals and organizations:

U.S. Department of Veterans Affairs
University of Iowa
University of Iowa Health Care

Ratings & Reviews

Dr. Brian T. Oneill, MD, PHD, FHRS has an exceptional overall rating with an average of 4.61 out of 5 stars based on 104 ratings. We collect ratings and reviews of Dr. Brian T. Oneill, MD, PHD, FHRS from all over the web to help you find the right in Iowa City, IA. 

4.61
Overall Rating
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Biography

Dr. Brian O'Neill is a medical specialist in adult endocrinology. Areas of expertise for Dr. O'Neill include diabetes, thyroid problems, and pituitary disorders. He has a 4.5 out of 5 star average patient rating. Dr. O'Neill attended medical school at the University of Utah School of Medicine. Dr. O'Neill's hospital/clinic affiliations include the University of Iowa Health Care and U.S. Department of Veterans Affairs.

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