In 2023, among providers in related specialties within Arizona, Dr. Brendan O'Neill, MD performed more photodynamic skin therapy, and UV therapy alone (without topical treatment) procedures for Medicare patients than 95% of them and he also had a list price for immunohistochemistry (IHC) test, ultraviolet (UV) light therapy, and UV therapy alone (without topical treatment) that was lower than the list prices billed to Medicare by 95% 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.

Top 10%

By Affordability:

phototherapy

In 2023, Dr. Brendan O'Neill, MD had a list price for phototherapy (light therapy) that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Arizona. 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:

phototherapy

By Affordability:

Mohs surgery

photodynamic skin therapy

photodynamic therapy

removal of benign skin lesion

skin cancer removal

skin cancer surgery

skin lesion destruction

topical photodynamic therapy

In 2012, among providers in related specialties within Arizona, Dr. Brendan O'Neill, MD performed more phototherapy (light therapy) procedures for Medicare patients than 75% of them and he also had a list price for Mohs surgery, photodynamic skin therapy, photodynamic therapy (PDT), removal of benign (non-cancerous) skin lesion, skin cancer removal, skin cancer surgery, skin lesion destruction (e.g. laser surgery), and topical photodynamic therapy 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. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2012 were skin procedures, removal of lesion (e.g. growth), diagnostic procedures and injections.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

diagnostic procedures	224
doctor visit	731
injections	35
phototherapy (light therapy)	25
removal of lesion (e.g. growth)	408
skin procedures	433

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2013 were skin procedures, removal of lesion (e.g. growth), diagnostic procedures and phototherapy (light therapy).

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

diagnostic procedures	89
doctor visit	277
phototherapy (light therapy)	15
removal of lesion (e.g. growth)	134
skin procedures	149

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	150
Female	138

**Ethnicity**
Non-Hispanic White	262
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	128
From 75 to 84	88
85 and over	52
Less than 65	20

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2013

Hypertension	58
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	28
Depression	17
Chronic Kidney Disease	21
Asthma	6
Osteoperosis	7
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	10
Diabetes	25
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2014 were lab tests.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

lab tests	120

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	223
Female	185

**Ethnicity**
Non-Hispanic White	392
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	202
From 75 to 84	149
85 and over	45
Less than 65	12

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2014

Hypertension	60
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	29
Depression	9
Chronic Kidney Disease	17
Asthma	3
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	20
Dementia	5
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2015 were lab tests and second opinions.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

lab tests	443
second opinions	40

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	2058
Female	1706

**Ethnicity**
Non-Hispanic White	3612
Black	0
Hispanic	50
Asian	0
Other	72
Native American	0

**Age**
From 65 to 74	1864
From 75 to 84	1262
85 and over	542
Less than 65	96

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2015

Hypertension	59
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	30
Depression	12
Chronic Kidney Disease	21
Asthma	9
Osteoperosis	7
Atrial Fibrilation	13
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	6
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2016 were lab tests and second opinions.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

lab tests	193
second opinions	29

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	468
Female	430

**Ethnicity**
Non-Hispanic White	846
Black	0
Hispanic	15
Asian	0
Other	21
Native American	0

**Age**
From 65 to 74	458
From 75 to 84	315
85 and over	104
Less than 65	21

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2016

Hypertension	61
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	28
Depression	12
Chronic Kidney Disease	23
Asthma	14
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	23
Dementia	7
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2017 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

diagnostic procedures	39
doctor visit	89
removal of lesion (e.g. growth)	53
skin procedures	53

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	32
Female	35

**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. Brendan O'Neill, MD in 2017

Hypertension	52
High Cholesterol	40
Stroke	0
Ischemic Heart Disease	0
Depression	22
Chronic Kidney Disease	18
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	19
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2018 were lab tests, removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

diagnostic procedures	26
doctor visit	106
lab tests	799
removal of lesion (e.g. growth)	63
skin procedures	63

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	1065
Female	1185

**Ethnicity**
Non-Hispanic White	2145
Black	0
Hispanic	24
Asian	0
Other	61
Native American	0

**Age**
From 65 to 74	1253
From 75 to 84	715
85 and over	240
Less than 65	42

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2018

Hypertension	56
High Cholesterol	55
Stroke	4
Ischemic Heart Disease	26
Depression	15
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	8
Chronic Obstructive Pulmonary Disease	7
Diabetes	18
Dementia	5
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2019 were lab tests, removal of lesion (e.g. growth) and skin procedures.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

doctor visit	178
lab tests	967
removal of lesion (e.g. growth)	110
skin procedures	110

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	1163
Female	1313

**Ethnicity**
Non-Hispanic White	2331
Black	0
Hispanic	40
Asian	0
Other	81
Native American	0

**Age**
From 65 to 74	1401
From 75 to 84	811
85 and over	228
Less than 65	36

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2019

Hypertension	55
High Cholesterol	56
Stroke	3
Ischemic Heart Disease	25
Depression	15
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	9
Chronic Obstructive Pulmonary Disease	8
Diabetes	18
Dementia	5
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2020 were lab tests, removal of lesion (e.g. growth) and skin procedures.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

doctor visit	109
lab tests	700
removal of lesion (e.g. growth)	95
skin procedures	95

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	1109
Female	1102

**Ethnicity**
Non-Hispanic White	2078
Black	0
Hispanic	26
Asian	0
Other	85
Native American	0

**Age**
From 65 to 74	1233
From 75 to 84	765
85 and over	183
Less than 65	30

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2020

Hypertension	53
High Cholesterol	56
Stroke	3
Ischemic Heart Disease	27
Depression	13
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	9
Chronic Obstructive Pulmonary Disease	7
Diabetes	17
Dementia	3
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2021 were skin procedures, removal of lesion (e.g. growth), lab tests and skin surgery.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

cancer surgery	77
diagnostic procedures	13
doctor visit	448
ear procedures	13
lab tests	300
phototherapy (light therapy)	42
removal of lesion (e.g. growth)	377
skin procedures	419
skin surgery	77

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	875
Female	766

**Ethnicity**
Non-Hispanic White	1492
Black	0
Hispanic	0
Asian	0
Other	63
Native American	57

**Age**
From 65 to 74	887
From 75 to 84	560
85 and over	160
Less than 65	34

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2021

Hypertension	49
High Cholesterol	50
Stroke	2
Ischemic Heart Disease	22
Depression	14
Chronic Kidney Disease	21
Asthma	5
Osteoperosis	8
Atrial Fibrilation	7
Heart Failure	7
Chronic Obstructive Pulmonary Disease	6
Diabetes	18
Dementia	5
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ during 2022 were skin procedures, removal of lesion (e.g. growth), phototherapy (light therapy) and lab tests.

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

cancer surgery	137
diagnostic procedures	25
doctor visit	810
ear procedures	25
lab tests	194
phototherapy (light therapy)	205
removal of lesion (e.g. growth)	835
skin procedures	912
skin surgery	137

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	1176
Female	1028

**Ethnicity**
Non-Hispanic White	2028
Black	0
Hispanic	36
Asian	0
Other	60
Native American	67

**Age**
From 65 to 74	1137
From 75 to 84	813
85 and over	220
Less than 65	34

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2022

Hypertension	57
High Cholesterol	68
Stroke	5
Ischemic Heart Disease	15
Depression	11
Chronic Kidney Disease	15
Asthma	8
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	6
Chronic Obstructive Pulmonary Disease	9
Diabetes	16
Dementia	3
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Brendan O'Neill, MD for Medicare patients.

The highest averages for the top procedures that Dr. Brendan O'Neill, MD treated as a mohs skin cancer surgeon in Flagstaff, AZ were lab tests, skin procedures, removal of lesion (e.g. growth) and skin surgery.

cancer surgery	107
diagnostic procedures	69
doctor visit	343
ear procedures	19
injections	35
lab tests	464
phototherapy (light therapy)	71
removal of lesion (e.g. growth)	259
second opinions	34
skin procedures	279
skin surgery	107

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Brendan O'Neill, MD.

**Gender**
Male	756
Female	717

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	1380
Native American / Alaskan Native	11
Hispanic	17
Other	40

**Age**
75 to 84	498
85 and over	161
Less than 65	29
65 to 74	781

Average of Total of Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Brendan O'Neill, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	50
High Cholesterol	49
Stroke	2
Ischemic Heart Disease	20
Depression	12
Chronic Kidney Disease	18
Asthma	5
Osteoporosis	7
Heart Failure	7
Chronic Obstructive Pulmonary Disease	7
Diabetes	17
Atrial Fibrillation	9
Dementia	4
Cancer	10

Education & Training

He has a state license in Arizona.

Licensed In: Arizona

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Brendan O'Neill, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Amgen Inc.	$524 Enbrel $451	Otezla $73
Biofrontera Inc.	$467 BF-RhodoLED $467
AbbVie, Inc.	$453 Humira $265	Skyrizi $82	$105
AbbVie Inc.	$448 Skyrizi $231	Humira $164	Rinvoq $53
Pfizer Inc.	$267 EUCRISA $206	CIBINQO $61
Other	$2,644 DUPIXENT $254	Tremfya $179	VTAMA $167	VenaSeal $163	Erivedge $153	Other $1,729

**Types of Payments**
Food and Beverage	$4,346
Honoraria	$350
Education	$107

Biography

Dr. Brendan O'Neill is a dermatopathology and MOHS-micrographic surgery specialist in Flagstaff, AZ. He is a graduate of Drexel University College of Medicine.

Select Year:

Dr. Brendan O'Neill, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Brendan O'Neill, MD in 2023

By Volume:

By Affordability:

By Affordability:

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Brendan O'Neill, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

Mohs Surgeons in Nearby Locations

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