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Dr. Steven T. Zierer, MD

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Specializes in: Adult Gastroenterology

6020 E Arbor Avenue Suite 101
Mesa, AZ 85206

(480) 985-1700

Dr. Steven T. Zierer, MD is a gastroenterologist in Tucson, AZ specializing in adult gastroenterology. Dr. Steven T. Zierer, MD is affiliated with U.S. Department of Veterans Affairs.

Office Locations

3601 South 6th Avenue Southern Arizona Vahcs (678)
Tucson, AZ 85723

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6020 E Arbor Avenue Suite 101
Mesa, AZ 85206

(480) 985-1700

(480) 396-3659

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320 Sunnyview Lane
Kalispell, MT 59901

(406) 257-0304

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Noteworthy Medicare Patient Procedures Performed by Dr. Steven T. Zierer, MD in 2023

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

Top 25%

By Volume:

colonoscopy

EGD with biopsy

EGD with lesion removal

endoscopy

gastrointestinal endoscopy

preventive care

screening colonoscopy

In 2012, Dr. Steven T. Zierer, MD performed more colonoscopy, EGD with biopsy, EGD with lesion removal, endoscopy, gastrointestinal (GI) endoscopy, preventive care, and screening colonoscopy procedures for Medicare patients than 75% of providers in related specialties within Arizona.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2012 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

diagnostic procedures	315
doctor visit	401
esophageal dilation	15
gastrointestinal procedures	469
hospital care	438
inpatient care	438
minimally invasive procedures	469
preventive care	90
removal of lesion (e.g. growth)	315

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2013 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	23
diagnostic procedures	308
doctor visit	491
esophageal dilation	23
gastrointestinal procedures	463
hospital care	424
inpatient care	424
minimally invasive procedures	463
preventive care	102
removal of lesion (e.g. growth)	308

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	305
Female	367

**Ethnicity**
Non-Hispanic White	622
Black	12
Hispanic	26
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	295
From 75 to 84	243
85 and over	93
Less than 65	41

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2013

Hypertension	75
High Cholesterol	65
Stroke	11
Ischemic Heart Disease	46
Depression	23
Chronic Kidney Disease	32
Asthma	10
Osteoperosis	10
Atrial Fibrilation	18
Heart Failure	26
Chronic Obstructive Pulmonary Disease	22
Diabetes	30
Dementia	11
Cancer	18

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2014 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	15
diagnostic procedures	356
doctor visit	490
esophageal dilation	30
gastrointestinal procedures	501
hospital care	446
inpatient care	446
minimally invasive procedures	501
preventive care	90
removal of lesion (e.g. growth)	356

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	314
Female	408

**Ethnicity**
Non-Hispanic White	650
Black	15
Hispanic	37
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	310
From 75 to 84	260
85 and over	105
Less than 65	47

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2014

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	47
Depression	23
Chronic Kidney Disease	35
Asthma	12
Osteoperosis	10
Atrial Fibrilation	20
Heart Failure	25
Chronic Obstructive Pulmonary Disease	21
Diabetes	31
Dementia	11
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2015 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

diagnostic procedures	291
doctor visit	537
esophageal dilation	14
gastrointestinal procedures	461
hospital care	398
inpatient care	398
minimally invasive procedures	461
preventive care	123
removal of lesion (e.g. growth)	291

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	652
Female	804

**Ethnicity**
Non-Hispanic White	1324
Black	22
Hispanic	74
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	642
From 75 to 84	544
85 and over	190
Less than 65	80

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2015

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	45
Depression	23
Chronic Kidney Disease	34
Asthma	18
Osteoperosis	9
Atrial Fibrilation	20
Heart Failure	24
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Dementia	9
Cancer	15

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2016 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	13
diagnostic procedures	308
doctor visit	564
esophageal dilation	13
gastrointestinal procedures	477
hospital care	395
hydrogen breath test	13
inpatient care	395
methane breath test	13
minimally invasive procedures	477
preventive care	109
removal of lesion (e.g. growth)	308

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	329
Female	397

**Ethnicity**
Non-Hispanic White	661
Black	0
Hispanic	41
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	328
From 75 to 84	262
85 and over	103
Less than 65	33

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2016

Hypertension	75
High Cholesterol	69
Stroke	8
Ischemic Heart Disease	44
Depression	25
Chronic Kidney Disease	38
Asthma	25
Osteoperosis	10
Atrial Fibrilation	22
Heart Failure	26
Chronic Obstructive Pulmonary Disease	21
Diabetes	33
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2017 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	16
diagnostic procedures	311
doctor visit	481
esophageal dilation	16
gastrointestinal procedures	472
hospital care	360
inpatient care	360
minimally invasive procedures	472
preventive care	105
removal of lesion (e.g. growth)	311

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	311
Female	375

**Ethnicity**
Non-Hispanic White	629
Black	0
Hispanic	28
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	317
From 75 to 84	249
85 and over	91
Less than 65	29

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2017

Hypertension	75
High Cholesterol	64
Stroke	11
Ischemic Heart Disease	47
Depression	25
Chronic Kidney Disease	46
Asthma	10
Osteoperosis	12
Atrial Fibrilation	23
Heart Failure	27
Chronic Obstructive Pulmonary Disease	23
Diabetes	36
Dementia	13
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2018 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	21
diagnostic procedures	264
doctor visit	465
esophageal dilation	34
gastrointestinal procedures	464
hospital care	322
inpatient care	322
liver imaging	16
minimally invasive procedures	464
preventive care	124
removal of lesion (e.g. growth)	264
ultrasound (sonogram)	16

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	317
Female	367

**Ethnicity**
Non-Hispanic White	629
Black	0
Hispanic	28
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	350
From 75 to 84	235
85 and over	75
Less than 65	24

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2018

Hypertension	73
High Cholesterol	69
Stroke	8
Ischemic Heart Disease	45
Depression	24
Chronic Kidney Disease	44
Asthma	10
Osteoperosis	10
Atrial Fibrilation	19
Heart Failure	25
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Dementia	12
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2019 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	21
diagnostic procedures	344
doctor visit	541
esophageal dilation	40
gastrointestinal procedures	568
hospital care	302
inpatient care	302
liver imaging	27
minimally invasive procedures	568
preventive care	128
removal of lesion (e.g. growth)	344
ultrasound (sonogram)	27

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	297
Female	407

**Ethnicity**
Non-Hispanic White	642
Black	0
Hispanic	31
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	342
From 75 to 84	273
85 and over	65
Less than 65	24

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2019

Hypertension	73
High Cholesterol	69
Stroke	7
Ischemic Heart Disease	43
Depression	27
Chronic Kidney Disease	42
Asthma	9
Osteoperosis	11
Atrial Fibrilation	19
Heart Failure	21
Chronic Obstructive Pulmonary Disease	21
Diabetes	31
Dementia	11
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2020 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	11
diagnostic procedures	305
doctor visit	468
esophageal dilation	37
gastrointestinal procedures	463
hospital care	224
inpatient care	224
liver imaging	16
minimally invasive procedures	463
preventive care	96
removal of lesion (e.g. growth)	305
ultrasound (sonogram)	16

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	284
Female	358

**Ethnicity**
Non-Hispanic White	571
Black	0
Hispanic	36
Asian	0
Other	14
Native American	0

**Age**
From 65 to 74	303
From 75 to 84	248
85 and over	62
Less than 65	29

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2020

Hypertension	75
High Cholesterol	66
Stroke	7
Ischemic Heart Disease	49
Depression	26
Chronic Kidney Disease	47
Asthma	9
Osteoperosis	13
Atrial Fibrilation	20
Heart Failure	23
Chronic Obstructive Pulmonary Disease	19
Diabetes	35
Dementia	11
Cancer	17

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2021 were gastrointestinal procedures, minimally invasive procedures, diagnostic procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	30
diagnostic procedures	338
doctor visit	543
esophageal dilation	51
gastrointestinal procedures	521
hospital care	185
hydrogen breath test	11
inpatient care	185
liver imaging	21
methane breath test	11
minimally invasive procedures	521
preventive care	115
removal of lesion (e.g. growth)	338
ultrasound (sonogram)	21

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	285
Female	376

**Ethnicity**
Non-Hispanic White	607
Black	0
Hispanic	22
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	318
From 75 to 84	239
85 and over	77
Less than 65	27

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2021

Hypertension	75
High Cholesterol	73
Stroke	7
Ischemic Heart Disease	46
Depression	24
Chronic Kidney Disease	43
Asthma	9
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	20
Chronic Obstructive Pulmonary Disease	18
Diabetes	33
Dementia	9
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ during 2022 were gastrointestinal procedures, minimally invasive procedures, diagnostic procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

balloon dilation	32
diagnostic procedures	318
doctor visit	522
esophageal dilation	32
gastrointestinal procedures	462
hospital care	144
hydrogen breath test	12
inpatient care	144
liver imaging	18
methane breath test	12
minimally invasive procedures	462
preventive care	112
removal of lesion (e.g. growth)	318
ultrasound (sonogram)	18

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	293
Female	337

**Ethnicity**
Non-Hispanic White	573
Black	0
Hispanic	21
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	306
From 75 to 84	235
85 and over	70
Less than 65	19

Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	36
Depression	23
Chronic Kidney Disease	34
Asthma	12
Osteoperosis	16
Atrial Fibrilation	23
Heart Failure	19
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	5
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Steven T. Zierer, MD for Medicare patients.

The highest averages for the top procedures that Dr. Steven T. Zierer, MD treated as a gastroenterologist in Tucson, AZ were gastrointestinal procedures, minimally invasive procedures, inpatient care and hospital care.

balloon dilation	20
diagnostic procedures	314
doctor visit	500
esophageal dilation	27
gastrointestinal procedures	483
hospital care	330
hydrogen breath test	12
inpatient care	330
liver imaging	19
methane breath test	12
minimally invasive procedures	483
preventive care	108
removal of lesion (e.g. growth)	314
ultrasound (sonogram)	19

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Steven T. Zierer, MD.

**Gender**
Male	307
Female	381

**Ethnicity**
Black / African American	4
Asian / Pacific Islander	0
Non-Hispanic White	628
Native American / Alaskan Native	0
Hispanic	31
Other	5

**Age**
75 to 84	253
85 and over	84
Less than 65	32
65 to 74	319

Average of Total of Conditions of Medicare patients treated by Dr. Steven T. Zierer, MD From 2012 - 2022

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

Hypertension	67
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	40
Depression	22
Chronic Kidney Disease	35
Asthma	11
Osteoporosis	10
Heart Failure	21
Chronic Obstructive Pulmonary Disease	18
Diabetes	29
Atrial Fibrillation	18
Dementia	9
Cancer	15

Education & Training

He has a state license in Montana.

Licensed In: Montana

Affiliations & Hospitals

Dr. Steven T. Zierer, MD is associated with these hospitals and organizations:

U.S. Department of Veterans Affairs

Ratings & Reviews

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General Payments

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

**Payments by Company**
AbbVie Inc.	$2,145 Humira $815	Rinvoq $375	Mavyret $311	Creon $242	Skyrizi $180	Other $223
Gilead Sciences, Inc.	$909 $909
Takeda Pharmaceuticals U.S.A., Inc.	$882 ENTYVIO $502	MOTEGRITY $352	$28
AbbVie, Inc.	$873 Humira $274	Mavyret $270	Creon $242	Technivie $65	Viekira $22
Janssen Biotech, Inc.	$730 STELARA $665	SIMPONI $51	REMICADE $14
Other	$5,027 XIFAXAN $534	Injectafer $321	Cimzia $312	Ocaliva $303	ZENPEP $237	Other $3,319

**Types of Payments**
Food and Beverage	$10,460
Education	$105

Ownership and Interest Payments

This table describes ownership payments received by Dr. Steven T. Zierer, MD.

GastroGPO, LLC	2021	$1,287.12	Physician Covered Recipient	Common Stock
GastroGPO, LLC	2022	$1,284.58	Physician Covered Recipient	Common Stock

Biography

Dr. Steven Zierer is a specialist in adult gastroenterology. He graduated from Indiana University School of Medicine. Dr. Zierer is affiliated with U.S. Department of Veterans Affairs.