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Dr. Michael James Zerega, MD

(Michael James Zerega, MD)

(30 Ratings)

Specializes in: Gastroenterology (Digestive System)

Washington University in St. Louis School of Medicine

615 S. New Ballas Road Suite 1200 Mercy Gastroenterology - Mercy Hospital
St. Louis, MO 63141

(314) 251-2880

Dr. Michael James Zerega, MD is a gastroenterologist in St. Louis, MO specializing in gastroenterology (digestive system). He graduated from Washington University in St. Louis School of Medicine. Dr. Michael James Zerega, MD is affiliated with Mercy Health System, Mercy Hospital St. Louis and Mercy Gastroenterology - Mercy Hospital.

Office Locations

615 S. New Ballas Road Suite 1200 Mercy Gastroenterology - Mercy Hospital
St. Louis, MO 63141

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Noteworthy Medicare Patient Procedures Performed by Dr. Michael James Zerega, MD in 2023

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

Top 25%

By Affordability:

esophageal manometry

gastrointestinal motility tests

manometry

In 2012, Dr. Michael James Zerega, MD had a list price for esophageal manometry, gastrointestinal motility tests, and manometry that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Missouri. 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. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2012 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	227
doctor visit	198
esophageal dilation	17
gastrointestinal procedures	345
hospital care	294
inpatient care	294
minimally invasive procedures	345
preventive care	88
removal of lesion (e.g. growth)	227

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2013 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	237
doctor visit	214
esophageal dilation	24
gastrointestinal procedures	353
hospital care	290
inpatient care	290
minimally invasive procedures	353
preventive care	79
removal of lesion (e.g. growth)	237

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	198
Female	264

**Ethnicity**
Non-Hispanic White	412
Black	35
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	207
From 75 to 84	134
85 and over	52
Less than 65	69

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2013

Hypertension	72
High Cholesterol	61
Stroke	4
Ischemic Heart Disease	40
Depression	34
Chronic Kidney Disease	33
Asthma	11
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	26
Chronic Obstructive Pulmonary Disease	19
Diabetes	33
Dementia	10
Cancer	18

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2014 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

balloon dilation	11
diagnostic procedures	207
doctor visit	209
esophageal dilation	11
gastrointestinal procedures	306
hospital care	237
injections	12
inpatient care	237
minimally invasive procedures	306
preventive care	76
removal of lesion (e.g. growth)	207

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	170
Female	238

**Ethnicity**
Non-Hispanic White	359
Black	37
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	210
From 75 to 84	97
85 and over	45
Less than 65	56

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2014

Hypertension	74
High Cholesterol	62
Stroke	5
Ischemic Heart Disease	37
Depression	35
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	21
Chronic Obstructive Pulmonary Disease	18
Diabetes	31
Dementia	10
Cancer	18

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2015 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	217
doctor visit	185
esophageal dilation	13
gastrointestinal procedures	308
hospital care	258
inpatient care	258
minimally invasive procedures	308
preventive care	60
removal of lesion (e.g. growth)	217

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	362
Female	426

**Ethnicity**
Non-Hispanic White	694
Black	56
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	408
From 75 to 84	192
85 and over	74
Less than 65	114

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2015

Hypertension	72
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	33
Depression	33
Chronic Kidney Disease	35
Asthma	16
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	22
Chronic Obstructive Pulmonary Disease	20
Diabetes	29
Dementia	9
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2016 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	216
doctor visit	177
esophageal dilation	14
gastrointestinal procedures	296
hospital care	196
inpatient care	196
minimally invasive procedures	296
preventive care	51
removal of lesion (e.g. growth)	216

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	182
Female	226

**Ethnicity**
Non-Hispanic White	376
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	193
From 75 to 84	118
85 and over	39
Less than 65	58

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2016

Hypertension	71
High Cholesterol	62
Stroke	6
Ischemic Heart Disease	38
Depression	33
Chronic Kidney Disease	40
Asthma	23
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	21
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	16
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2017 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	231
doctor visit	163
gastrointestinal procedures	303
hospital care	208
inpatient care	208
manometry	16
minimally invasive procedures	287
preventive care	56
removal of lesion (e.g. growth)	231

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	226
Female	242

**Ethnicity**
Non-Hispanic White	413
Black	38
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	231
From 75 to 84	124
85 and over	36
Less than 65	77

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2017

Hypertension	72
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	33
Depression	36
Chronic Kidney Disease	42
Asthma	12
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	15
Cancer	16

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2018 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	272
doctor visit	206
esophageal dilation	19
gastrointestinal procedures	355
hospital care	120
injections	12
inpatient care	120
manometry	18
minimally invasive procedures	337
preventive care	34
removal of lesion (e.g. growth)	272

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	194
Female	227

**Ethnicity**
Non-Hispanic White	380
Black	20
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	214
From 75 to 84	118
85 and over	39
Less than 65	50

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2018

Hypertension	69
High Cholesterol	63
Stroke	4
Ischemic Heart Disease	29
Depression	32
Chronic Kidney Disease	39
Asthma	10
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	15
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2019 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	220
doctor visit	114
esophageal dilation	25
gastrointestinal procedures	286
hospital care	134
inpatient care	134
manometry	22
minimally invasive procedures	264
preventive care	19
removal of lesion (e.g. growth)	220

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	170
Female	200

**Ethnicity**
Non-Hispanic White	320
Black	35
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	205
From 75 to 84	92
85 and over	25
Less than 65	48

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2019

Hypertension	68
High Cholesterol	64
Stroke	5
Ischemic Heart Disease	33
Depression	32
Chronic Kidney Disease	35
Asthma	9
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	20
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2020 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	178
doctor visit	116
gastrointestinal procedures	227
hospital care	113
inpatient care	113
manometry	18
minimally invasive procedures	209
preventive care	31
removal of lesion (e.g. growth)	178

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	172
Female	180

**Ethnicity**
Non-Hispanic White	306
Black	30
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	200
From 75 to 84	88
85 and over	19
Less than 65	45

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2020

Hypertension	73
High Cholesterol	68
Stroke	6
Ischemic Heart Disease	33
Depression	33
Chronic Kidney Disease	37
Asthma	11
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	28
Dementia	11
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2021 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	242
doctor visit	137
gastrointestinal procedures	313
hospital care	134
inpatient care	134
manometry	25
minimally invasive procedures	288
preventive care	46
removal of lesion (e.g. growth)	242

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	232
Female	211

**Ethnicity**
Non-Hispanic White	395
Black	23
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	254
From 75 to 84	123
85 and over	22
Less than 65	44

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2021

Hypertension	70
High Cholesterol	69
Stroke	5
Ischemic Heart Disease	36
Depression	33
Chronic Kidney Disease	39
Asthma	8
Osteoperosis	8
Atrial Fibrilation	14
Heart Failure	21
Chronic Obstructive Pulmonary Disease	16
Diabetes	25
Dementia	10
Cancer	18

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO during 2022 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

diagnostic procedures	218
doctor visit	113
gastrointestinal procedures	272
hospital care	80
inpatient care	80
manometry	24
minimally invasive procedures	237
preventive care	19
removal of lesion (e.g. growth)	218

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	188
Female	194

**Ethnicity**
Non-Hispanic White	343
Black	20
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	228
From 75 to 84	107
85 and over	14
Less than 65	33

Conditions of Medicare patients treated by Dr. Michael James Zerega, MD in 2022

Hypertension	71
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	27
Depression	24
Chronic Kidney Disease	30
Asthma	11
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	15
Chronic Obstructive Pulmonary Disease	14
Diabetes	26
Dementia	6
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Michael James Zerega, MD for Medicare patients.

The highest averages for the top procedures that Dr. Michael James Zerega, MD treated as a gastroenterologist in St. Louis, MO were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

balloon dilation	11
diagnostic procedures	224
doctor visit	166
esophageal dilation	17
gastrointestinal procedures	305
hospital care	187
injections	12
inpatient care	187
manometry	20
minimally invasive procedures	293
preventive care	50
removal of lesion (e.g. growth)	224

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Michael James Zerega, MD.

**Gender**
Male	190
Female	218

**Ethnicity**
Black / African American	26
Asian / Pacific Islander	0
Non-Hispanic White	363
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	108
85 and over	33
Less than 65	54
65 to 74	213

Average of Total of Conditions of Medicare patients treated by Dr. Michael James Zerega, MD From 2012 - 2022

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

Hypertension	64
High Cholesterol	58
Stroke	5
Ischemic Heart Disease	30
Depression	29
Chronic Kidney Disease	32
Asthma	11
Osteoporosis	8
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	26
Atrial Fibrillation	12
Cancer	14
Dementia	10

Education & Training

Dr. Michael James Zerega, MD graduated from Washington University in St. Louis School of Medicine. He completed residency at University of North Carolina (UNC) Affiliated Hospitals. He is certified by the Board Certification: Amer Bd Internal Medicine (Gastroenterology) and has a state license in Missouri.

Medical School: Washington University in St. Louis School of Medicine

Residency: University of North Carolina (UNC) Affiliated Hospitals

Board Certification: Board Certification: Amer Bd Internal Medicine (Gastroenterology)

Licensed In: Missouri

Affiliations & Hospitals

Dr. Michael James Zerega, MD is associated with these hospitals and organizations:

Mercy Health System

Mercy Hospital St. Louis

Mercy Gastroenterology - Mercy Hospital

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Michael James Zerega, MD appears to accept the following insurance providers: WellCare Medicare Advantage, United Healthcare, Aetna, Humana, Cigna, Anthem BlueCross BlueShield, HealthLink, Health Net Federal Services, HFN, Inc., MultiPlan/PHCS, Home State Health, Medica, Healthy Blue (formerly Missouri Care), NHC Advantage, Live360 (Health Choices Network), Sterling Medicare, Essence, PPHP (Provider Partners Health Plan) and Ascension Smart Health.

Insurance Accepted by Provider includes:

According to our sources, Dr. Michael James Zerega, MD accepts the following insurance providers:

WellCare Medicare Advantage

United Healthcare

Aetna

Humana

Cigna

Anthem BlueCross BlueShield

HealthLink

Health Net Federal Services

HFN, Inc.

MultiPlan/PHCS

Home State Health

Medica

Healthy Blue (formerly Missouri Care)

NHC Advantage

Live360 (Health Choices Network)

Sterling Medicare

Essence

PPHP (Provider Partners Health Plan)

Ascension Smart Health

Ratings & Reviews

Dr. Michael James Zerega, MD has an exceptional overall rating with an average of 4.97 out of 5 stars based on 30 ratings. We collect ratings and reviews of Dr. Michael James Zerega, MD from all over the web to help you find the right in St. Louis, MO.

4.97

Overall Rating

(30 Ratings)

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General Payments

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

**Payments by Company**
GENZYME CORPORATION	$109 DUPIXENT $109
E.R. Squibb & Sons, L.L.C.	$100 ZEPOSIA $100
Shire North American Group Inc	$87 PENTASA $87
AbbVie Inc.	$71 Skyrizi $49	LINZESS $22
Celgene Corporation	$55 $55
Other	$79 Humira $30	XIFAXAN $20	LINZESS $18	ZENPEP $12

**Types of Payments**
Food and Beverage	$501

Biography

Dr. Michael Zerega practices gastroenterology (digestive system) in Lake Saint Louis, MO and Saint Louis, MO. He has received a 5.0 out of 5 star rating by his patients. Dr. Zerega most likely takes Anthem, Blue California, and HFN, as well as other insurance carriers. He graduated from Washington University in St. Louis School of Medicine. Dr. Zerega's training includes a residency program at a hospital affiliated with the University of North Carolina (UNC). He is professionally affiliated with Mercy Hospital St. Louis. According to Yext, he is not acceping new patients at this time.