In 2023, Dr. Andrew T. Marshall, MD performed more blood draw, creatinine urine test, hepatitis C antibody screening, lab tests, phlebotomy for lab tests, and preventive care procedures for Medicare patients than 95% of providers in related specialties within New York.

Top 10%

By Volume:

colorectal cancer screening

complete blood count

lipid profile

In 2023, Dr. Andrew T. Marshall, MD performed more colorectal cancer screening, complete blood count (CBC), and lipid profile procedures for Medicare patients than 90% of providers in related specialties within New York.

Top 25%

By Volume:

endoscopy

fecal occult blood test

gastrointestinal endoscopy

microalbumin urine test

screening stool guaiac test

total PSA test

In 2012, Dr. Andrew T. Marshall, MD performed more endoscopy, fecal occult blood test (FOBT), gastrointestinal (GI) endoscopy, microalbumin urine test, screening stool guaiac test (gFOBT), and total PSA test procedures for Medicare patients than 75% of providers in related specialties within New York.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2012 were lab tests, preventive care, thyroid function tests and blood draw.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

allergy testing	96
blood draw	571
cardiac procedures	60
diabetes management	108
diagnostic procedures	20
doctor visit	757
gastrointestinal procedures	43
lab tests	7822
minimally invasive procedures	43
preventive care	1633
removal of lesion (e.g. growth)	20
thyroid function tests	853
ultrasound (sonogram)	95
vaccines	71
vascular procedures	35

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2013 were lab tests, preventive care, thyroid function tests and blood draw.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

allergy testing	92
blood draw	546
cardiac procedures	69
diabetes management	144
diagnostic procedures	23
doctor visit	722
gastrointestinal procedures	62
lab tests	9963
minimally invasive procedures	62
preventive care	1788
removal of lesion (e.g. growth)	23
thyroid function tests	1039
ultrasound (sonogram)	109
vaccines	95
vascular procedures	40

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	161
Female	126

**Ethnicity**
Non-Hispanic White	263
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	158
From 75 to 84	82
85 and over	30
Less than 65	17

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2013

Hypertension	63
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	68
Depression	9
Chronic Kidney Disease	10
Asthma	5
Osteoperosis	6
Atrial Fibrilation	6
Heart Failure	11
Chronic Obstructive Pulmonary Disease	6
Diabetes	44
Dementia	5
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2014 were lab tests, preventive care, thyroid function tests and blood draw.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

allergy testing	42
blood draw	451
cardiac procedures	41
diabetes management	70
diagnostic procedures	21
doctor visit	607
gastrointestinal procedures	57
lab tests	4656
minimally invasive procedures	57
preventive care	1031
removal of lesion (e.g. growth)	21
thyroid function tests	613
ultrasound (sonogram)	58
vaccines	77
vascular procedures	17

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	136
Female	127

**Ethnicity**
Non-Hispanic White	238
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	163
From 75 to 84	64
85 and over	25
Less than 65	11

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2014

Hypertension	63
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	66
Depression	7
Chronic Kidney Disease	10
Asthma	5
Osteoperosis	11
Atrial Fibrilation	5
Heart Failure	12
Chronic Obstructive Pulmonary Disease	5
Diabetes	35
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2015 were lab tests, preventive care, blood draw and vaccines.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	447
diabetes management	61
diagnostic procedures	33
doctor visit	783
gastrointestinal procedures	76
lab tests	1390
minimally invasive procedures	76
preventive care	701
removal of lesion (e.g. growth)	33
thyroid function tests	172
vaccines	208

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	298
Female	246

**Ethnicity**
Non-Hispanic White	496
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	328
From 75 to 84	154
85 and over	38
Less than 65	24

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2015

Hypertension	64
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	40
Depression	10
Chronic Kidney Disease	7
Asthma	8
Osteoperosis	11
Atrial Fibrilation	6
Heart Failure	11
Chronic Obstructive Pulmonary Disease	6
Diabetes	24
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2016 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	530
diabetes management	110
diagnostic procedures	57
doctor visit	912
gastrointestinal procedures	110
lab tests	1946
minimally invasive procedures	110
preventive care	880
removal of lesion (e.g. growth)	57
thyroid function tests	269
vaccines	158

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	176
Female	158

**Ethnicity**
Non-Hispanic White	299
Black	0
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	205
From 75 to 84	85
85 and over	31
Less than 65	13

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2016

Hypertension	66
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	35
Depression	9
Chronic Kidney Disease	15
Asthma	11
Osteoperosis	8
Atrial Fibrilation	5
Heart Failure	8
Chronic Obstructive Pulmonary Disease	7
Diabetes	19
Dementia	4
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2017 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	542
diabetes management	104
diagnostic procedures	61
doctor visit	942
gastrointestinal procedures	97
lab tests	1920
minimally invasive procedures	97
preventive care	784
removal of lesion (e.g. growth)	61
thyroid function tests	266
vaccines	146

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	171
Female	150

**Ethnicity**
Non-Hispanic White	285
Black	0
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	195
From 75 to 84	90
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2017

Hypertension	65
High Cholesterol	73
Stroke	0
Ischemic Heart Disease	39
Depression	7
Chronic Kidney Disease	18
Asthma	5
Osteoperosis	10
Atrial Fibrilation	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	7
Diabetes	22
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2018 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	537
diabetes management	86
diagnostic procedures	43
doctor visit	881
gastrointestinal procedures	77
lab tests	1609
minimally invasive procedures	77
preventive care	705
removal of lesion (e.g. growth)	43
thyroid function tests	229
vaccines	147

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	168
Female	149

**Ethnicity**
Non-Hispanic White	289
Black	0
Hispanic	0
Asian	0
Other	17
Native American	0

**Age**
From 65 to 74	185
From 75 to 84	84
85 and over	36
Less than 65	12

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2018

Hypertension	68
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	31
Depression	9
Chronic Kidney Disease	16
Asthma	6
Osteoperosis	8
Atrial Fibrilation	7
Heart Failure	9
Chronic Obstructive Pulmonary Disease	6
Diabetes	21
Dementia	4
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2019 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	562
cardiac procedures	44
diabetes management	122
diagnostic procedures	53
doctor visit	970
gastrointestinal procedures	90
lab tests	2028
minimally invasive procedures	90
preventive care	773
removal of lesion (e.g. growth)	53
thyroid function tests	296
ultrasound (sonogram)	44
vaccines	99

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	152
Female	135

**Ethnicity**
Non-Hispanic White	255
Black	0
Hispanic	0
Asian	0
Other	21
Native American	0

**Age**
From 65 to 74	172
From 75 to 84	78
85 and over	26
Less than 65	11

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2019

Hypertension	70
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	0
Depression	8
Chronic Kidney Disease	16
Asthma	8
Osteoperosis	9
Atrial Fibrilation	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	8
Diabetes	21
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2020 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	469
cardiac procedures	20
diabetes management	119
diagnostic procedures	31
doctor visit	959
gastrointestinal procedures	49
lab tests	2066
minimally invasive procedures	49
preventive care	708
removal of lesion (e.g. growth)	31
thyroid function tests	291
ultrasound (sonogram)	20
vaccines	113

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	168
Female	155

**Ethnicity**
Non-Hispanic White	285
Black	0
Hispanic	0
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	178
From 75 to 84	95
85 and over	32
Less than 65	18

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2020

Hypertension	63
High Cholesterol	72
Stroke	0
Ischemic Heart Disease	33
Depression	10
Chronic Kidney Disease	20
Asthma	6
Osteoperosis	9
Atrial Fibrilation	7
Heart Failure	8
Chronic Obstructive Pulmonary Disease	5
Diabetes	21
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2021 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	541
cardiac procedures	21
diabetes management	101
diagnostic procedures	59
doctor visit	1006
gastrointestinal procedures	94
lab tests	2080
minimally invasive procedures	94
preventive care	648
removal of lesion (e.g. growth)	59
thyroid function tests	277
ultrasound (sonogram)	21
vaccines	12

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	174
Female	157

**Ethnicity**
Non-Hispanic White	297
Black	0
Hispanic	0
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	103
85 and over	34
Less than 65	18

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2021

Hypertension	65
High Cholesterol	73
Stroke	0
Ischemic Heart Disease	34
Depression	11
Chronic Kidney Disease	23
Asthma	4
Osteoperosis	11
Atrial Fibrilation	6
Heart Failure	7
Chronic Obstructive Pulmonary Disease	5
Diabetes	21
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2022 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	539
diabetes management	111
diagnostic procedures	60
doctor visit	994
gastrointestinal procedures	74
lab tests	2114
minimally invasive procedures	74
preventive care	721
removal of lesion (e.g. growth)	60
thyroid function tests	301
vaccines	86

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	175
Female	146

**Ethnicity**
Non-Hispanic White	283
Black	0
Hispanic	0
Asian	0
Other	23
Native American	0

**Age**
From 65 to 74	153
From 75 to 84	118
85 and over	34
Less than 65	16

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2022

Hypertension	71
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	29
Depression	7
Chronic Kidney Disease	14
Asthma	7
Osteoperosis	18
Atrial Fibrilation	9
Heart Failure	5
Chronic Obstructive Pulmonary Disease	6
Diabetes	19
Dementia	5
Cancer	15

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY during 2023 were lab tests, preventive care, blood draw and thyroid function tests.

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

blood draw	472
diabetes management	88
diagnostic procedures	64
doctor visit	942
gastrointestinal procedures	95
lab tests	2175
minimally invasive procedures	95
preventive care	702
removal of lesion (e.g. growth)	64
thyroid function tests	243

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	176
Female	148

**Ethnicity**
Non-Hispanic White	283
Black	0
Hispanic	0
Asian	0
Other	25
Native American	0

**Age**
From 65 to 74	152
From 75 to 84	127
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2023

Hypertension	72
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	27
Depression	8
Chronic Kidney Disease	15
Asthma	7
Osteoperosis	17
Atrial Fibrilation	9
Heart Failure	6
Chronic Obstructive Pulmonary Disease	7
Diabetes	22
Dementia	5
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Andrew T. Marshall, MD for Medicare patients.

The highest averages for the top procedures that Dr. Andrew T. Marshall, MD treated as a gastroenterologist in Hewlett, NY were lab tests, preventive care, blood draw and thyroid function tests.

allergy testing	76
blood draw	517
cardiac procedures	42
diabetes management	102
diagnostic procedures	43
doctor visit	872
gastrointestinal procedures	77
lab tests	3314
minimally invasive procedures	77
preventive care	922
removal of lesion (e.g. growth)	43
thyroid function tests	404
ultrasound (sonogram)	57
vaccines	110
vascular procedures	30

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Andrew T. Marshall, MD.

**Gender**
Male	162
Female	141

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	272
Hispanic	0
Native American / Alaskan Native	0
Other	14

**Age**
75 to 84	90
85 and over	23
Less than 65	11
65 to 74	172

Average of Total of Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Andrew T. Marshall, MD treated were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	60
High Cholesterol	68
Stroke	1
Ischemic Heart Disease	33
Depression	7
Chronic Kidney Disease	13
Asthma	6
Osteoporosis	9
Heart Failure	8
Chronic Obstructive Pulmonary Disease	5
Diabetes	22
Atrial Fibrillation	6
Cancer	10
Dementia	2

Education & Training

He has a state license in New York.

Licensed In: New York

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. Andrew T. Marshall, MD appears to accept the following insurance providers: Magnacare, Great West Healthcare, EmblemHealth Insurance Company, Oscar, Fidelis, Multiplan, Affinity by Molina Healthcare, Aetna, United Healthcare, Tricare, Oxford, Consumer Health Network, Medicare, Empire Blue Cross Blue Shield, Healthfirst, Humana, Cigna, Coventry, Anthem Blue Cross Blue Shield, MVP Health Care, Connecticare, First Health Network, Private Healthcare Systems, Centivo, Northwell Direct Network, The New York State Health Insurance Program, CDPHP, Health Insurance Plan of Greater Network and Partners Health Plan.

Insurance Accepted by Provider includes:

According to our sources, Dr. Andrew T. Marshall, MD accepts the following insurance providers:

Magnacare

Great West Healthcare

EmblemHealth Insurance Company

Oscar

Fidelis

Multiplan

Affinity by Molina Healthcare

Aetna

United Healthcare

Tricare

Oxford

Consumer Health Network

Medicare

Empire Blue Cross Blue Shield

Healthfirst

Humana

Cigna

Coventry

Anthem Blue Cross Blue Shield

MVP Health Care

Connecticare

First Health Network

Private Healthcare Systems

Centivo

Northwell Direct Network

The New York State Health Insurance Program

CDPHP

Health Insurance Plan of Greater Network

Partners Health Plan

Ratings & Reviews

Dr. Andrew T. Marshall, MD does not have any reviews yet, be the first to leave a review of Dr. Andrew T. Marshall, MD here: Leave a Review

(No ratings)

Leave a Review

General Payments

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

**Payments by Company**
SANOFI PASTEUR INC.	$16 ADACEL $16

**Types of Payments**
Food and Beverage	$16

Biography

Dr. Andrew Marshall's specialties are gastroenterology (digestive system) and general internal medicine. Dr. Marshall is a graduate of Mount Sinai School of Medicine. He is professionally affiliated with Optum East. He welcomes new patients at his office inHEWLETT, NY as reported by Optum East.

Select Year:

Dr. Andrew T. Marshall, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Andrew T. Marshall, MD in 2023

By Volume:

By Volume:

By Volume:

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. Andrew T. Marshall, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Average Medicare Patient Data From 2012 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Andrew T. Marshall, MD From 2012 - 2023

Education & Training

Insurance Information

Ratings & Reviews

General Payments

Biography

Other Providers in Hewlett, NY