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Dr. Gregory Zanieski, MD

Accepting New Patients

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Specializes in: General Surgery and Surgical Oncology (Cancer Surgery)

Stony Brook University Medical Center, School of Medicine (2002)

Professional interests include: breast cancer, breast surgery

35 Park Street 8th Floor Clinic
New Haven, CT 06510

(203) 785-3577

Dr. Gregory Zanieski, MD is a general surgeon in Guilford, CT specializing in general surgery and surgical oncology (cancer surgery). He graduated from Stony Brook University Medical Center, School of Medicine in 2002 and has 24 years of experience. Dr. Gregory Zanieski, MD is affiliated with Lawrence + Memorial Hospital, Yale University, Yale New Haven Health and Smilow Cancer Hospital, Yale Medicine.

Office Locations

111 Goose Lane
Guilford, CT 06437

open_in_new

Lawrence + Memorial Hospital

35 Park Street 4th Floor
New Haven, CT 06519

(203) 200-2328

(860) 271-4947

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35 Park Street 8th Floor Clinic
New Haven, CT 06510

(203) 785-3577

(203) 737-4067

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Noteworthy Medicare Patient Procedures Performed by Dr. Gregory Zanieski, MD in 2023

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

Top 25%

By Volume:

breast cancer surgery

breast excision

breast surgery

partial mastectomy

In 2012, Dr. Gregory Zanieski, MD performed more breast cancer surgery, breast excision, breast surgery, and partial mastectomy procedures for Medicare patients than 75% of providers in related specialties within Connecticut.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2012 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	31
cancer surgery	31
diagnostic procedures	22
doctor visit	235
excision	53
lymph node procedures	44
open surgery	22

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2013 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	23
cancer surgery	23
diagnostic procedures	19
doctor visit	204
excision	42
lymph node procedures	38
open surgery	19

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	106
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	60
From 75 to 84	34
85 and over	11
Less than 65	21

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2013

Hypertension	66
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	23
Depression	21
Chronic Kidney Disease	10
Asthma	0
Osteoperosis	17
Atrial Fibrilation	0
Heart Failure	10
Chronic Obstructive Pulmonary Disease	13
Diabetes	34
Dementia	13
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2014 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	43
cancer surgery	43
diagnostic procedures	30
doctor visit	230
excision	73
lymph node procedures	60
open surgery	30

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Gender**
Male	0
Female	129

**Ethnicity**
Non-Hispanic White	110
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	66
From 75 to 84	36
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2014

Hypertension	65
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	22
Depression	17
Chronic Kidney Disease	13
Asthma	12
Osteoperosis	12
Atrial Fibrilation	0
Heart Failure	10
Chronic Obstructive Pulmonary Disease	16
Diabetes	33
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2015 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	41
cancer surgery	41
diagnostic procedures	22
doctor visit	267
excision	63
lymph node procedures	47
open surgery	22

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	254
Black	22
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	148
From 75 to 84	90
85 and over	28
Less than 65	36

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2015

Hypertension	69
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	26
Depression	17
Chronic Kidney Disease	21
Asthma	15
Osteoperosis	13
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	35
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2016 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	28
cancer surgery	28
diagnostic procedures	20
doctor visit	223
excision	48
lymph node procedures	40
open surgery	20

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	116
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	69
From 75 to 84	41
85 and over	16
Less than 65	23

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2016

Hypertension	70
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	21
Asthma	17
Osteoperosis	13
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	32
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2017 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	21
cancer surgery	21
diagnostic procedures	11
doctor visit	270
excision	32
lymph node procedures	22
open surgery	11

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	161
Black	21
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	68
85 and over	17
Less than 65	33

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2017

Hypertension	68
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	29
Depression	19
Chronic Kidney Disease	27
Asthma	8
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	16
Chronic Obstructive Pulmonary Disease	17
Diabetes	36
Dementia	8
Cancer	74

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2018 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	41
cancer surgery	41
diagnostic procedures	29
doctor visit	355
excision	70
lymph node procedures	57
open surgery	29

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	200
Black	16
Hispanic	0
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	121
From 75 to 84	82
85 and over	20
Less than 65	20

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2018

Hypertension	66
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	30
Depression	23
Chronic Kidney Disease	21
Asthma	6
Osteoperosis	14
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	30
Dementia	9
Cancer	75

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2019 were breast procedures, cancer surgery and excision.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	16
cancer surgery	16
doctor visit	130
excision	16

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	112
Black	0
Hispanic	0
Asian	0
Other	11
Native American	0

**Age**
From 65 to 74	63
From 75 to 84	44
85 and over	17
Less than 65	12

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2019

Hypertension	72
High Cholesterol	66
Stroke	0
Ischemic Heart Disease	29
Depression	21
Chronic Kidney Disease	25
Asthma	0
Osteoperosis	21
Atrial Fibrilation	12
Heart Failure	11
Chronic Obstructive Pulmonary Disease	17
Diabetes	38
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

doctor visit	25

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2020

Hypertension	67
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	0
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2021 were breast procedures, cancer surgery and excision.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	14
cancer surgery	14
doctor visit	52
excision	14

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Age**
From 65 to 74	25
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	25
Depression	22
Chronic Kidney Disease	35
Asthma	0
Osteoperosis	29
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT during 2022 were breast procedures, cancer surgery and excision.

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

breast procedures	20
cancer surgery	20
doctor visit	95
excision	20

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Ethnicity**
Non-Hispanic White	66
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	32
From 75 to 84	35
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	19
Depression	28
Chronic Kidney Disease	18
Asthma	0
Osteoperosis	29
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	19
Diabetes	30
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Gregory Zanieski, MD for Medicare patients.

The highest averages for the top procedures that Dr. Gregory Zanieski, MD treated as a general surgeon in Guilford, CT were lymph node procedures, excision, breast procedures and cancer surgery.

breast procedures	27
cancer surgery	27
diagnostic procedures	21
doctor visit	189
excision	43
lymph node procedures	44
open surgery	21

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Gregory Zanieski, MD.

**Gender**
Male	0
Female	11

**Ethnicity**
Black / African American	5
Asian / Pacific Islander	0
Non-Hispanic White	102
Hispanic	2
Native American / Alaskan Native	0
Other	2

**Age**
75 to 84	39
85 and over	9
Less than 65	13
65 to 74	61

Average of Total of Conditions of Medicare patients treated by Dr. Gregory Zanieski, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Gregory Zanieski, MD treated were cancer, hypertension, high cholesterol and diabetes.

Hypertension	63
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	20
Depression	16
Chronic Kidney Disease	17
Asthma	5
Osteoporosis	14
Heart Failure	9
Chronic Obstructive Pulmonary Disease	10
Diabetes	24
Atrial Fibrillation	6
Cancer	68
Dementia	2

Education & Training

Dr. Gregory Zanieski, MD graduated from Stony Brook University Medical Center, School of Medicine in 2002. He completed residency at New York-Presbyterian Hospital. He has a state license in Connecticut.

Medical School: Stony Brook University Medical Center, School of Medicine (2002)

Residency: New York-Presbyterian Hospital

Licensed In: Connecticut

Affiliations & Hospitals

Dr. Gregory Zanieski, MD is associated with these hospitals and organizations:

Lawrence + Memorial Hospital

Yale University

Yale New Haven Health

Smilow Cancer Hospital, Yale Medicine

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. Gregory Zanieski, MD appears to accept the following insurance providers: CorVel, Great-West Healthcare, WellCare, MultiPlan, Community Care Network (CCN), United Healthcare, Aetna, TRICARE, Oxford Health Plans, Medicare, Consumer Health Network, Medicaid, Humana, Cigna, Anthem, ConnectiCare, Focus Health Solutions, Prime Health, First Health, Private Healthcare Systems (PHCS), TRICARE - HEALTH NET FEDERAL, COMPWORKS, HEALTHCARE VALUE MANAGEMENT, MANAGED COMP, TRICARE/CHAMPUS, HUSKY and PREFERRED HEALTH WORKS.

Insurance Accepted by Provider includes:

According to our sources, Dr. Gregory Zanieski, MD accepts the following insurance providers:

CorVel

Great-West Healthcare

WellCare

MultiPlan

Community Care Network (CCN)

United Healthcare

Aetna

TRICARE

Oxford Health Plans

Medicare

Consumer Health Network

Medicaid

Humana

Cigna

Anthem

ConnectiCare

Focus Health Solutions

Prime Health

First Health

Private Healthcare Systems (PHCS)

TRICARE - HEALTH NET FEDERAL

COMPWORKS

HEALTHCARE VALUE MANAGEMENT

MANAGED COMP

TRICARE/CHAMPUS

HUSKY

PREFERRED HEALTH WORKS

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Biography

Dr. Gregory Zanieski's medical specialty is general surgery and surgical oncology (cancer surgery). Dr. Zanieski has indicated that his clinical interests include breast surgery and breast cancer. He is professionally affiliated with Lawrence + Memorial Hospital. He graduated from Stony Brook University Medical Center, School of Medicine and then he performed his residency at New York-Presbyterian Hospital, the University of Pittsburgh Medical Center (UPMC), and a hospital affiliated with Weill Cornell Medical College. He seems to honor Anthem, ConnectiCare, Blue California, and more. Dr. Zanieski welcomes new patients at his office inNew Haven, CT as reported by Lawrence + Memorial Hospital.