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Dr. Hayward Keith Zwerling, MD

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Specializes in: Adult Endocrinology

9 Loon Hill Road Suite 300
Dracut, MA 01826

(978) 323-0360

Dr. Hayward Keith Zwerling, MD is an endocrinologist in Dracut, MA specializing in adult endocrinology.

Office Locations

9 Loon Hill Road Suite 300
Dracut, MA 01826

(978) 323-0360

(978) 323-0362

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In The News (see more mentions in the news)

“Did Hayward Zwerling, a retired Somerville endocrinologist and amateur woodworker, ask anyone before erecting his renditions of some of the animal kingdom's largest beasts on public land?”—"A wooden elephant and two giraffes appeared on the Somerville Community Path. Meet the guy who put them there.", Boston Globe, April 2024

“BY HAYWARD ZWERLING Synopsis: - After a 3 decade career in a solo private practice the healthcare environment shifted - As an employed physician, my institution's policies hindered my ability to...”—"Moral Injury: A Physician's Premature Retirement", The Health Care Blog, June 2023

“Hayward Zwerling is an endocrinologist with an interest in health information technology, health care policy, woodworking, and politics.”—"Categories", The Health Care Blog, September 2020

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2012 were lab tests, diabetes management and preventive care.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	218
doctor visit	460
lab tests	218
preventive care	32

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2013 were lab tests, diabetes management and preventive care.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	157
doctor visit	428
lab tests	157
preventive care	24

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	99
Female	184

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

**Age**
From 65 to 74	131
From 75 to 84	85
85 and over	33
Less than 65	34

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	31
Depression	20
Chronic Kidney Disease	27
Asthma	7
Osteoperosis	20
Atrial Fibrilation	11
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	46
Dementia	6
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2014 were lab tests, diabetes management and preventive care.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	219
doctor visit	542
lab tests	219
preventive care	42

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	108
Female	219

**Ethnicity**
Non-Hispanic White	301
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	159
From 75 to 84	94
85 and over	35
Less than 65	39

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2014

Hypertension	73
High Cholesterol	72
Stroke	5
Ischemic Heart Disease	30
Depression	19
Chronic Kidney Disease	26
Asthma	6
Osteoperosis	25
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	6
Diabetes	45
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2015 were lab tests and diabetes management.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	240
doctor visit	564
lab tests	240

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	198
Female	474

**Ethnicity**
Non-Hispanic White	628
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	348
From 75 to 84	204
85 and over	74
Less than 65	46

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2015

Hypertension	72
High Cholesterol	71
Stroke	5
Ischemic Heart Disease	27
Depression	21
Chronic Kidney Disease	28
Asthma	9
Osteoperosis	27
Atrial Fibrilation	11
Heart Failure	15
Chronic Obstructive Pulmonary Disease	8
Diabetes	44
Dementia	5
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2016 were lab tests and diabetes management.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	198
doctor visit	533
lab tests	198

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	92
Female	221

**Ethnicity**
Non-Hispanic White	293
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	169
From 75 to 84	89
85 and over	33
Less than 65	22

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2016

Hypertension	73
High Cholesterol	64
Stroke	5
Ischemic Heart Disease	26
Depression	21
Chronic Kidney Disease	38
Asthma	14
Osteoperosis	27
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	45
Dementia	6
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2017 were lab tests and diabetes management.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	247
doctor visit	538
lab tests	247

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	96
Female	219

**Ethnicity**
Non-Hispanic White	292
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	156
From 75 to 84	102
85 and over	36
Less than 65	21

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2017

Hypertension	69
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	29
Depression	17
Chronic Kidney Disease	42
Asthma	5
Osteoperosis	31
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	12
Diabetes	41
Dementia	4
Cancer	14

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2018 were lab tests and diabetes management.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	128
doctor visit	496
lab tests	128

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	95
Female	218

**Ethnicity**
Non-Hispanic White	294
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	146
From 75 to 84	116
85 and over	31
Less than 65	20

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2018

Hypertension	70
High Cholesterol	68
Stroke	5
Ischemic Heart Disease	26
Depression	19
Chronic Kidney Disease	41
Asthma	7
Osteoperosis	28
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	12
Diabetes	43
Dementia	5
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2019 were lab tests and diabetes management.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	17
doctor visit	459
lab tests	17

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	92
Female	207

**Ethnicity**
Non-Hispanic White	277
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	138
From 75 to 84	113
85 and over	28
Less than 65	20

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2019

Hypertension	69
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	26
Depression	21
Chronic Kidney Disease	40
Asthma	6
Osteoperosis	28
Atrial Fibrilation	12
Heart Failure	19
Chronic Obstructive Pulmonary Disease	11
Diabetes	45
Dementia	6
Cancer	17

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2020 were lab tests, diabetes management and preventive care.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	172
doctor visit	537
lab tests	172
preventive care	71

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	98
Female	229

**Ethnicity**
Non-Hispanic White	293
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	155
From 75 to 84	124
85 and over	27
Less than 65	21

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2020

Hypertension	69
High Cholesterol	67
Stroke	4
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	44
Asthma	8
Osteoperosis	28
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	11
Diabetes	46
Dementia	8
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2021 were lab tests, diabetes management and preventive care.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	262
doctor visit	474
lab tests	262
preventive care	110

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	108
Female	215

**Ethnicity**
Non-Hispanic White	284
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	149
From 75 to 84	114
85 and over	36
Less than 65	24

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2021

Hypertension	70
High Cholesterol	72
Stroke	5
Ischemic Heart Disease	32
Depression	23
Chronic Kidney Disease	47
Asthma	10
Osteoperosis	28
Atrial Fibrilation	14
Heart Failure	21
Chronic Obstructive Pulmonary Disease	11
Diabetes	49
Dementia	7
Cancer	16

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA during 2022 were lab tests, diabetes management and preventive care.

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

diabetes management	176
doctor visit	426
lab tests	176
preventive care	95

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	99
Female	201

**Ethnicity**
Non-Hispanic White	264
Black	0
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	132
From 75 to 84	116
85 and over	32
Less than 65	20

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	23
Depression	19
Chronic Kidney Disease	36
Asthma	11
Osteoperosis	34
Atrial Fibrilation	18
Heart Failure	17
Chronic Obstructive Pulmonary Disease	17
Diabetes	48
Dementia	5
Cancer	25

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Hayward Keith Zwerling, MD for Medicare patients.

The highest averages for the top procedures that Dr. Hayward Keith Zwerling, MD treated as an endocrinologist in Dracut, MA were lab tests, diabetes management and preventive care.

diabetes management	184
doctor visit	496
lab tests	184
preventive care	62

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Hayward Keith Zwerling, MD.

**Gender**
Male	98
Female	217

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	289
Hispanic	5
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	105
85 and over	33
Less than 65	24
65 to 74	153

Average of Total of Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Hayward Keith Zwerling, MD treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	65
High Cholesterol	62
Stroke	3
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	33
Asthma	7
Osteoporosis	25
Heart Failure	15
Chronic Obstructive Pulmonary Disease	9
Diabetes	41
Atrial Fibrillation	11
Cancer	14
Dementia	5

Education & Training

He has a state license in Massachusetts.

Licensed In: Massachusetts

Ratings & Reviews

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Biography

Dr. Hayward Zwerling is an adult endocrinology specialist in Dracut, MA. Dr. Zwerling has obtained a license to practice in Massachusetts.

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Dr. Hayward Keith Zwerling, MD

Office Locations

In The News (see more mentions in the news)

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. Hayward Keith Zwerling, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Hayward Keith Zwerling, 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. Hayward Keith Zwerling, MD From 2012 - 2022

Education & Training

Ratings & Reviews

Biography

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