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Dr. Jennifer Hartzell Calnan, OD

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Specializes in: Pediatric Optometry

19 Village Square
Chelmsford, MA 01824

(978) 256-5600

Dr. Jennifer Hartzell Calnan, OD is a pediatric optometrist in Chelmsford, MA specializing in pediatric optometry. Dr. Jennifer Hartzell Calnan, OD is affiliated with Tufts Medicine.

Office Locations

19 Village Square
Chelmsford, MA 01824

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Noteworthy Medicare Patient Procedures Performed by Dr. Jennifer Hartzell Calnan, OD in 2023

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

Top 25%

By Volume:

comprehensive eye exam

eye procedures

SCODI of the posterior segment

In 2012, Dr. Jennifer Hartzell Calnan, OD performed more comprehensive eye exam, eye procedures, and SCODI of the posterior segment (SCODI-P) procedures for Medicare patients than 75% of providers in related specialties within Massachusetts.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2012 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

eye procedures	81

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2013 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

eye procedures	112

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	39
Female	82

**Ethnicity**
Non-Hispanic White	101
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	51
From 75 to 84	0
85 and over	0
Less than 65	47

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2013

Hypertension	59
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	18
Depression	31
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2014 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

eye procedures	98

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	26
Female	69

**Ethnicity**
Non-Hispanic White	81
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	34
From 75 to 84	16
85 and over	12
Less than 65	33

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2014

Hypertension	58
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	19
Depression	26
Chronic Kidney Disease	12
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2015 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	30
eye procedures	186

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	156
Female	240

**Ethnicity**
Non-Hispanic White	322
Black	0
Hispanic	0
Asian	32
Other	0
Native American	0

**Age**
From 65 to 74	160
From 75 to 84	68
85 and over	40
Less than 65	128

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2015

Hypertension	63
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	25
Depression	33
Chronic Kidney Disease	18
Asthma	11
Osteoperosis	6
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	15
Diabetes	41
Dementia	9
Cancer	6

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2016 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	26
eye procedures	255

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	94
Female	164

**Ethnicity**
Non-Hispanic White	220
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	47
85 and over	18
Less than 65	66

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2016

Hypertension	64
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	19
Depression	20
Chronic Kidney Disease	28
Asthma	15
Osteoperosis	11
Atrial Fibrilation	6
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	39
Dementia	5
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2017 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	17
eye procedures	292

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	96
Female	167

**Ethnicity**
Non-Hispanic White	220
Black	0
Hispanic	15
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	138
From 75 to 84	44
85 and over	13
Less than 65	68

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2017

Hypertension	68
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	23
Depression	24
Chronic Kidney Disease	30
Asthma	7
Osteoperosis	8
Atrial Fibrilation	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	39
Dementia	7
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2018 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	12
eye procedures	263

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	101
Female	154

**Ethnicity**
Non-Hispanic White	221
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	139
From 75 to 84	47
85 and over	13
Less than 65	56

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2018

Hypertension	67
High Cholesterol	64
Stroke	5
Ischemic Heart Disease	25
Depression	26
Chronic Kidney Disease	28
Asthma	4
Osteoperosis	6
Atrial Fibrilation	9
Heart Failure	14
Chronic Obstructive Pulmonary Disease	13
Diabetes	40
Dementia	5
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2019 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	12
eye procedures	230

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	80
Female	144

**Ethnicity**
Non-Hispanic White	193
Black	0
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	122
From 75 to 84	47
85 and over	11
Less than 65	44

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2019

Hypertension	62
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	21
Depression	22
Chronic Kidney Disease	30
Asthma	9
Osteoperosis	6
Atrial Fibrilation	7
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	38
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2020 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

eye procedures	224

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	69
Female	135

**Ethnicity**
Non-Hispanic White	181
Black	0
Hispanic	0
Asian	11
Other	0
Native American	0

**Age**
From 65 to 74	115
From 75 to 84	38
85 and over	16
Less than 65	35

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2020

Hypertension	63
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	21
Depression	22
Chronic Kidney Disease	28
Asthma	8
Osteoperosis	7
Atrial Fibrilation	7
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	35
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2021 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	16
eye procedures	253

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	89
Female	134

**Ethnicity**
Non-Hispanic White	194
Black	0
Hispanic	0
Asian	12
Other	0
Native American	0

**Age**
From 65 to 74	129
From 75 to 84	49
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2021

Hypertension	58
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	25
Depression	23
Chronic Kidney Disease	26
Asthma	5
Osteoperosis	8
Atrial Fibrilation	6
Heart Failure	11
Chronic Obstructive Pulmonary Disease	6
Diabetes	28
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2022 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	21
eye procedures	297

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	84
Female	155

**Ethnicity**
Non-Hispanic White	207
Black	0
Hispanic	0
Asian	12
Other	0
Native American	0

**Age**
From 65 to 74	122
From 75 to 84	61
85 and over	13
Less than 65	43

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2022

Hypertension	72
High Cholesterol	71
Stroke	0
Ischemic Heart Disease	16
Depression	19
Chronic Kidney Disease	18
Asthma	13
Osteoperosis	11
Atrial Fibrilation	9
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	30
Dementia	0
Cancer	15

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA during 2023 were eye procedures.

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

doctor visit	36
eye procedures	381

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	110
Female	191

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

**Age**
From 65 to 74	155
From 75 to 84	96
85 and over	18
Less than 65	32

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2023

Hypertension	74
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	20
Depression	19
Chronic Kidney Disease	24
Asthma	11
Osteoperosis	13
Atrial Fibrilation	10
Heart Failure	9
Chronic Obstructive Pulmonary Disease	11
Diabetes	29
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Jennifer Hartzell Calnan, OD for Medicare patients.

The highest averages for the top procedures that Dr. Jennifer Hartzell Calnan, OD treated as a pediatric optometrist in Chelmsford, MA were eye procedures.

doctor visit	21
eye procedures	222

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD.

**Gender**
Male	78
Female	136

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	8
Non-Hispanic White	183
Hispanic	4
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	42
85 and over	12
Less than 65	46
65 to 74	107

Average of Total of Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Jennifer Hartzell Calnan, OD treated were hypertension, high cholesterol, diabetes and depression.

Hypertension	59
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	19
Depression	22
Chronic Kidney Disease	21
Asthma	6
Osteoporosis	6
Heart Failure	9
Chronic Obstructive Pulmonary Disease	8
Diabetes	30
Atrial Fibrillation	5
Cancer	7
Dementia	2

Education & Training

She has a state license in Massachusetts.

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Jennifer Hartzell Calnan, OD is associated with these hospitals and organizations:

Tufts Medicine

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Jennifer Hartzell Calnan, OD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Johnson & Johnson Vision Care, Inc.	$3,912 Acuvue $3,827	Soft contact lenses $85
Valeant Pharmaceuticals North America LLC	$1,373 ULTRA $1,338	BTOD $22	BESIVANCE $12
Bausch & Lomb, a division of Bausch Health US, LLC	$460 BIOTRUE $121	Infuse $105	ULTRA MULTIFOCAL TORIC $102	BIOTRUE ONE DAY $90	VYZULTA $42
Bausch & Lomb Americas Inc.	$276 XIIDRA $128	Infuse $125	ALDEN SCLERAL ZENLENS $23
Oyster Point Pharma, Inc.	$148 TYRVAYA $148
Other	$702 XIIDRA $176	XDEMVY $134	DAILIES $132	Oxervate $67	AIR OPTIX $38	Other $156

**Types of Payments**
Food and Beverage	$3,118
Travel and Lodging	$2,169
Consulting Fee	$1,545
Education	$40

Biography

Dr. Jennifer Calnan is a specialist in pediatric optometry. She is professionally affiliated with Tufts Medicine. Dr. Calnan has a closed panel according to Tufts Medicine.

Select Year:

Dr. Jennifer Hartzell Calnan, OD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Jennifer Hartzell Calnan, OD in 2023

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. Jennifer Hartzell Calnan, OD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Jennifer Hartzell Calnan, OD 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. Jennifer Hartzell Calnan, OD From 2012 - 2023

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

Pediatric Optometrists in Nearby Locations

Other Providers in Chelmsford, MA