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Dr. Joann Cong Yin Chang, MD

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Specializes in: Ophthalmology (Eye Disease)

University of Cincinnati College of Medicine (2004)

Professional interests include: cataract surgery, cornea problems, comprehensive ophthalmology

413 Main Street
Athol, MA 01331

(978) 249-4209

Dr. Joann Cong Yin Chang, MD is an ophthalmologist in Acton, MA specializing in ophthalmology (eye disease). She graduated from University of Cincinnati College of Medicine in 2004 and has 22 years of experience. Dr. Joann Cong Yin Chang, MD is affiliated with UMass Memorial HealthAlliance - Clinton Hospital, UMass Memorial Medical Center and UMass Memorial Health.

Office Locations

UMass Memorial Health

100 Powdermill Road
Acton, MA 01720

(978) 897-7212

(978) 461-0345

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UMass Memorial Health

255 Park Avenue
Worcester, MA 01609

(508) 753-1032

(508) 755-5705

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UMass Memorial Health

413 Main Street
Athol, MA 01331

(978) 249-4209

(978) 249-4102

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UMass Memorial Health

479 Old Union Turnpike
Lancaster, MA 01523

(978) 537-3900

(978) 537-6030

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UMass Memorial Health

74 Main Street
Gardner, MA 01440

(978) 632-3930

(978) 632-3158

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Noteworthy Medicare Patient Procedures Performed by Dr. Joann Cong Yin Chang, MD in 2023

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

Top 5%

By Volume:

punctal ablation

In 2023, Dr. Joann Cong Yin Chang, MD performed more punctal ablation procedures for Medicare patients than 95% of providers in related specialties within Massachusetts.

Top 10%

By Volume:

simple cataract surgery

In 2023, Dr. Joann Cong Yin Chang, MD performed more simple cataract surgery procedures for Medicare patients than 90% of providers in related specialties within Massachusetts.

Top 25%

By Volume:

laser surgery

punctal occlusion

YAG laser capsulotomy

By Affordability:

anterior segment surgery

cataract surgery

cataract surgery with IOL implantation

extracapsular cataract extraction with IOL implantation

extracapsular lens removal

intraocular lens implant

laser eye surgery

lens removal surgery

lens replacement surgery

secondary cataract surgery

simple cataract surgery

YAG laser capsulotomy

YAG laser surgery

In 2012, among providers in related specialties within Massachusetts, Dr. Joann Cong Yin Chang, MD performed more laser surgery, punctal occlusion, and YAG laser capsulotomy procedures for Medicare patients than 75% of them and she also had a list price for anterior segment surgery, cataract surgery, cataract surgery with IOL implantation, extracapsular cataract extraction (ECCE) with IOL implantation, extracapsular lens removal, intraocular lens (IOL) implant, laser eye surgery, lens removal surgery, lens replacement surgery, secondary cataract surgery, simple cataract surgery, YAG laser capsulotomy, and YAG laser surgery that was lower than the list prices billed to Medicare by 75% of them. 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. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2012 were eye procedures, lacrimal (tearing system) procedures, ultrasound (sonogram) and ablation.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	25
doctor visit	786
eye procedures	444
lacrimal (tearing system) procedures	123
ultrasound (sonogram)	106

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2013 were eye procedures, lab tests, ultrasound (sonogram) and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

doctor visit	230
eye procedures	1027
lab tests	112
lacrimal (tearing system) procedures	40
ultrasound (sonogram)	48

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	242
Female	416

**Ethnicity**
Non-Hispanic White	534
Black	58
Hispanic	45
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	261
From 75 to 84	185
85 and over	126
Less than 65	86

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2013

Hypertension	65
High Cholesterol	58
Stroke	7
Ischemic Heart Disease	43
Depression	16
Chronic Kidney Disease	16
Asthma	10
Osteoperosis	11
Atrial Fibrilation	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	12
Diabetes	40
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2014 were eye procedures, lab tests, ultrasound (sonogram) and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

diagnostic imaging	15
doctor visit	129
eye procedures	1685
lab tests	440
lacrimal (tearing system) procedures	57
ultrasound (sonogram)	58

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	280
Female	431

**Ethnicity**
Non-Hispanic White	519
Black	94
Hispanic	53
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	290
From 75 to 84	201
85 and over	144
Less than 65	76

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2014

Hypertension	69
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	43
Depression	14
Chronic Kidney Disease	16
Asthma	9
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	21
Chronic Obstructive Pulmonary Disease	11
Diabetes	44
Dementia	13
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2015 were eye procedures, skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

allergy testing	719
doctor visit	195
eye procedures	897
lab tests	150
lacrimal (tearing system) procedures	72
minimally invasive procedures	719
skin testing	719
ultrasound (sonogram)	27

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	414
Female	698

**Ethnicity**
Non-Hispanic White	840
Black	88
Hispanic	110
Asian	36
Other	38
Native American	0

**Age**
From 65 to 74	434
From 75 to 84	238
85 and over	136
Less than 65	304

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2015

Hypertension	63
High Cholesterol	54
Stroke	5
Ischemic Heart Disease	30
Depression	24
Chronic Kidney Disease	17
Asthma	14
Osteoperosis	10
Atrial Fibrilation	8
Heart Failure	14
Chronic Obstructive Pulmonary Disease	13
Diabetes	36
Dementia	10
Cancer	8

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2016 were eye procedures, lacrimal (tearing system) procedures, ablation and ultrasound (sonogram).

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	31
capsulotomy	21
doctor visit	461
eye procedures	1074
lacrimal (tearing system) procedures	173
laser treatment	21
ultrasound (sonogram)	27

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	198
Female	349

**Ethnicity**
Non-Hispanic White	448
Black	0
Hispanic	71
Asian	0
Other	11
Native American	0

**Age**
From 65 to 74	215
From 75 to 84	114
85 and over	44
Less than 65	174

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2016

Hypertension	55
High Cholesterol	46
Stroke	3
Ischemic Heart Disease	25
Depression	33
Chronic Kidney Disease	22
Asthma	25
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	10
Chronic Obstructive Pulmonary Disease	18
Diabetes	27
Dementia	9
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2017 were eye procedures, lacrimal (tearing system) procedures, injections and capsulotomy.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	20
capsulotomy	29
doctor visit	444
eye procedures	1484
injections	47
lacrimal (tearing system) procedures	182
laser treatment	29
ultrasound (sonogram)	18

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	257
Female	419

**Ethnicity**
Non-Hispanic White	573
Black	0
Hispanic	64
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	278
From 75 to 84	148
85 and over	63
Less than 65	187

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2017

Hypertension	60
High Cholesterol	40
Stroke	2
Ischemic Heart Disease	25
Depression	33
Chronic Kidney Disease	26
Asthma	13
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	12
Cancer	6

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2018 were eye procedures, injections, lacrimal (tearing system) procedures and ablation.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	33
capsulotomy	24
doctor visit	541
eye procedures	2071
injections	234
lacrimal (tearing system) procedures	225
laser treatment	24
ultrasound (sonogram)	21

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	328
Female	475

**Ethnicity**
Non-Hispanic White	671
Black	14
Hispanic	83
Asian	14
Other	21
Native American	0

**Age**
From 65 to 74	324
From 75 to 84	202
85 and over	94
Less than 65	183

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2018

Hypertension	62
High Cholesterol	53
Stroke	5
Ischemic Heart Disease	27
Depression	31
Chronic Kidney Disease	29
Asthma	10
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	15
Chronic Obstructive Pulmonary Disease	17
Diabetes	31
Dementia	10
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2019 were eye procedures, lacrimal (tearing system) procedures, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	19
capsulotomy	34
doctor visit	495
eye procedures	1714
injections	16
lacrimal (tearing system) procedures	193
laser treatment	34
ultrasound (sonogram)	13

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	293
Female	433

**Ethnicity**
Non-Hispanic White	600
Black	0
Hispanic	76
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	322
From 75 to 84	192
85 and over	59
Less than 65	153

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2019

Hypertension	60
High Cholesterol	49
Stroke	3
Ischemic Heart Disease	29
Depression	31
Chronic Kidney Disease	0
Asthma	10
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	14
Chronic Obstructive Pulmonary Disease	15
Diabetes	27
Dementia	10
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2020 were eye procedures, lacrimal (tearing system) procedures, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	22
capsulotomy	51
doctor visit	376
eye procedures	1684
injections	20
lacrimal (tearing system) procedures	169
laser treatment	51
ultrasound (sonogram)	13

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	253
Female	403

**Ethnicity**
Non-Hispanic White	564
Black	0
Hispanic	57
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	320
From 75 to 84	166
85 and over	57
Less than 65	113

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2020

Hypertension	57
High Cholesterol	49
Stroke	3
Ischemic Heart Disease	27
Depression	29
Chronic Kidney Disease	29
Asthma	12
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	6
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2021 were eye procedures, lacrimal (tearing system) procedures, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

ablation	20
capsulotomy	55
diagnostic imaging	16
doctor visit	927
eye procedures	1420
lacrimal (tearing system) procedures	176
laser treatment	55
ultrasound (sonogram)	29

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	250
Female	427

**Ethnicity**
Non-Hispanic White	576
Black	0
Hispanic	57
Asian	0
Other	25
Native American	0

**Age**
From 65 to 74	322
From 75 to 84	187
85 and over	59
Less than 65	109

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2021

Hypertension	60
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	24
Depression	28
Chronic Kidney Disease	26
Asthma	11
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA during 2022 were eye procedures, lacrimal (tearing system) procedures, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

capsulotomy	59
doctor visit	1060
eye procedures	1398
lacrimal (tearing system) procedures	142
laser treatment	59

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Male	291
Female	414

**Ethnicity**
Non-Hispanic White	630
Black	0
Hispanic	41
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	337
From 75 to 84	220
85 and over	57
Less than 65	91

Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD in 2022

Hypertension	66
High Cholesterol	70
Stroke	5
Ischemic Heart Disease	17
Depression	25
Chronic Kidney Disease	19
Asthma	11
Osteoperosis	14
Atrial Fibrilation	14
Heart Failure	12
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	5
Cancer	14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Joann Cong Yin Chang, MD for Medicare patients.

The highest averages for the top procedures that Dr. Joann Cong Yin Chang, MD treated as an ophthalmologist in Acton, MA were eye procedures, allergy testing, minimally invasive procedures and skin testing.

ablation	24
allergy testing	719
capsulotomy	39
diagnostic imaging	15
doctor visit	513
eye procedures	1354
injections	79
lab tests	234
lacrimal (tearing system) procedures	141
laser treatment	39
minimally invasive procedures	719
skin testing	719
ultrasound (sonogram)	36

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Joann Cong Yin Chang, MD.

**Gender**
Female	405
Male	255

**Ethnicity**
Black / African American	23
Asian / Pacific Islander	6
Non-Hispanic White	541
Hispanic	59
Native American / Alaskan Native	0
Other	16

**Age**
85 and over	76
75 to 84	168
Less than 65	134
65 to 74	282

Average of Total of Conditions of Medicare patients treated by Dr. Joann Cong Yin Chang, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Joann Cong Yin Chang, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	56
High Cholesterol	48
Stroke	3
Ischemic Heart Disease	26
Depression	24
Chronic Kidney Disease	18
Asthma	11
Osteoporosis	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Atrial Fibrillation	9
Dementia	8
Cancer	8

Education & Training

Dr. Joann Cong Yin Chang, MD graduated from University of Cincinnati College of Medicine in 2004. She completed residency at University of Chicago Medical Center. She is certified by the Board Certification: Ophthalmology and has a state license in Massachusetts.

Medical School: University of Cincinnati College of Medicine (2004)

Residency: University of Chicago Medical Center

Board Certification: Board Certification: Ophthalmology

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Joann Cong Yin Chang, MD is associated with these hospitals and organizations:

UMass Memorial HealthAlliance - Clinton Hospital

UMass Memorial Medical Center

UMass Memorial Health

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General Payments

These charts describe general payments received by Dr. Joann Cong Yin Chang, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Allergan Inc.	$25,198 RESTASIS $24,236	LUMIGAN $398	COMBIGAN $125	OZURDEX $86	$354
Allergan, Inc.	$23,841 RESTASIS MULTIDOSE $10,980	RESTASIS $6,730	VUITY $6,130	LUMIGAN $2
Johnson & Johnson Surgical Vision, Inc.	$2,863 Tecnis Symphony Toric IOL $2,575	Tecnis 1-piece IOL $173	Catalys Laser System $59	Tecnis Multifocal family of 1-piece IOLs $33	Healon Viscoelastics $23
Novabay Pharmaceuticals, Inc.	$1,093 Avenova $1,093
Alcon Vision LLC	$617 ReSTOR $217	ARGOS $165	ORA $133	CLAREON $102
Other	$4,426 XIIDRA $590	TYRVAYA $465	PROLENSA $298	ACTHAR $225	RXSIGHT LIGHT ADJUSTABLE LENS (RXLAL) $195	Other $2,654

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$45,088
Food and Beverage	$9,112
Travel and Lodging	$2,577
Compensation for serving as faculty or as a speaker for a non-accredited and noncertified continuing education program	$1,000
Education	$261

Biography

Dr. Joann Chang, who practices in Lancaster, MA, Acton, MA, and Gardner, MA, is a medical specialist in surgery and ophthalmology (eye disease). She has a special interest in cataract surgery, comprehensive ophthalmology, and cornea problems. She graduated from the University of Cincinnati College of Medicine. Dr. Chang's training includes a residency program at the University of Chicago Medical Center. She is conversant in Chinese. Her professional affiliations include Heywood Hospital, UMass Memorial HealthAlliance - Clinton Hospital, and UMass Memorial Medical Center.