Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Chang, Ophthalmologist in Lancaster, MA?
Dr. Joann Chang, MD is an Ophthalmologist, who primarily practices in Lancaster, MA with 1 additional practice location. She is board certified. Dr. Chang is fluent in English and Chinese, and is currently seeing new patients. Dr. Chang’s practice accepts Medicare, Aetna, Cigna, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Chang’s office.
What are Areas of Expertise for Dr. Chang?
Dr. Joann Chang, MD is a highly-rated, board-certified Ophthalmologist known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Chang empowers patients to confidently navigate their health journey, specializing in Cataract Surgery, Cornea Transplant, Corneal Disease & Transplant, LASIK-Refractive Surgery, and comprehensive wellness support. Serving the Lancaster, MA community, Dr. Chang is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Chang go to medical school and complete their residency?
Medical School: University of Cincinnati / Main Campus
Is Dr. Chang board certified as an Ophthalmologist?
Yes, Dr. Joann Chang, MD is board certified by the American Board of Ophthalmology
What languages does Dr. Chang speak?
Dr. Chang and their clinical team can communicate with patients in the following languages:
Chinese
English
What conditions does an Ophthalmologist like Dr. Chang typically treat?
As an Ophthalmologist, Dr. Chang diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Chang. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Cataract
- Cloudy lens
- Lens clouding
- Eye cloudiness
ICD-10 Codes:
- H2513: Age-related nuclear cataract, bilateral
- H2512: Age-related nuclear cataract, left eye
- H2511: Age-related nuclear cataract, right eye
Also known as:
- Dry Eyes
- Tears
- Dry eye syndrome
- Keratoconjunctivitis sicca
- Ocular dryness
ICD-10 Codes:
- H04123: Dry eye syndrome of bilateral lacrimal glands
Also known as:
- Fuchs' Dystrophy
- Corneal Disorder
- Fuchs' Endothelial Dystrophy
- Corneal Endothelial Dystrophy
- Fuchs' Corneal Disease
ICD-10 Codes:
- H18513: Endothelial corneal dystrophy, bilateral
Also known as:
- Dry Eye Syndrome
- Corneal Disorder
- Dry Eye Disease
- Chronic Dry Eye
- Keratoconjunctivitis Sicca
ICD-10 Codes:
- H16223: Keratoconjunctivitis sicca, not specified as Sjogren's, bilateral
Also known as:
- Aging of the eye's gel
- Eye Disease
- Vitreous Detachment
- Vitreous syneresis
- Eye gel breakdown
- Vitreous aging
ICD-10 Codes:
- H43813: Vitreous degeneration, bilateral
Also known as:
- Borderline Open-Angle Glaucoma
- Glaucoma
- Early Open-Angle Glaucoma
- Open-angle glaucoma suspect
- Risk of Open-Angle Glaucoma
ICD-10 Codes:
- H40013: Open angle with borderline findings, low risk, bilateral
What procedures does an Ophthalmologist like Dr. Chang typically perform?
As an Ophthalmologist, Dr. Chang performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Chang. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Cataract Removal with Lens Implant
- Extracapsular cataract extraction
- Phacoemulsification
- IOL implantation
CPT Codes:
- 66984: Extracapsular cataract removal with insertion of intraocular lens prosthesis (1 stage procedure), manual or mechanical technique (eg, irrigation and aspiration or phacoemulsification); without endoscopic cyclophotocoagulation
Also known as:
- Laser Surgery for Secondary Cataract
- Pterygium Removal with Graft
- Laser Trabeculoplasty
- Tear Duct Opening Closure
- YAG Laser Capsulotomy
- Posterior Capsulotomy
- Secondary Cataract Removal
- Laser Eye Surgery
- Pterygium Excision with Autograft
- Conjunctival Graft for Pterygium
- Surfer's Eye Surgery with Graft
- Glaucoma laser surgery
- Laser eye treatment for glaucoma
- Trabeculoplasty
- Punctal Occlusion
- Lacrimal Punctum Closure
- Dry Eye Treatment (Punctal)
CPT Codes:
- 66821: Discission of secondary membranous cataract (opacified posterior lens capsule and/or anterior hyaloid); laser surgery (eg, YAG laser) (1 or more stages)
- 65426: Excision or transposition of pterygium; with graft
- 65855: Trabeculoplasty by laser surgery
- 68760: Closure of the lacrimal punctum; by thermocauterization, ligation, or laser surgery
Also known as:
- Tear Duct Plug Insertion
- Punctal Plug Insertion
- Lacrimal Punctum Closure
- Dry Eye Plugs
CPT Codes:
- 68761: Closure of the lacrimal punctum; by plug, each
Also known as:
- Complex Cataract Removal with Lens Implant
- Advanced Cataract Surgery
- Phacoemulsification with IOL
- Complex Extracapsular Cataract Extraction
CPT Codes:
- 66982: Extracapsular cataract removal with insertion of intraocular lens prosthesis (1-stage procedure), manual or mechanical technique (eg, irrigation and aspiration or phacoemulsification), complex, requiring devices or techniques not generally used in routine cataract surgery (eg, iris expansion device, suture support for intraocular lens, or primary posterior capsulorrhexis) or performed on patients in the amblyogenic developmental stage; without endoscopic cyclophotocoagulation
Also known as:
- Endothelial Corneal Transplant
- Keratoplasty
- Endothelial keratoplasty
- Corneal graft
CPT Codes:
- 65756: Keratoplasty (corneal transplant); endothelial
Also known as:
- Corneal Foreign Body Removal with Slit Lamp
- Eye Foreign Object Removal
- Corneal Rust Ring Removal
- Slit Lamp Foreign Body Extraction
CPT Codes:
- 65222: Removal of foreign body, external eye; corneal, with slit lamp
Does Dr. Chang accept my insurance?
Dr. Chang accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Chang accept in Lancaster, MA?
Dr. Chang in Lancaster, MA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
BMC Health System
Central Mass Health
CVS Health (formerly Aetna)
Fallon Health
Mass General Brigham
Medicare
Point32Health
State of Massachusetts
UnitedHealth Group
View All Insurances
Where is Dr. Chang's office located?
What is Dr. Chang's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Chang's National Provider Identifier (NPI) number is 1730359100.
What common questions do patients ask about Dr. Chang?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Chang
What is Dr. Joann Chang's specialty?
Dr. Chang is a Ophthalmologist near Lancaster, MA.
What does an Ophthalmologist do?
An ophthalmologist possesses the knowledge and professional skills required to deliver comprehensive eye and vision care. These medical doctors are trained to diagnose, monitor, and treat all ocular and visual disorders, whether through medical or surgical interventions. Their expertise encompasses a wide range of issues affecting the eye and its structures, including the eyelids, orbit, and visual pathways. Additionally, ophthalmologists prescribe vision services, such as glasses and contact lenses, to help patients achieve optimal visual health.
Is this Dr. Joann Chang affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Chang is affiliated with Umass Memorial Healthalliance Clinton Hospital - Leominster Campus, Emerson Health which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see an Ophthalmologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see an Ophthalmologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Joann Chang accepting new patients in Lancaster, MA?
Yes, Dr. Joann Chang is accepting new patients at this time.
Does Dr. Joann Chang offer online booking?
Please contact Dr. Chang's office for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Joann Chang?
Please contact Dr. Chang's office for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Joann Chang have?
Dr. Joann Chang is certified by the American Board of Ophthalmology.
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