JC
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Chan, Ophthalmologist in Union City, CA?
Dr. John Chan, MD is an Ophthalmologist, who primarily practices in Union City, CA with 1 additional practice location. He is board certified. Dr. Chan is fluent in English, and is currently seeing new patients. Dr. Chan’s practice accepts Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Chan’s office at (510) 454-1000.
What languages does Dr. Chan speak?
Dr. Chan and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Chan treat?
As a Ophthalmologist, Dr. Chan 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. Chan. 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.
Also known as:
- Eye and Ear Disorder Screening
- Health Screening
- Vision Screening
- Hearing Screening
- Eye and Ear Check-up
ICD-10 Codes:
- Z135: Encounter for screening for eye and ear disorders
Also known as:
- Combined Age-Related Cataract
- Cataract
- Mixed Type Cataract
- Multiple Cataract Types
- Cloudy lens
- Lens clouding
- Eye cloudiness
- Cloudy Lens
- Lens Opacity
- Eye Clouding
ICD-10 Codes:
- H25811: Combined forms of age-related cataract, right eye
- H25812: Combined forms of age-related cataract, left eye
- H25813: Combined forms of age-related cataract, bilateral
- H269: Unspecified cataract
Also known as:
- Intraocular Lens Implant
- Cataract
- Refractive Errors
- IOL Implant
- Artificial Eye Lens
- Cataract Lens Implant
ICD-10 Codes:
- Z961: Presence of intraocular lens
Also known as:
- Open-Angle Glaucoma
- Preglaucoma
- Ocular Hypertension
- Glaucoma
- Chronic Open-Angle Glaucoma
- Wide-Angle Glaucoma
- Primary Open-Angle Glaucoma
- Early Glaucoma
- Borderline Glaucoma
- Risk of Glaucoma
- High Eye Pressure
- Elevated Intraocular Pressure
- Eye pressure problem
- Optic Nerve Damage
- Eye Pressure Disorder
ICD-10 Codes:
- H4010X0: Unspecified open-angle glaucoma, stage unspecified
- H40003: Preglaucoma, unspecified, bilateral
- H40059: Ocular hypertension, unspecified eye
- H4089: Other specified glaucoma
Also known as:
- Type 2 Diabetes
- Type 2 Diabetes with Diabetic Retinopathy
- Type 2 Diabetes with Diabetic Eye Disease and Macular Swelling
- Diabetes Type 2
- Type 2 diabetes
- Diabetic Eye Problems
- Diabetes Mellitus Type 2
- Adult-Onset Diabetes
- Non-Insulin Dependent Diabetes
- Diabetic Eye Disease
- Diabetic Retinal Disease
- Diabetes Mellitus Eye Complications
- Diabetic Retinopathy with Macular Edema
- Macular Swelling from Type 2 Diabetes
- Diabetic Macular Edema
ICD-10 Codes:
- E119: Type 2 diabetes mellitus without complications
- E113593: Type 2 diabetes mellitus with proliferative diabetic retinopathy without macular edema, bilateral
- E11311: Type 2 diabetes mellitus with unspecified diabetic retinopathy with macular edema
Also known as:
- Other Pre-Procedure Examination
- Various pre-op checks
- Miscellaneous pre-surgery exams
- Other pre-treatment assessments
ICD-10 Codes:
- Z01818: Encounter for other preprocedural examination
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:
- Routine Eye and Vision Exam (Normal Findings)
- Eye Disease
- Vision Impairment and Blindness
- Annual eye checkup
- Vision screening, no issues
- Eye health exam, all clear
ICD-10 Codes:
- Z0100: Encounter for examination of eyes and vision without abnormal findings
Also known as:
- Wet Macular Degeneration
- Macular Degeneration
- Wet AMD
- Neovascular Macular Degeneration
- Age-related Macular Degeneration (Wet)
ICD-10 Codes:
- H353230: Exudative age-related macular degeneration, bilateral, stage unspecified
Also known as:
- Pink Eye
- Conjunctivitis
- Red Eye
- Eye Infection
- Sore Eye
ICD-10 Codes:
- H109: Unspecified conjunctivitis
Also known as:
- Blocked Central Retinal Vein
- Retinal Disorder
- Central Retinal Vein Occlusion
- Eye Stroke
- CRVO
ICD-10 Codes:
- H348120: Central retinal vein occlusion, left eye, with macular edema
Also known as:
- Chalazion
- Eyelid Disorder
- Meibomian cyst
- Eyelid cyst
- Stye-like bump
ICD-10 Codes:
- H0013: Chalazion right eye, unspecified eyelid
What procedures does Dr. Chan perform?
As a Ophthalmologist, Dr. Chan 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. Chan. 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.
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
Does Dr. Chan accept my insurance?
Dr. Chan accepts most major insurance plans. Important: Please call our office at (510) 454-1000 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Chan accept in Union City, CA?
Dr. Chan in Union City, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alameda Alliance
Alignment Health Plan
All Other Third Party
Central Health
Crown Cork and Seal Company
Medicare
Samaritan Health Services
SGS North America Inc
State of Tennessee
UnitedHealthcare
View All Insurances
Where is Dr. Chan's office located?
What is Dr. Chan's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Chan's National Provider Identifier (NPI) number is 1609928837.
What common questions do patients ask about Dr. Chan?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Chan
What is Dr. John Chan's specialty?
Dr. Chan is a Ophthalmologist near Union City, CA. 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. Contact Dr. Chan to book an appointment today.
Is this Dr. John Chan affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Chan is affiliated with Kaiser Permanente San Leandro Medical Center, California Pacific Medical Center - Van Ness Campus 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
Where can I learn more about Ophthalmologist?
Explore Ophthalmologist with 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 John Chan accepting new patients in Union City, CA?
Yes, Dr. John Chan is accepting new patients at this time.
Does Dr. John Chan offer online booking?
Please contact Dr. Chan's office at (510) 454-1000 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with John Chan?
Please contact Dr. Chan's office at (510) 454-1000 for information regarding telehealth appointment availability or for scheduling assistance.
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