Provider Profile
Chih Jen Wang, O.D.
Unclaimed ProfileAbout Dr. Wang
Chih Jen Wang, O.D. is an optometrist based in O Fallon, IL. Chih Jen is a 2003 graduate of Indiana University - School of Optometry. Medicare claims data shows Chih Jen provided 68 services to 67 patients. The services billed most often include photography of the retina, established patient complete exam of visual system, and new patient complete exam of visual system.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (618) 397-6575
- Email not available
Practice Locations
1560 W US HIGHWAY 50
O Fallon, IL 62269
Conditions Commonly Evaluated or Treated
Within Optometry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Astigmatism
- Dry eye
- Nearsightedness
- Pink eye
- Presbyopia
Contact lens issues
- Contact Lens Intolerance
Cornea conditions
- Keratoconus
- Pterygium
Corneal issues
- Corneal Neovascularization
- Eye Sunburn
Eye conditions
- Broken Blood Vessel in Eye
Eye discomfort
- Burning Eyes
- Discharge from Eye
- Red Eyes
Eye diseases
- Cataracts
- Diabetic retinopathy
- Glaucoma
- Macular degeneration
- Retinal Tear Symptoms
Eye infections
- Corneal ulcer
Eye inflammation
- Iritis
Eye injuries
- Corneal abrasion
- Foreign Object in Eye
Eye irritation
- Eye Allergies
- Eye Pain
- Watery Eyes
Eye surface issues
- Yellow Bump on Eye
Eyelid conditions
- Blepharitis
- Drooping eyelid
- Eye Twitching
- Stye
Eyelid issues
- Chalazion
- Ectropion
- Entropion
- Eyelash Lice or Dandruff
Pediatric eye conditions
- Eye misalignment (strabismus)
- Lazy eye (amblyopia)
Pupil issues
- Unequal Pupil Sizes
Tear duct issues
- Blocked tear duct
Vision changes
- Blurry Vision
- Color Blindness
- Distorted Vision
- Double Vision
- Eye Floaters and Flashes
- Eye Strain
- Farsightedness
- Halos Around Lights
- Light Sensitivity
- Night Blindness
- Posterior vitreous detachment
- Tunnel Vision
- Visual Migraines
Procedures & services
Most searched procedures
- Contact lens fitting
- Dry eye treatment
- Eye exam
- Glasses prescription
Contact lens exams
- Bifocal or Multifocal Contact Lens Fitting
- Contact Lens Training
- Plano (Non-Prescription) Colored Contact Lens Exam
- Toric Contact Lens Fitting
Dry eye treatments
- Autologous Serum Eye Drops Fitting
- IPL for Dry Eye
- LipiFlow Treatment
- Meibomian Gland Expression
Examinations
- Comprehensive medical eye examination
- Diabetic Eye Exam
- DMV Vision Test
- Low Vision Assessment
- Pediatric Eye Exam
Eyelid care
- Eyelid Deep Cleaning
Eyelid treatments
- Stye Removal
General exams
- School Vision Screening Follow-Up
Glasses and eyewear
- Blue Light Glasses Consultation
- Eyeglass Frame Adjustment and Repair
- Prescription Sunglasses Consultation
- Prism Eyeglasses Fitting
Imaging & tests
- Color Vision Testing
- Corneal topography
- Coronary optical coherence tomography
- Eye-pressure measurement
- Pachymetry
- Retinal photography
- Visual Field Test
Imaging and scans
- Optical Coherence Tomography Scan
Minor procedures
- Amniotic Membrane Placement
- Tear Duct Plugs
Specialty lenses
- Ortho-K
- RGP Contact Lens Fitting
- Scleral Lens Fitting
Surgical evaluations
- Cataract Evaluation
- Corneal Cross-Linking Evaluation
- LASIK Consultation
- PRK Evaluation
Tear duct procedures
- Flushing of Tear Ducts
Therapy
- Sports Vision Training
- Vision Therapy
Urgent care
- Emergency Eye Care
- Foreign Object Removal from Eye
Vision correction
- Myopia Management
Procedures Most Often Billed to Medicare
68 services · 67 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Photography of the retina | Treatment | 92250 |
31 | As often as other peers in Optometrist |
| Established patient complete exam of visual system | Treatment | 92014 |
25 | Less often than most peers in Optometrist |
| New patient complete exam of visual system | Treatment | 92004 |
12 | Less often than most peers in Optometrist |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 1
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other optometrists in O Fallon 7
Same specialty, same city.
Trained at Indiana University - School of Optometry 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2003 at Indiana University - School of Optometry 8
Providers who graduated from the same medical school in the same year.
Also performs Photography of the retina 8
Providers in IL who bill this service to Medicare most often.
Common questions
What does Chih Jen Wang specialize in?
Chih Jen Wang is an optometrist in O Fallon, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Chih Jen Wang located?
Chih Jen Wang is listed at 1560 W US Highway 50, O Fallon, IL 62269. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Chih Jen Wang's phone number?
The number on file is (618) 397-6575. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Chih Jen Wang?
Chih Jen Wang's National Provider Identifier is 1861443079. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Chih Jen Wang train?
Chih Jen Wang attended Indiana University - School of Optometry, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Chih Jen Wang have?
Chih Jen Wang has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What does Chih Jen Wang do most often?
According to Medicare billing data, Chih Jen Wang provides treatments such as photography of the retina and established patient complete exam of visual system. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Chih Jen Wang's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Chih Jen Wang. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.