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Edit this profileAt a glance
- 735 Insight Ave, O Fallon, IL 62269
About Dr. Ernst
Based in O Fallon, IL, David D. Ernst, O.D. is listed in the NPI registry under optometry. David graduated from University of Nebraska College of Medicine in 2009. David is also listed as specializing in optometrist. According to Medicare claims data, David cared for 1,378 Medicare patients across 8,148 services. The services billed most often include removal of cataract with insertion of prosthetic lens, photography of the retina, and visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient'. NPI 1306076518 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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) 628-2903
- Email not available
Practice Locations
735 INSIGHT AVE
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
Contact lens issues
Cornea conditions
Corneal issues
Eye conditions
Eye discomfort
Eye diseases
Eye infections
Eye inflammation
Eye injuries
Eye irritation
Eye surface issues
Eyelid conditions
Eyelid issues
Pediatric eye conditions
Pupil issues
Tear duct issues
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 exams
- Bifocal or Multifocal Contact Lens Fitting
- Contact Lens Training
- Plano (Non-Prescription) Colored Contact Lens Exam
- Toric Contact Lens Fitting
Dry eye treatments
Examinations
- Comprehensive medical eye examination
- Diabetic Eye Exam
- DMV Vision Test
- Low Vision Assessment
- Pediatric Eye Exam
Eyelid care
Eyelid treatments
General exams
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
Minor procedures
Specialty lenses
Surgical evaluations
Tear duct procedures
Therapy
Urgent care
Vision correction
Procedures Most Often Billed to Medicare
8,148 services · 1,378 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
6,660 | More than most peers in Optometry |
| Photography of the retina | Treatment | 92250 |
399 | More than most peers in Optometry |
| Exam of visual field with extended testing | Treatment | 92083 |
133 | More than most peers in Optometry |
| Established patient complete exam of visual system | Treatment | 92014 |
90 | As often as other peers in Optometry |
| Imaging of retina | Treatment | 92134 |
69 | More often than most peers in Optometry |
| Imaging of optic nerve | Treatment | 92133 |
60 | More often than most peers in Optometry |
| Established patient problem focused exam of visual system | Treatment | 92012 |
33 | As often as other peers in Optometry |
| Measurement of retinal and optic nerve function | Treatment | 92273 |
12 | Less often than most peers in Optometry |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
277 | More than most peers in Optometry |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
237 | More than most peers in Optometry |
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.
Other optometry specialists at this location 3
Same specialty, same street address — most likely the same department or group.
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 optometry specialists in O Fallon 3
Same specialty, same city.
More connections — 16 related providers in 3 groups
Trained at University of Nebraska College of Medicine 1
Other providers in the same specialty who trained at the same institution.
Class of 2009 at University of Nebraska College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 7
Providers in IL who bill this service to Medicare most often.
Common questions
What does David D. Ernst specialize in?
David D. Ernst is an optometry in O Fallon, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is David D. Ernst located?
David D. Ernst is listed at 735 Insight Ave, O Fallon, IL 62269. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is David D. Ernst's phone number?
The number on file is (618) 628-2903. Contact the office directly to confirm availability and scheduling.
NPI registry
What is David D. Ernst's NPI number?
David D. Ernst's National Provider Identifier is 1306076518. 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 David D. Ernst train?
David D. Ernst attended University of Nebraska College of Medicine, graduating in 2009. This comes from the CMS National Downloadable File.
CMS public data
How long has David D. Ernst been practicing?
David D. Ernst has 17 years experience. Calculated from a graduation year of 2009, reported in the CMS National Downloadable File.
CMS public data
What does David D. Ernst do most often?
According to Medicare billing data, David D. Ernst performs procedures including removal of cataract with insertion of prosthetic lens; provides treatments such as photography of the retina and exam of visual field with extended testing, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has David D. Ernst confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by David D. Ernst. If this is you, claiming it is free.
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