Are you John W. Barnhart, O.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 4620 Mahoning Ave Nw, Warren, OH 44483
About Dr. Barnhart
John W. Barnhart, O.D. is an optometrist based in Warren, OH. John is a 1991 graduate of Ohio State University - College of Optometry. Medicare claims data shows John provided 413 services to 370 patients. The services billed most often include established patient complete exam of visual system, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and imaging of optic nerve. The provider's National Provider Identifier (NPI) is 1407975113.
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
- (330) 847-9093
- Email not available
Practice Locations
4620 MAHONING AVE NW
Warren, OH 44483
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
413 services · 370 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient complete exam of visual system | Treatment | 92014 |
128 | More often than most peers in Optometrist |
| Imaging of optic nerve | Treatment | 92133 |
43 | As often as other peers in Optometrist |
| Exam of visual field with extended testing | Treatment | 92083 |
36 | As often as other peers in Optometrist |
| Photography of the retina | Treatment | 92250 |
27 | Less often than most peers in Optometrist |
| Imaging of retina | Treatment | 92134 |
25 | As often as other peers in Optometrist |
| New patient complete exam of visual system | Treatment | 92004 |
23 | As often as other peers in Optometrist |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
81 | More often than most peers in Optometrist |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
32 | As often as other peers in Optometrist |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
18 | 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 Warren 8
Same specialty, same city.
Trained at Ohio State University - College 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 1991 at Ohio State University - College of Optometry 8
Providers who graduated from the same medical school in the same year.
Also performs Established patient complete exam of visual system 8
Providers in OH who bill this service to Medicare most often.
Common questions
What kind of doctor is John W. Barnhart?
John W. Barnhart is an optometrist in Warren, OH. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is John W. Barnhart's address?
John W. Barnhart is listed at 4620 Mahoning Ave Nw, Warren, OH 44483. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John W. Barnhart?
The number on file is (330) 847-9093. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for John W. Barnhart?
John W. Barnhart's National Provider Identifier is 1407975113. 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 John W. Barnhart train?
John W. Barnhart attended Ohio State University - College of Optometry, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How much experience does John W. Barnhart have?
John W. Barnhart has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What procedures does John W. Barnhart perform?
According to Medicare billing data, John W. Barnhart provides treatments such as established patient complete exam of visual system and imaging of optic nerve, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is John W. Barnhart's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John W. Barnhart. If this is you, claiming it is free.
Guide.md
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