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Edit this profileAt a glance
- 895 Trancas St, Napa, CA 94558
About Dr. Wingren
Gregory S. Wingren, O.D. is an optometrist practicing in Napa, CA. According to Medicare claims data, Gregory cared for 48 Medicare patients across 48 services. The services billed most often include established patient complete exam of visual system and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. This provider record is associated with NPI 1164857140.
Factual summary compiled by Guide.md from public records; not written by this provider.
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
- (707) 252-2020
- Email not available
Practice Locations
895 TRANCAS ST
Napa, CA 94558
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
48 services · 48 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient complete exam of visual system | Treatment | 92014 |
25 | Less often than most 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 |
23 | 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.
Other optometrists at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 16 related providers in 2 groups
Other optometrists in Napa 8
Same specialty, same city.
Also performs Established patient complete exam of visual system 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Gregory S. Wingren specialize in?
Gregory S. Wingren is an optometrist in Napa, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Gregory S. Wingren located?
Gregory S. Wingren is listed at 895 Trancas St, Napa, CA 94558. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gregory S. Wingren's phone number?
The number on file is (707) 252-2020. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Gregory S. Wingren's NPI number?
Gregory S. Wingren's National Provider Identifier is 1164857140. 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
How long has Gregory S. Wingren been practicing?
Gregory S. Wingren has 13+ years experience. Registered with an NPI since 2013. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Gregory S. Wingren do most often?
According to Medicare billing data, Gregory S. Wingren provides treatments such as established patient complete exam of visual system, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Gregory S. Wingren confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory S. Wingren. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.