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Edit this profileAt a glance
- 1298 W 7Th St, Upland, CA 91786
About Dr. Gunzenhauser
Robert C. Gunzenhauser, MD practices ophthalmology in Upland, CA. Robert is a 2020 graduate of Wake Forest University School of Medicine. Robert is also listed as specializing in ophthalmology — glaucoma. Medicare claims data shows Robert provided 205 services to 183 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more. The provider's National Provider Identifier (NPI) is 1457988065.
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
- (909) 315-6891
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1298 W 7TH ST
Upland, CA 91786
Conditions Commonly Evaluated or Treated
Within Ophthalmology 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
Eye injury and cancer
Inflammation, neurologic, and orbit
Most searched conditions
Cornea and external eye
Eyelid and tear drainage
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
Eye injuries
Retina & vitreous
Procedures & services
Cataract and lens
- Cataract surgery with lens implant
- Laser-assisted cataract surgery
- Intraocular lens exchange
- YAG laser capsulotomy
Cornea and refractive
Emergency and minor
- Corneal rust-ring removal
- Removal of an eye foreign body
- Repair of an eye or eyelid laceration
- Repair of ruptured globe
Examination and imaging
- Eye ultrasound
- Slit-lamp examination
- Visual-field testing
- Corneal topography
- Fluorescein angiography
Eyelid, tear duct, and muscle
- Chalazion removal
- Ectropion repair
- Eyelid surgery
- Tear-duct probing
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Tear-duct bypass surgery
Glaucoma
- Cyclophotocoagulation
- Trabeculectomy
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Retina
Most searched procedures
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
Procedures Most Often Billed to Medicare
205 services · 183 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Exam of the internal drainage system of eye | Treatment | 92020 |
15 | Less often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
74 | Less often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
63 | Less often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
53 | More often than most peers in Ophthalmology |
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 eye doctors at this location 1
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 eye doctors in Upland 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Wake Forest University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2020 at Wake Forest University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Exam of the internal drainage system of eye 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Gunzenhauser?
Dr. Gunzenhauser is an eye doctor in Upland, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
What is Dr. Gunzenhauser's address?
Dr. Gunzenhauser is listed at 1298 W 7Th St, Upland, CA 91786. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Gunzenhauser?
The number on file is (909) 315-6891. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Gunzenhauser?
Dr. Gunzenhauser's National Provider Identifier is 1457988065. 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 Dr. Gunzenhauser train?
Dr. Gunzenhauser attended Wake Forest University School of Medicine, graduating in 2020. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gunzenhauser have?
Dr. Gunzenhauser has 6 years experience. Calculated from a graduation year of 2020, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Gunzenhauser perform?
According to Medicare billing data, Dr. Gunzenhauser provides treatments such as exam of the internal drainage system of eye, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Gunzenhauser's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gunzenhauser. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.