Physician Profile
Robert C. Gunzenhauser, MD
Unclaimed ProfileAbout 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.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
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
- (909) 315-6891
- Email not available
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
Most searched conditions
- Cataracts
- Diabetic retinopathy
- Dry eye
- Glaucoma
- Macular degeneration
Cornea and external eye
- Blepharitis
- Corneal abrasion
- Corneal ulcer
- Keratoconus
- Pink eye
- Pterygium
Eyelid and tear drainage
- Blocked tear duct
- Chalazion
- Drooping eyelid
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
- Epiretinal membrane
- Retinal detachment
Eye injuries
- Foreign Object in Eye
Inflammation, neurologic, and orbit
- Thyroid eye disease
- Uveitis
Retina & vitreous
- Eye Floaters and Flashes
Procedures & services
Most searched procedures
- Cataract surgery
- Eye exam
- LASIK
- Retina surgery
Examination and imaging
- Corneal topography
- Fluorescein angiography
Cataract and lens
- Intraocular lens exchange
- YAG laser capsulotomy
Corneal procedures
- Amniotic Membrane Eye Graft
Eye diagnostics
- Optical Coherence Tomography Scan
Eye injuries
- Eye Scratch Laceration Repair
- Foreign Object Removal from Eye
Eyelid surgery
- Stye Removal
Eyelid, tear duct, and muscle
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Eyelid surgery
- Tear-duct bypass surgery
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
- Laser Floater Removal
Laser procedures
- Laser Treatment for Retinal Tear
Laser vision correction
- SMILE Eye Surgery
Refractive surgery
- Clear Lens Exchange
- Implantable Contact Lenses
Tear duct & Orbit
- Orbital Decompression Surgery
- Tear Duct Plugs
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. Guide.md cannot book appointments or pass on messages — please call the office directly.
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
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.