Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Robert Chooljian Gunzenhauser, MD

Individual provider Glaucoma Specialist (Ophthalmology) Physician · NPI 1457988065

Dr. Robert Chooljian Gunzenhauser, MD is an Ophthalmology in Upland, California. Graduated from Wake Forest University School of Medicine in 2020, 6 years ago. Practices with Marc H Shomer MD PHD Inc, a 2-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
6
Trained at
Wake Forest University School of Medicine
Licensed in
CA
In the registry since
2020
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1298 W 7th St
Upland, CA 91786-7035
Phone: (909) 315-6891
Fax: (909) 946-3937
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence A189179 (CA)
Glaucoma Specialist (Ophthalmology) Physician Taxonomy 207WX0009X · Licence A189179 (CA)

Record details

NPI number1457988065
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 24, 2020
Last updated in NPPESJuly 21, 2026
Certification dateJuly 21, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolWAKE FOREST UNIVERSITY SCHOOL OF MEDICINE
Graduated 2020 (6 years in practice)
Group practice Marc H Shomer Md Phd Inc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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