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

Dr. Gemmy Hannsun, MD

Individual provider Diagnostic Radiology Physician · NPI 1992120026

Dr. Gemmy Hannsun, MD is a Diagnostic Radiology in Orange, California. Graduated from University of California, Davis School of Medicine in 2016, 10 years ago. Practices with Uc Regents, a 103-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
10
Trained at
University of California, Davis School of Medicine
Licensed in
CA
In the registry since
2014
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

101 The City Dr S
Orange, CA 92868-3201
Phone: (714) 456-8888
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1100 N Tustin Ave Ste A, Santa Ana, CA 92705-3509 — (714) 643-5407

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A153743 (CA)

Record details

NPI number1992120026
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 26, 2014
Last updated in NPPESJanuary 20, 2026
Certification dateJanuary 20, 2026

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Uc Regents — 103 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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