Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Stephen B Prepas, MD

Individual provider Ophthalmology Physician · NPI 1023103660

Dr. Stephen B Prepas, MD practises Ophthalmology in Irvine, California. Graduated from University of California, Irvine, California College of Medicine in 1975, 51 years ago. Practices with Regents of the University of California, a 47-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
51
Trained at
University of California, Irvine, California College of Medicine
Licensed in
CA
In the registry since
2006
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

850 Health Sciences Rd
Irvine, CA 92617-3058
Phone: (949) 824-2020
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 360 San Miguel, Newport Beach, CA 92660 — (949) 644-7026

Specialties & licences

Pediatric Ophthalmology and Strabismus Specialist Physician (primary) Taxonomy 207WX0110X · Licence G32851 (CA)
Ophthalmology Physician Taxonomy 207W00000X · Licence G32851 (CA)

Record details

NPI number1023103660
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 3, 2006
Last updated in NPPESJanuary 23, 2025
Certification dateJanuary 23, 2025

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE
Graduated 1975 (51 years in practice)
Group practice Regents Of The University Of California — 47 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients43
Services billed 80 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Uci Health-Orange Hospital · Orange, CA

Colleagues at Regents of the University of California

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 47 clinicians in the practice; 12 are shown here.

Other providers in Irvine