Stephen B. Prepas, M.D.
Pediatric Ophthalmology and Strabismus Specialist Physician · Irvine, CA
Stephen B. Prepas, M.D. is a pediatric ophthalmology and strabismus specialist physician with a practice address in Irvine, California, and NPI 1023103660, issued on Oct 3, 2006. Check the license (California G32851, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen B. Prepas
- Credential
- M.D.
- Primary taxonomy
- Pediatric Ophthalmology and Strabismus Specialist Physician 207WX0110X
- License number
- G32851 CA
Self-reported in NPPES; status is on the state search - Practice location
- 850 Health Sciences RD, Irvine, CA 92617
- Phone
- (949) 824-2020
- Enumerated
- Oct 3, 2006
- Record last updated
- Jan 23, 2025
- Medicaid ID
- GR0044731 CA
- Medicare enrollment
- Enrolled (PECOS I20111129000153); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1975
- Entity
- Type 1 · individual
8 nearest pediatric ophthalmology and strabismus specialist physician records → All 31 in California → Look up another NPI →
Also registered at 850 Health Sciences RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashraf Ahmad, M.D.Ophthalmology Physician1689108425
- Yosur AlsulaimanOphthalmology Physician1457204661
- Andrew Browne, M.D., PH.D.Retina Specialist (Ophthalmology) Physician1154615383
- Teresa Chen, MDOphthalmology Physician1679034367
- Katherine Chuang, MDOphthalmology Physician1356831929
- Robert Crow, MDNeuro-ophthalmology Physician1285646398
Verify Stephen B. Prepas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G32851Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average pediatric ophthalmology and strabismus specialist physician in 2024
38 Medicare Part D claims, against an average of 111 among the 150 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Latanoprost13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen B. Prepas among 31 pediatric ophthalmology and strabismus specialist physician records in California
Stephen B. Prepas, M.D. is one of 31 pediatric ophthalmology and strabismus specialist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1975 · median 2006 among the 23 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0110X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Ophthalmology and Strabismus Specialist Physician providers in California
There are 31 pediatric ophthalmology and strabismus specialist physician records in California.
All 31 in California → Every provider in Irvine → Pediatric Ophthalmology and Strabismus Specialist Physician nationwide →
The 8 pediatric ophthalmology and strabismus specialist physician records with the nearest ZIP codes
- Charlotte Gore, M.D.Irvine, CA 926171336460583
- Donny Suh, MDIrvine, CA 926171295727022
- Jennifer Dunbar, M.D.San Bernardino, CA 924081730104944
- Ajay Manchandia, MDOrange, CA 928681720243082
- Leila Khazaeni, M.D.Loma Linda, CA 923541316979917
- Scott McClatchey, M.D.San Diego, CA 921341932189164
- Mark Silverberg, M.D.Santa Barbara, CA 931101366544488
- Mansoor Movaghar, MDSan Diego, CA 921231497792220
Common questions
What is Stephen B. Prepas, M.D.'s NPI number?
Stephen B. Prepas, M.D.'s National Provider Identifier (NPI) is 1023103660, issued on Oct 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen B. Prepas, M.D. located?
The NPPES record lists a practice address at 850 Health Sciences RD, Irvine, CA, 92617. Phone: (949) 824-2020. Providers update this record themselves, so call before visiting.
How can I verify Stephen B. Prepas, M.D.'s license?
NPPES lists California license number G32851, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephen B. Prepas, M.D. prescribe under Medicare Part D?
In 2024, Stephen B. Prepas, M.D. had 38 Medicare Part D claims; the average among pediatric ophthalmology and strabismus specialist physician prescribers was 111. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.