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

Oscar Chen, MD, MS

Individual provider Ophthalmology Physician · NPI 1598329989

Oscar Chen, MD, MS is an Ophthalmology in Orange, California. Graduated from Rush Medical College of Rush University in 2021, 5 years ago. Practices with Regents of the University of California, a 47-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California and Illinois.

Years since qualifying
5
Trained at
Rush Medical College of Rush University
Licensed in
CA, IL
In the registry since
2019
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

101 The City Dr S
Orange, CA 92868-3201
Phone: (949) 824-7105
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 600 S Paulina St Ste 403, Chicago, IL 60612-3806 — (312) 942-7100
  • 1725 W Harrison St Ste 906, Chicago, IL 60612-3848 — (312) 942-5000

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 201127 (CA)
Ophthalmology Physician Taxonomy 207W00000X · Licence 125077452 (IL)

Record details

NPI number1598329989
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MS
Sole proprietorYes
NPI enumeratedMay 1, 2019
Last updated in NPPESJune 4, 2025
Certification dateJune 4, 2025
Mailing address101 The City Dr S, Orange, CA 92868-3201

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 2021 (5 years in practice)
Group practice Regents Of The University Of California — 47 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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