CHOC Providers

O’Loughlin, Sarah J. MD

Specialty: Pediatrics

Dr. Sarah O'Loughlin is a board-certified pediatrician and sees patients at CHOC Children's Hospital in Orange.


Ocen, Michele A. PhD

Specialty: Psychology
Appointments: 714-509-8481

Dr. Michele Ocen specializes in pediatric psychology and sees kids and teens at CHOC Children's Hospital in Orange.


Ohanian, Kirk L. MD

Specialty: Radiology
Appointments: 714-771-8360

Dr. Ohanian is board certified in radiology and treats kids and teens at CHOC Children's in Orange County.


Okada, Norichika A. MD

Specialty: Anesthesiology
Appointments: 714-560-1580

Dr. Okada is a board certified anesthesiologist who provides care for infants and children undergoing anesthesia at CHOC Children's.


Okawachi, David H. DDS

Specialty: Dentistry
Appointments: 714-635-1170

Dr. David Okawachi is a pediatric dentist who treats kids and teens in Orange County.


Olaya, Joffre E. MD

Specialty: Neurosurgery
Appointments: 714-509-7070

Dr. Joffre Olaya specializes in neurosurgery. He sees kids and teens at CHOC Children's Hospital in Orange and CHOC Children's at Mission Hospital.


Olaya, Windy A. MD

Specialty: Plastic Surgery
Appointments: 714-564-9225

Dr. Olaya is a board certified pediatric plastic surgeon who treats kids and adolescents at CHOC Children's.


Omori, Keiichiro MD

Specialty: Pediatrics

Dr. Keiichiro Omori is a board-certified pediatrician and sees patients at CHOC Children's Hospital in Orange.


Ontiveros, Eric B. MD

Specialty: Anesthesiology
Appointments: 714-560-1580

Dr. Ontiveros is a board certified anesthesiologist who provides care for infants and children undergoing anesthesia at CHOC Children's.


Openshaw, Kurt L. MD

Specialties: Radiology, Vascular & Interventional Radiology
Appointments: 714-771-8171

Dr. Openshaw is board certified in radiology and vascular/interventional radiology at CHOC Children's in Orange.


Openshaw, Lori L. MD

Specialty: Pediatrics
Appointments: 949-951-5437

Dr. Lori L Openshaw is a board certified pediatrician and sees patients at CHOC Children's at Mission Hospital in Orange, CA.


Otanez, Oscar MD

Specialty: Pathology
Appointments: 949-364-7710

Dr. Otanez is a board certified pediatric pathologist who identifies diseases in kids and adolescents at CHOC Children's.


Ounjian, Melinda MD

Specialty: Anesthesiology
Appointments: 949-600-7864

Dr. Ounjian is a board certified anesthesiologist who provides care for infants and children undergoing anesthesia at CHOC Children's.


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UC Irvine

CHOC Children's is affiliated with the UC Irvine School of Medicine