• Skip to primary navigation
  • Skip to main content
  • Skip to footer
Children's Hospital of Orange County

Children's Hospital of Orange County

Donate
  • I Want To…
    • Find a Doctor
    • Make an Appointment
    • Access CHOC Patient Portal
    • Explore Career Opporunities
    • Estimate My Charges
    • Pay My Bill
    • Request Medical Records
    • Download Vaccine Records
    • Refer a Patient
    • Visit a Patient
    • Connect
    • Volunteer
    • Help
    • I Want To…
      • Find a Doctor
      • Make an Appointment
      • Access CHOC Patient Portal
      • Explore Career Opporunities
      • Estimate My Charges
      • Pay My Bill
      • Request Medical Records
      • Download Vaccine Records
      • Refer a Patient
      • Visit a Patient
      • Connect
      • Volunteer
      • Help
  • Services
    • Primary Care
    • Specialty Care
    • Mental Health
    • Conditions Library
    • All CHOC Services
  • Patients & Families
    • Make an Appointment
    • MyCHOC Patient Portal
    • Pay Your Bill
    • Request Medical Records
    • CHOC Health Hub
  • For Medical Professionals
    • Refer a Patient
    • Care Guidelines
    • Physician Relations
    • Continuing Medical Education
    • Residency and Training Programs
  • Research & Innovation
    • Research Institute
    • Medical Innovation Institute (Mi4)
  • Locations
    • Emergency Departments
    • CHOC Hospital
    • CHOC at Mission Hospital
    • Urgent Care
    • Primary Care Offices
    • Specialty Centers
    • All CHOC Locations
  • About
    • Main Operator: 714-997-3000
    • Customer Care: 714-509-3200
    • Nurse Advice: 1-844-GET-CHOC
    • Contact Us
    • CHOC Foundation
    • Events
    • News Media Resources
  • Find a Doctor
  • Careers
  • Log In
    • MyCHOC
    • MyChart (CHOC Mission)
  • Donate

Questions about your child's health? Call our free 24/7 Nurse Advice Line 844-GET-CHOC.

Home » Medical Staff » Neonatology » Hillyard, Robert L. MD

Dr. Robert L. Hillyard, Neonatology

Robert Hillyard

Robert Hillyard, MD

is on staff at
CHOC Hospital Orange | CHOC Mission Hospital

Office Phone:
714-509-4373

Specialty:
Neonatology

Board Certified:
Neonatology

Neonatology Referrals

Physicians can refer patients to CHOC through our eCeptionist Referral Portal.

Refer a Patient

Dr. Hillyard attended medical school at the University of California, San Francisco. He completed both his internship and residency at Harbor-UCLA Medical Center. He performed a Neonatal fellowship at Harbor-UCLA Medical Center. He is affiliated with the American Academy of Pediatrics. His honors include the Munzer family Award for excellence in research and teaching. Dr. Hillyard is board certified in Neonatal-Perinatal Medicine. His philosophy of care is having the privilege to be trusted with the care of your child. His special interests include a wide range of critically ill newborns including those with extreme prematurely, congenital heart disease and severe pulmonary hypertension. He has produced both basic science and clinical research, and is actively teaching in the CHOC residency and fellowship programs.

Locations

CHOC Hospital
1201 W La Veta
Orange, CA 92868

Hoag Memorial Presbyterian Hospital
One Hoag Dr.
Newport Beach, California 92663

Education

  • Medical School
    UCSF School of Medicine, San Francisco, CA
  • Neonatology Fellowship
    Harbor-UCLA Medical Center, Torrance, CA
  • Pediatrics Residency
    Harbor-UCLA Medical Center, Torrance, CA

Academic Appointments

  • Assistant Clinical Professor
    Geffen School of Medicine, UCLA

Administrative Appointments

  • Neonatology, CHOC Specialists

Lectures and Presentations

Escalating Complexity of Maternal and Neonatal Care

Our neonatologists commonly treat the following conditions in newborns and babies:

  • Apnea
  • Bradycardia
  • Bronchopulmonary dysplasia (BPD)
  • Coarctation of the aorta
  • Gastroschisis
  • Heart valve abnormalities
  • Hypoglycemia
  • Intrauterine growth restriction (IUGR)
  • Intraventricular hemorrhage (IVH)
  • Jaundice
  • Macrosomia
  • Necrotizing enterocolitis (NEC)
  • Patent ductus arteriosus (PDA)
  • Persistent pulmonary hypertension of the newborn (PPHN)
  • Pneumonia
  • Respiratory distress syndrome (RDS)
  • Retinopathy of prematurity (ROP)
  • Sepsis
  • Septal defects
  • Tetralogy of Fallot
  • Transposition of the great arteries
  • Trouble keeping warm

Health Stories

Meet Henry and Hugo: The youngest infants to graduate from CHOC’s NICU and Small Baby Unit 

Neonatology / NICU

Meet Henry and Hugo: The youngest infants to graduate from CHOC’s NICU and Small Baby Unit 

Thanks to advanced and expert care from CHOC’s Small Baby Unit, Henry and Hugo are thriving after being born at 22 weeks gestation.

CHOC Logo Icon CHOC Health

Large chest mass poses big challenges: Freddy’s NICU story

Birth Defects

Large chest mass poses big challenges: Freddy’s NICU story

CHOC’s multidisciplinary approach to treating bronchopulmonary sequestration (BPS), a rare birth defect, gave infant Freddy a new chance.

CHOC Logo Icon CHOC Health

1201 W La Veta Ave
Orange, CA 92868

(714) 997-3000

CHOC is affiiliated with

CHOC Links

  • Contact Us
  • Directions
  • Locations
  • News Media Resources
  • Careers
  • Giving

I Want To…

  • Find a Doctor
  • Refer a Patient
  • Pay My Bill
  • Request Medical Records
  • MyCHOC Patient Portal
  • Volunteer

Legal

  • Patient Rights and Responsibilities
  • Notice of Privacy Practices
  • Notice of Nondiscrimination
  • Language Assistance
  • Pricing Transparency
  • Privacy Policy
Choco Wave
  • US News and World Report
  • The Joint Commission
  • California Awards
  • Magnet Recognized
  • Charity Navigator

Language Assistance:

  • Español
  • 繁體中文
  • Tiếng Việt
  • Tagalog
  • 한국어
  • Հայերեն
  • فارسی
  • Русский
  • 日本語
  • العربية
  • ਪੰਜਾਬੀ
  • ខ្មែរ
  • Hmoob
  • हिंदी
  • ภาษาไทย
  • Facebook
  • X
  • Pinterest
  • Instagram
  • LinkedIn
  • YouTube

©2025 CHOC, A 501(c)(3) Organization