Health care

We provide affordable and personalized care

How can we help?

Helpful links

Understanding coughs: Types, causes and treatments

More articles

Financial

Accounts to help you save and pay for health care expenses

How can we help?

Helpful links

  • Resources

    Find contribution limits, savings tools, calculators and eligible expenses

  • Account support

    Find contact information and frequently asked questions

Tax season resources

Get ready for HSA tax season

If you used an HSA this year, the HSA Tax Center offers general information about contributions, eligible expenses and commonly used tax forms — all in one place.

Visit the HSA Tax Center

Pharmacy

We make it easy to get medications you need, when and where you need them

How can we help?

Helpful links

  • Optum Rx

    For people with pharmacy insurance benefits through Optum Rx

  • Track orders

    Track your home delivery and specialty order

  • Pharmacy support

    Find contact information and answers to frequently asked questions

Mobile app

Optum Rx on the go

Request refills, track order status, manage billing information and much more.

Download on the App StoreGet it on Google Play

Delma Julieta Nieves, MD

Please contact to confirm appointment availability

Please contact to confirm appointment availability

Specialty

Pediatric Infectious Diseases, Pediatric Registered Nurse

Languages

English

Seeing patients at

  • Gender

    Female

    Board certifications

    American Board of Pediatrics

    Licenses

    CA, A87032

    Employed or contracted

    Contracted

    Network Name

    Optum Care Network California

    NPI

    1083894315

    Hospital affiliations

    Children's Hospital Orange County,CHOC Children's at Mission Hospital,UCI Health - Fountain Valley

  • Medical School

    • University of Washington School of Medicine

      1998

    Residency

    • Children's Hosp of Orange Cnty

      2003

    Internship

    • Children's Hosp of Orange Cnty

      2002

    Fellowship

    • Mattel Children's Hospital

      2005

© 2026 Optum, Inc. All rights reserved. Stock photos used.