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

Barth Bishop Riedel, MD

Please contact to confirm appointment availability

Optum Provider

Please contact to confirm appointment availability

Specialty

Orthopaedic Surgery, Orthopaedic Hand Surgery

Languages

English

Seeing patients at

  • Gender

    Male

    Board certifications

    American Board of Orthopaedic Surgery

    Licenses

    CA, A98328

    Employed or contracted

    Employed

    Network Name

    OptumCare HealthCarePartners California

    NPI

    1558574491

    Hospital affiliations

    Pomo Valley Hospital Medical Center,Loma Linda University Medical Center

  • Medical School

    • Loma Linda University

      2001

    Residency

    • Loma Linda University

      2006

    Internship

    • Loma Linda University

      2005

    Fellowship

    • University of Southern California

      2010

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