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

Khai S. Chang, MD

*Please contact clinic directly to confirm appointment availability.

*Please contact clinic directly to confirm appointment availability.

Specialty

Internal Medicine

Languages

Hindi, Chinese, English

Seeing patients at

  • Gender

    Male

    Licenses

    FL, ME75650

    Employed or contracted

    Contracted

    Network Name

    Optum Florida

    PCP ID

    17176

    NPI

    1881665222

    Hospital affiliations

    Leesburg Regional Medical Center

  • Insurance accepted

    This may not reflect all insurance accepted by the provider and is for informational purposes only.

    • United
    • WellCare

  • Medical School

    • Armed Forces Medical College

    Residency

    • Easton Hospital

      Internal Medicine

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