Now pick the second doctor

Kenneth H Chang Surgery · Oakland, CA

Second doctor

GlassScript

About How we compute things Common questions Watch a doctor Watch a specialty or state Compare two doctors

Browse

By specialty By state By company By drug or device Is $X typical? The big picture

For professionals

Data API Embed a badge Monitoring

Trust

Accuracy & corrections For clinicians Privacy Terms

Data: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Payments are legal and often routine: context on every page. GlassScript is independent and is not affiliated with, endorsed by, or sponsored by CMS or HHS. Not medical, legal, or financial advice. Official source ↗