Ons Expiration Calendar 2025. Ons congress is the premier event for oncology nurses, offering a unique opportunity to learn about the latest developments in the field. Be a part of oncology nursing’s rich history and inspiring future at the 50th annual ons congress!

View or download over a year’s worth of listing and expiration dates across cme group’s benchmark options, including yet to be listed weekly expiries (highlighted in yellow). Ons congress is the premier event for oncology nurses, offering a unique opportunity to learn about the latest developments in the field.