Important Reminder
onPeak is the only hotel provider endorsed by ACS Clinical Congress 2025. If you are contacted by NTA Travel or any other 3rd party Travel/Housing Company – please ignore them as onPeak is our Official provider. Entering into financial agreements with these companies can have costly consequences and are not protected by event management.
Clinical Congress 2025 Attendees can now book their Chicago hotel reservations at discounted nightly rates for Clinical Congress 2025 via onPeak – the only official hotel provider for the Clinical Congress. Every reservation made through onPeak supports the College's ability to provide quality education in appealing destinations.
Book today for no upfront cost and make changes or cancel your reservation without penalty (per the hotel’s cancellation policy). Plus, Attendees who make reservations for next year’s meeting will be entered into a drawing for a free suite upgrade at Clinical Congress 2026.
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Benefits of Booking with onPeak
Pay Delay
Ease your commitment — book now, pay later.
No Fees
Escape from booking, change and cancellation fees.
Support
We're here for you before, during, and after the event.
Flexibility
Plans change. onPeak lets you make adjustments without penalty.
Group Reservations
Easily manage hotel reservations with onPeak's group tools.
Hotel Rewards Points
Get credit for your hotel loyalty program.
Policies
Group Reservations & Exhibitor Priority Points
Groups in need of 10+ rooms are required to complete the group reservation request form, found via the button above. Hotel assignments will be based on the date the form is submitted, hotel availability, block size, meeting space needs, and exhibitor's priority preference. Any exhibitor circumventing the ACS hotel block will be assessed 10 penalty points.
The total room nights requested on your block may be reduced by 20% without penalty up until Friday, July 25, 2025. Should the actual room nights utilized drop below 80% of the total room nights held after this date, your company agrees to pay the room rate plus applicable taxes for each room night that is not used by your company in excess of the allowable slippage. If payment is due under this provision due to actualized slippage, an invoice will be sent to your company, and payment will be required no later than 30 days after receipt of the invoice.
