Welcome to Bioassays 2023!

Bioassays: Scientific Approaches & Regulatory Strategies is a premier bioassay symposium that presents a truly unique opportunity for attendees to interact with key industry thought leaders and discuss topics such as current perspectives, strategies and technologies used for bioassays. This symposium promises to maintain the tradition of high-quality case studies and scientific discussion that enables an additional focus on the technical and regulatory details of each topic. Plan on joining us for what will surely be an informative conference on the current thinking, strategies, lessons learned, development and standardization of methods and technologies used for bioassays.


View Scientific Program

In-Person Attendees

Presentations and workshops will be held at the Gaithersburg Marriott Washingtonian Center in Gaithersburg, MD. Symposium registration includes all sessions on April 18-19, 2023, continental breakfast, lunch, and networking breaks on each of these days, access to the Exhibit & Poster Hall, Networking Reception, as well as access to the digital schedule which features the final program, abstracts, and presenters' slides. Registration for the workshop on Monday, April 17, 2023 is an additional cost not included in the conference registration fee. Additional information on the new 2023 workshop will be available soon. In-person registration will close March 31, 2023.

Registration Fees      Register for In-Person


New to CASSS? First-time attendees are eligible to receive a 23% discount on registration. Promo code = NewIn23

Flash Sale! Add the Potency Assays Workshop to your registration this week and receive a 25% discount off the workshop price! This offer expires Friday, March 24, 2023. Promo code = BIO23_FLASH25

Contact Program Manager Julie Harris for more information on the available registration rate promotions. 


The Bioassays 2023 Scientific Organizing Committee invites industry, academic, and regulatory professionals to submit abstracts addressing current perspectives, strategies, and technologies used for bioassays for both oral and poster presentations.

The deadline to be considered for an oral presentation was February 24, 2023
The deadline to be considered for a poster presentation was March 17, 2023

If you have additional questions, please contact Julie Harris, Symposium Manager, or call the CASSS office at 510-428-0740.

COVID Protocols

CASSS is committed to protecting its attendees, participants, and staff members to the highest degree possible when attending our conferences. To ensure we provide a safe environment, CASSS strongly encourages COVID-19 vaccinations, and all other routine vaccinations to protect you from infectious diseases, serious illness, and hospitalization. CASSS will follow guidances established by the facility hosting the conference and/or local and state health authorities in which the conference is located.

For more information and important local guidelines, visit CASSS' COVID Protocol

Hotel Information

Gaithersburg Marriott Washingtonian Center
9751 Washingtonian Boulevard
Gaithersburg, MD 20878 USA
Telephone: 301-590-0044
Website: Gaithersburg Marriott Washingtonian Center

The Gaithersburg Marriott Washingtonian Center is conveniently situated in the suburbs of Washington, DC. It is located 35 miles from Washington, Dulles (IAD) airport, 30 miles from Ronald Reagan Washington National (DCA) airport and 50 miles from Baltimore/Washington International Thurgood Marshall (BWI) airport. Take a short walk to Rio Lakefront for shopping, dining and entertainment or dine in at the on-site restaurant. The hotel has additional features including a business and fitness center with enhanced cleaning measures.


A room block is reserved for symposium delegates at the special group rate of $209 USD for a single or double room (plus 15% occupancy tax). The deadline to reserve your accommodations is Friday, March 24, 2023. The room block will most likely be filled before the deadline; we recommend that attendees book their hotel accommodations well before the deadline to secure this rate. The Gaithersburg Marriott requires a deposit of one night's rate plus tax via credit card to guarantee your reservation. In the event of a cancellation, the hotel requires 72 hours notice to receive a full refund.

Make Reservations

By staying at the host hotel, you help CASSS meet its contractual obligations and keep future registration fees reasonable. Please take this into consideration when making your accommodation decisions.

Program Partners


Past Event Videos

  • Bioassays 2020 Keynote: Steven Kozlowski, CDER, FDA

  • Bioassays 2021 Keynote: Anthony Mire Sluis, ‚ÄčAstraZeneca

  • Bioassays 2022 Keynote: Marjorie Shapiro, CDER, FDA

  • CASSS: Knowledge Sharing Interviews