Align Technology to Present at U.S. Bancorp Piper Jaffray Conference Santa Clara, Calif. – January 23, 2003 - Align Technology, Inc. (Nasdaq: ALGN) announced today that Thomas M. Prescott, President and CEO, is scheduled to speak at the U.S. Bancorp Piper Jaffray Health Care Conference on Thursday January 30, 2003 at 12:30 pm EST.

A live webcast of the presentation will be available in real time at Align’s website at www.invisalign.com under the Corporate Information/Investor Relations/Webcasts section. An archived replay will remain at the website until February 12, 2003.

About Align Technology, Inc.

Align Technology designs, manufactures and markets Invisalign, a proprietary method for treating malocclusion, or the misalignment of teeth. Invisalign corrects malocclusion using a series of clear, comfortable and removable appliances that gently move teeth to a desired final position. Because it does not rely on the use of metal or ceramic brackets and wires, Invisalign significantly reduces aesthetic and other limitations associated with braces. Invisalign is appropriate for treating adults and older teens. Align Technology was founded in March 1997 and received FDA clearance to market Invisalign in 1998.

To learn more about Invisalign or to find a certified Invisalign doctor, please visit www.invisalign.com or call 1-800-INVISIBLE.