• King of Prussia


    491 Allendale Rd.
    Suite 312
    King of Prussia, PA 19406

  • Collegeville


    555 Second Ave.
    Collegeville, PA 19426

Welcome to the practice of Dr. Adam Weiss and Dr. May O'Keeffe!

Thank you for your interest in the orthodontic practice of Dr. Adam Weiss and Dr. May O'Keeffe, a longtime leader in your orthodontic care community. We provide patient-centered care for all ages, educating patients and families about the options available, including early treatment when indicated, limited treatment as well as comprehensive treatment.

Dr. Adam Weiss and Dr. May O'Keeffe are experts in their field and will gladly explain your options. We offer the latest technologies, including conventional children's and/or adult braces, SureSmile®Invisalign® and Invisalign® Teen! We encourage you to take advantage of our complimentary initial visit to learn which approach is right for you or your child. We look forward to meeting you soon!

Located in King of Prussia and Collegeville, PA, we also provide orthodontic services to Audubon, Blue Bell, Bridgeport, Bryn Mawr, Chesterbrook, Conshohocken, Devon, Eagleville, Jeffersonville, Kimberton, Limerick, Norristown, Oaks, Paoli, Phoenixville, Plymouth Meeting, Pottstown, Radnor, Royersford, Schwenksville, Skippack, Spring City, Trappe, Trooper, Valley Forge, and Wayne, PA.

Virtual Office Tour: Collegeville

Virtual Office Tour: King of Prussia

Top Dentist   InvisalignElite2016

Accelerated Orthodontics Sleep Dentistry




We are proud to utilize SureSmile technology! Through 3-D imaging and customizing each patient’s archwires, SureSmile gives Drs. Weiss and O’Keeffe more control to precisely configure your treatment plan.


A modern alternative to traditional metal braces, the Invisalign System straightens your teeth using a series of clear, customized, removable aligners. No one will notice you are straightening your teeth unless you tell them!

Snoring / Sleep Apnea

Did you know that loud, habitual snoring could be a sign of a serious condition called obstructive sleep apnea (OSA)? Dr. Weiss can effectively treat mild to moderate cases of OSA using a customized oral appliance.