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  • King of Prussia


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

  • Collegeville


    555 Second Ave.
    Collegeville, PA 19426

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

Thank you for your interest in the orthodontic practices of Dr. Adam Weiss and Dr. May O'Keeffe, respected providers in the orthodontic care community.  Our goal is to exceed your expectations in all interactions with our practice.  We offer patient-centered care for any age, educating patients and families about individualized treatment options available to them, including early treatment when indicated, limited treatment as well as comprehensive treatment.  Our state-of-the-art offices utilize the latest in technology for efficient treatment, providing both fixed and clear aligner therapies. With our digital scanner, we have reduced the need for mouth impressions.  Our treatment areas are designed to offer more privacy than many Orthodontic practices who use an "open bay" layout.  Please take a virtual tour below of the office closest to you!!  We are pleased to announce Dr. O'Keeffe taking ownership of the King of Prussia office location as O'Keeffe Orthodontics.

Dr. Adam Weiss and Dr. May O'Keeffe are experts in their field and will gladly explain your options at a complimentary initial visit. We offer the latest technologies, including conventional metal braces and/or  clear braces,, Invisalign® and Invisalign® Teen!  We also have non-invasive accelerated Orthodontic options with the Acceledent system.  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  Collegeville, and King of Prussia 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

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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!

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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.