Dr. Zach
Congratulations on achieving the Invisalign Advantage Premier Provider Elite status for 2010, 2011, and Super Elite Provider Status from 2012-2014! Because of your hard work & dedication to the Invisalign system, you are recognized as being among the top 1% of Invisalign practitioners in North America. THOMAS M. PRESCOTT
President & CEO, Align Technology Inc.
Inventor & manufacturer of the Invisalign system
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Watch our practice video & see why we're rated #1 in the DC area
Voted 50 Great Places to Work by Washingtonian Magazine Top Orthodontist by Washingtonian Magazine Top Orthodontist by Northern Virginia Magazine Top 40 Under 40 by Incisal Edge Magazine learn more >

watch our welcome video on youtube

VA's Top
Dr. Zach Casagrande is honored to continually be named top orthodontist!
Washingtonian Magazine Top Orthodontist Northern Virginia Magazine Top Orthodontist Washington Parent Favorite Docs Washingtonian Magazine Top Ortho
Northern Virginia Magazine Top Ortho
Washington Parent Favorite Docs
Incisal Edge Magazine Top 40 under 40
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Top Dentist

Incisal Edge's
Top 40 Under 40
Dr. Zach Casagrande named one of America's Best Young Dentists!
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Dr. Nelson
Dr. Zach Casagrande is thrilled to announce Dr. Kristin Nelson has joined the Northern Virginia Orthodontics team!

Dr. Nelson is highly trained in the latest orthodontic techniques and treatment advances for patients of all ages.
She graduated Magna Cum Laude from the University of Maryland Dental School & received her Orthodontic degree from the Medical College of Virginia. learn more >

dr. nelson

NVO Center
for Invisalign
The DC Area's ONLY all-adult Invisalign practice is attached to NVO
State-of-the-art facility offers adults a comfortable, private space Dr. Casagrande is an Invisalign Super Elite provider and has treated the most cases in the DC area Flexible scheduling & in-house 0% financing available learn more >


Meet Team NVO Our talented and professional staff has more than 100 years of combined orthodontic experience.
Highly trained staff proficient in advanced diagnostic tools & cutting edge technology Lab technician provides in-house appliances for faster turnaround We LOVE what we do! Voted 50 Great Places to Work by Washingtonian Magazine learn more >


Dr. Zach Casagrande, Dr. Kristin Nelson &

At Northern Virginia Orthodontics & Northern Virginia Orthodontics Center for Invisalign®, we treat each patient we see as an individual with a unique set of orthodontic needs and goals. We offer unparalleled orthodontic treatment to pediatric, adolescent, and adult patients, all in one location!

Proudly serving Northern Virginia and beyond — including Ashburn, Leesburg, Dulles, South Riding, Chantilly, Reston, out-of-state, and even international patients — Dr. Zach Casagrande & Dr. Kristin Nelson proudly offer comprehensive, individualized orthodontic care. This includes traditional braces, Damon® Smile, Damon Clear™, and Invisalign® and Invisalign Teen® clear aligners. We now offer accelerated orthodontics, which has been clinically proven to decrease treatment time by 38-50%. The NVO experience is unlike any other. We truly love our work, which you'll recognize from the first phone call to the completion of treatment.

Dr. Casagrande has been named an Invisalign Super Elite Provider, a title awarded to the top 1% of Invisalign specialists nationwide. He’s treated more Invisalign patients than any other single-doctor practice in Northern Virginia.  Repeatedly named a Top Orthodontist by Washingtonian Magazine, Northern Virginia Magazine and Washington Parent magazine, Dr. Casagrande is proud to be a native and resident of the DC area.

Contact our Ashburn orthodontic office today to schedule your complimentary smile analysis. We’re thrilled to offer the DC area’s ONLY all-adult Invisalign practice, the Northern Virginia Orthodontics Center for Invisalign adjacent to our pediatric practice. We designed this state-of-the-art facility to give our increasing adult patients a comfortable and private space for their treatment.

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  • These guys deserve 6 stars out of 5. Seriously, this guy and his team are good. Did you know that Dr. Casagrande is one of the leading Invisalign providers in the world? I think he's actually in the top 1% in the country!! I saw just as many adults in his office as I did kids, and everyone seemed to be all smiles. ~ David
  • The fact that my children look forward to each orthodontic appointment is very compelling. Dr. Casagrande and his staff have created a warm and welcoming environment and offer excellent care to their patients. ~ Ashley
  • With so many great choices in the area for a good orthodontist, we searched and searched for the best fit and are so glad we found Dr. Casagrande. The doctor is so wonderful, instantly giving us the feeling that our son is in good medical hands with a qualified and knowledgeable orthodontist. ~Daisy
  • Every month that I walk into the office, I'm greeted by wonderful smiles, lovely compliments, and funny stories; it is just a wonderful place to be. On top of that, they are professional, knowledgeable and have done wonders with my treatment, explaining it every step of the way and helping me get my desired results. ~Sonia
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