Northern Horizon Dental Innisfil

About Us

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At Northern Horizon Dental Innisfil, we are committed to providing exceptional dental care to all of our patients. We are conveniently located and offer extended hours to ensure you can receive dental care without any hassles. We provide a variety of dental services for all of your dental needs, from dental implants to Invisalign to teeth cleanings. Our dentists offer a personalized dental approach. We take time to get to know all of our patients and provide treatments catered to their needs.

Our office is always welcoming new patients. We look forward to meeting you and being a part of your journey to a beautiful smile and optimal oral health.


Your Northern Horizon Dental Innisfil Team & Our Health Care Team

Meet our dedicated dentists, who are dedicated to providing you comprehensive dental care in a friendly and warm environment. Our team provides the highest level of care. Learn more about our professional doctors and team below! 

Our Doctors

Dr. Daniel Sullivan (HBSc, DDS)


Dr. Daniel Sullivan received his Doctor of Dental Surgery from the University of Western Ontario and graduated with distinction. Before attending Western, he received his Bachelor of Science in Biology from Dalhousie University, 2 hours from where he grew up in New Brunswick. Dr. Sullivan takes pride in helping his patients achieve their aesthetic and functional needs, whatever they may be, and believes in a team-orientated approach that includes the patient’s wishes and input at the forefront. In his spare time, Daniel likes to golf, stay active at the gym, try new restaurants, and of course catch up on TV shows!

Dr. Dusa Sorichetti (BDS, MSc, MEng)


Dr. Sorichetti completed her Bachelor of Science in Biology degree at the University of Waterloo and then went on to complete two Master’s degrees (Master of Science followed by Master of Biomedical Engineering, University of Western Ontario). Dr. Sorichetti’s research findings of how salivary proteins can be used to predict and control oral diseases resulted in multiple first author publications in top dental journals.

Dr. Sorichetti was given the opportunity to study dentistry in Australia at James Cook University. She enjoyed the sunshine as she completed clinical rotations at three different dental clinics across Queensland. Dr. Sorichetti’s personal dental philosophy is built entirely around a patient-centred approach, where she considers patients’ best interests and designs patient-specific dental treatment for patients of all ages. In her spare time, Dr. Sorichetti enjoys travelling with her husband and spending time with her family.

Dr. Tarlan Khorram-Nezhad


Dr. Tarlan holds a Doctor of Dental Medicine from Boston University. As a general dentist, she enjoys all disciplines of dentistry with a strong passion for Pediatrics and Restorative dentistry. Dr. Tarlan is a member of the Canadian Dental Association, the Ontario Dental Association, the Royal College of Dental Surgeons of Ontario and the American Academy of Implant Dentistry. In her free time, she enjoys spending time with her family, and she loves to swim.

Dr. Hannah Seok


Dr. Hanna Seok completed her Bachelor of Science at McMaster University and received her Doctor of Dental Surgery from Western University. She takes pride in optimizing patients’ dental experience through patient education, being attentive to patients’ individual requirements and, encouraging them to be proactive about their oral health care. Passionate about dentistry and non-profit work, Dr. Seok has provided volunteer dental care to underprivileged communities in Guatemala, Haiti, Mexico and, some First Nations reserves. She is very excited to be back in her hometown, Barrie, and serve the community.

Our Team


Dental Reviews From Patients

Northern Horizon Dental Innisfil
Based on 412 reviews
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lyndsey mccarty
lyndsey mccarty
18:07 02 Jun 21
Ladies at the front are always wonderful and welcoming. Dan Sullivan is the best dentist in the world for adults and kids. The place is very clean... and organized. Great staff and office. Highly more
Chris Toth
Chris Toth
19:08 12 May 21
Always a pleasure to deal with the staff at Northern Horizon Dental. They are kind, courteous and very informative. It is the only dental office I've... ever been that treats you like a part of the "family".Dr. Sullivan is truly amazing!Can't say enough great things about Northern Horizon Dental more
Stephanie Cobb
Stephanie Cobb
14:51 05 May 21
This is such a friendly dental office. Everyone is very welcoming and they make sure you are comfortable. Best experience at a dental place ever!... Thanks for all you do!read more
Nick Cavic
Nick Cavic
18:35 22 Apr 21
Never liked going to the dentist my hole life, went to northern horizon recently and they have been nothing but amazing the past few times I've... gone.They making it painless and quick, the dentist herself is a unbelievable nice woman and does amazing work and makes you feel super comfortable during the hole process.I highly recommend Northern horizon!read more
Katie Ewing
Katie Ewing
06:10 06 Mar 21
My partner and I visited Horizon Dental for the first time today, and both him and I can honestly say that, it was some of the best service we ever... had!Reception was so friendly and welcoming. (I’m sorry, I didn’t get her name). Amanda, one of the dental hygienists is SO awesome, my partner and I loved her. She did a very thorough and great job cleaning our teeth!!Thank you so much to all of you who made our experience so great!!Katie & Matt 🙂read more
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Dr. Peter Servinis


Ask Us About Your Fees and Insurance Options 

Our goal is to provide affordable dental care. Contact us to learn more about direct billing, pricing, and financing options.