Meet The Team

Our Dentists

Tanzila Chaudhry, DMD

Dr. Chaudhry received her undergraduate degree from NYU and completed her dental education in 2014 at the Rutgers School of Dental Medicine. Upon graduating from Dental School, Dr. Chaudhry completed her residency at Bellevue Hospital and became a member of several professional associations including the Academy of General Dentistry.

Dr. Chaudhry specializes in general and restorative dentistry and enjoys connecting with all of her patients to ensure they have a comfortable experience.

Dr. Chaudhry lives in Hastings on Hudson with her husband and daughter. In her downtime, she enjoys going to the city, cooking, reading and spending time with family.

Sophia Koos, DDS

Dr. Sophia Koos is a compassionate and dedicated dentist from Westchester County, New York. Raised in Mount Kisco, she graduated from Fox Lane High School and pursued her undergraduate studies at SUNY Binghamton, majoring in Integrative Neuroscience. Recognizing the significant impact of exceptional dental care on overall well-being and self-esteem, she chose a career in dentistry to help others achieve healthy and beautiful smiles.

In 2021, Dr. Koos graduated from Touro College of Dental Medicine in Hawthorne, NY, the first new dental school in the state in nearly 50 years. With its emphasis on advanced technology and comprehensive education, Touro provided her with a solid foundation in dentistry. To further enhance her skills, she completed a General Practice Residency at NYU-Langone Medical Center, a top-ranked hospital according to U.S. News & World Report. During her residency, she gained expertise in various general and specialty procedures, including emergency dental treatment at a Level 1 Trauma Center.

In her spare time, Dr. Koos enjoys reading and maintaining an active lifestyle at the gym. She is honored and excited to join the esteemed team at Ashford Dental, where she will utilize her skills and genuine care to help patients achieve and maintain their optimal oral health.

John Dimaggio, DDS

Dr. John DiMaggio is a skilled and compassionate dentist dedicated to delivering exceptional, patient-focused care. Specializing in advanced restorative and cosmetic dentistry, he utilizes cutting-edge techniques to achieve natural-looking, durable results. His expertise includes minimally invasive procedures such as veneers, implant restorations, and Invisalign therapy, all aimed at preserving the integrity of natural teeth while enhancing smiles.

Originally from Chicago, Dr. DiMaggio earned his Bachelor’s degree in Molecular Biology and Anthropology from the University of Illinois and a Master’s in Human Skeletal Biology from New York University. Inspired to integrate science and patient care, he graduated with honors from NYU College of Dentistry and completed a General Practice Residency at New York Presbyterian Brooklyn Methodist Hospital.

Dr. DiMaggio has advanced training in Biomimetic and Adhesive Dentistry and is an active member of the American Academy of General Dentistry, the Ninth District Dental Society, and the American Academy of Clear Aligners. His evidence-based approach ensures every treatment is minimally invasive, durable, and tailored to each patient’s needs.

Dr. DiMaggio lives in Dobbs Ferry with his wife, An, and the couple looks forward to building their future and starting a family in Westchester. Beyond dentistry, he enjoys hiking, running, and exploring the outdoors. Known for his approachable and caring demeanor, Dr. DiMaggio is honored to serve the community and help patients achieve healthy, confident smiles.

Steven Ritholtz, DDS

Dr. Steven Ritholtz earned his Doctor of Dental Surgery degree from New York University College of Dentistry. Subsequently, he completed a general practice residency at Bellevue Hospital with a specialization in implantology. It was during this time that he was introduced to Invisalign while working alongside Dr. David Galler at his Manhattan location, who eventually became his mentor.

Dr. Steven established his own practice, where he expanded his expertise to encompass various aspects of cosmetic dentistry, with a particular focus on orthodontics. He also possesses extensive training in the Bioclear Matrix System, veneers, and sleep medicine. Over the past five years, he has achieved the status of a Platinum Invisalign Provider, having successfully completed over 850 cases during that time, making him a prominent Invisalign provider in Lower Manhattan.

Dr. Steven is now bringing his wealth of experience and success to Westchester, with the aim of transforming more smiles in the community.

In his free time, Dr. Steven enjoys biking, golfing, and spending quality time with his four children in Long Island, where he resides.

Yohan Kim, DMD, FICOI

Yohan Kim, DMD, FICOI, is a highly accomplished dentist with a strong educational background and extensive experience in various dental specialties. He holds a Doctor of Dental Medicine (DMD) degree from the University of Pennsylvania, where he ranked among the top 10% of his class. Dr. Kim has expertise in implant dentistry and has served as a Clinical Instructor at the New York University Implantology Program, mentoring dentists in planning and performing implant surgeries. He is dedicated to education and actively contributes to lecturing and assisting general dentists. Dr. Kim has also actively participated in dental missions, providing assistance in cleft lip and cleft palate surgeries. He is a distinguished member of professional organizations and has received certifications and fellowships in various dental disciplines.