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Sang (Ben) Ahn, DDS – Blue Diamond Provider
Education, Training & Professional Memberships
Education & Training
Dr. Ahn earned his Bachelor of Science degree from the University of Toronto and his Doctor of Dental Surgery degree from New York University College of Dentistry. He completed a general practice residency at Lutheran Medical Center in Brooklyn.
Professional Memberships
Dr. Benjamin Ahn holds active memberships in four professional dental organizations:
- American Dental Association (ADA)
- Canadian Dental Association (CDA)
- Academy of General Dentistry (AGD)
- New York Dental Second District Society
About Our Second Location, 172 NYC Dental
172 NYC Dental uses the latest iTero Element scanner for digital impressions, eliminating traditional putty molds. The office also provides digital x-rays, CT scans, and dental lasers for precise diagnosis and treatment planning.
What Patients Say About Dr. Ahn
Fantastic service. Always helpful and professional staff. Dr Ahn is best !
The staff are always so helpful and friendly. Dr Ahn is truly the best dentist I ever had. He is so calming and reassuring. I have never experienced any pain when he works on my teeth!
Love the practice. Dentist, hygienist orthodontist and support staff all engaging, professional and very very good at what they do.
Everyone there is so nice and patient with overgrown toddlers like myself haha. I recommend Dr. Ahn and Dr. Wang especially.
I have always liked Dr Anh and his staff. This is not always true of medics and/ or staff!!
Dr. Ahn started practicing Invisalign in 2003 before most providers in New York City had begun offering clear aligners. (not certificate in 2003)
Dr. Ahn has completed over 4,000 Invisalign cases across the full spectrum of bite severity, from minor crowding to complex multi-tooth movements including overbites, underbites, crossbites, and open bites.
Community Work & Recognition
Outside the practice, Dr. Benjamin Ahn is active in charitable work across New York City and internationally. Bank of America recognized his contributions with the Neighborhood Builders award, given annually to community leaders producing measurable local impact. Dr. Ahn and his wife have also appeared on a Korean reality television series.
Frequently Asked Questions
What bite problems can Dr. Ahn treat with Invisalign?
Crowding, gaps, overbite, underbite, crossbite, open bite
Dr. Benjamin Ahn uses Invisalign aligners to correct six common bite problems: crowding, spacing and gaps, overbite, underbite, crossbite, and open bite. Mild to moderate cases typically resolve within 6 to 12 months. Complex cases involving multiple bite issues may take up to 18 months. During your consultation, Dr. Ahn uses the iTero Element scanner to generate a digital treatment plan showing projected tooth movement before any aligners are made. This lets you see your expected outcome before committing to treatment.
What does Invisalign Blue Diamond status mean for patients?
Wider case experience, advanced technology
Invisalign Blue Diamond status is awarded to doctors who consistently treat a high volume of cases and maintain strong patient outcomes. For patients seeing Dr. Ahn, this means working with a doctor who has managed a wider range of clinical scenarios than most Invisalign dentists in New York City. He has the experience to handle cases that fall outside the standard range, including complex bites, multi-issue corrections, and cases other providers may not take on. Blue Diamond doctors also use advanced digital scanning and customized treatment planning tools, which contributes to more precise results and, in many cases, faster treatment.
Does Dr. Ahn offer other dental services in addition to Invisalign?
Yes, full general and cosmetic services available
Dr. Benjamin Ahn provides a full range of general and cosmetic dental services at 172 NYC Dental. General services include dental exams, emergency dental care, and tooth extractions. Cosmetic services include porcelain veneers, dental crowns, onlays, and professional teeth whitening. Patients looking for a complete smile design often combine Invisalign with veneers for aesthetic refinement, or Invisalign with dental implants to replace missing teeth while correcting alignment. Both treatment combinations are coordinated through a single plan with Dr. Ahn at 172 NYC Dental in Midtown Manhattan.
Schedule a Consultation with Dr. Sang (Ben) Ahn
Call or book online to meet with Dr. Benjamin Ahn at 172 NYC Dental in Midtown Manhattan. New patients welcome. Open Monday through Saturday.
Same-day appointments available most days.
172 NYC Dental172 Madison Ave
New York, NY 10016
At 33rd Street | Midtown
Subway: 6 Train to 33rd St | B, D, F, M, N, Q, R, W to 34th St-Herald Sq
Train: Walking distance from Penn Station and Grand Central Terminal
