What Is an Invisalign Purple Diamond Provider?
Short answer
Invisalign Purple Diamond is a provider tier awarded by the manufacturer, generally based on the number of Invisalign cases a provider treats within a period. It reflects aligner experience by volume, not a direct measure of clinical quality. Dr. Sally Lee of Isu Yonsei Baro Orthodontics is a 2026 Invisalign Purple Diamond provider and an MOHW-certified orthodontic specialist.
What provider tiers are
Align Technology, the company that makes Invisalign, recognizes providers in tiers. These tiers are generally based on how many Invisalign cases a doctor or practice treats over a given period. Names such as Silver, Gold, Platinum, Diamond and others are used, and higher tiers typically reflect higher case volume. Purple Diamond is among the higher tiers. Exact criteria and tier names are set by the manufacturer and can vary by region and year.
What a tier can tell you
- The provider treats a meaningful number of aligner cases.
- They are familiar with the Invisalign planning software and workflow.
- They are likely to have seen a range of case types.
What a tier does not tell you
- It is not a direct measure of clinical quality or outcomes.
- It does not indicate specialist orthodontic training.
- It does not show whether a provider offers other options when aligners are not the best fit.
For that reason, a tier is best seen as one piece of information alongside training, certification and how the doctor explains your case.
Other things worth checking
- Is the provider a certified orthodontic specialist? In Korea, look for Ministry of Health and Welfare certification (치과교정과 전문의).
- Does the same doctor plan and supervise your case at every visit?
- Are 3D X-rays or CT used to check roots and bone before planning?
- Does the clinic offer braces too, so the recommendation follows your case?
- Do you receive a written, itemized estimate after an exam?
What to expect at Isu Yonsei Baro
Dr. Sally Chaekyung Lee is a 2026 Invisalign Purple Diamond provider. She is also Invisalign certified, has served as an Invisalign instructor for university hospitals and is an orthodontic specialist certified by Korea's Ministry of Health and Welfare, with a PhD in Orthodontics from Yonsei University.
Because she also offers Angel Aligner and metal, ceramic and lingual braces, she can recommend aligners when they suit your case and suggest an alternative when they do not. In Dr. Lee's practice, each aligner plan is designed around the teeth, roots, bite and whole-face balance seen on 3D imaging, rather than accepting the software's default setup.
Your first visit takes about 60 minutes and ends with options, a timeline and a written estimate in English.
Individual results and side effects vary; treatment is decided after examination.
Key points
- An Invisalign provider tier set by the manufacturer
- Generally based on case volume over a period
- Indicates aligner experience, not a quality rating
- Tier names and criteria can vary by region and year
- Dr. Lee: 2026 Purple Diamond, Invisalign certified, university hospital Invisalign instructor
Answered by
Dr. Sally Chaekyung Lee, DDS, PhD
- MOHW-certified orthodontic specialist
- PhD in Orthodontics, Yonsei University; Severance Hospital residency
- Member, Edward H. Angle Society of Orthodontists
- 2026 AJO-DO peer reviewer
- Consults in fluent English and treats you herself, start to finish
People also ask
Is a Purple Diamond provider better than other providers?
Not necessarily. The tier generally reflects case volume, which suggests experience with aligners, but it is not a quality rating. Training, specialist certification, diagnosis and communication are also important when choosing a provider.
Does Purple Diamond status change the price?
Fees depend on your case complexity, the number of aligners, treatment length and retention. At Isu Yonsei Baro, you receive a written, itemized estimate in English after an exam, regardless of provider tier.
Are Invisalign tiers the same worldwide?
Tier names and qualifying criteria are set by the manufacturer and can vary by region and year. If you are comparing providers in different countries, focus on training and experience as well as tier.
Is Dr. Lee an orthodontic specialist as well?
Yes. Dr. Sally Lee is an orthodontic specialist certified by Korea's Ministry of Health and Welfare. She completed her orthodontic residency at Severance Hospital and holds a PhD in Orthodontics from Yonsei University.
Related reading
This page is general information, not a diagnosis. Individual results and side effects vary; treatment is decided after an in-person examination. See our editorial and medical review policy .
Have a question about your own teeth?
Send a message with photos or previous records. Dr. Lee will tell you what an examination would look at, in English.