In plain language
C022 is the rubber dam used to keep one or more teeth dry and isolated.
The code covers applying the rubber dam, not each individual tooth. It therefore applies once per application, regardless of the number of teeth inside the dam.
What does this code show?
- Isolation of teeth using a rubber dam.
- One application remains one line even when the dam includes several teeth.
When may it appear?
- The NZa permits C022 next to performances in chapters E, V and R, and next to M80 or M81.
- It is therefore not a standard surcharge for every treatment.
Useful when reading an invoice
- If C022 appears, look for the related E-, V-, R-, M80- or M81 line.
- That combination explains why this separate line is visible.
Official NZa tariff decision · 2026
