Hi Guest! D6245 – pontic – porcelain/ceramic D6548 – Retainer – porcelain/ceramic for resin bonded fixed prosthesi There are not a direct crosscodes we are aware of for these services, so you can either use the “D” code on the pre-authorization request/medical claim (many insurers these days will process “D” codes when they are medically necessary services), or you can use the CPT code below and include a narrative report describing the service: 41899 – Unlisted procedure, dentoalveolar structures Hope this helps!