Hi Guest! D9222 – deep sedation/general anesthesia – first 15 minutes and D9223 – deep sedation/general anesthesia – each additional 15 minutes can be crosscoded to: 00170 – Anesthesia for intraoral procedures, including biopsy; not otherwise specified 00172 – Anesthesia for intraoral procedures, including biopsy; repair of cleft palate 00174 – Anesthesia for intraoral procedures, including biopsy; excision of retropharyngeal tumor 00176 – Anesthesia for intraoral procedures, including biopsy; radical surgery Hope this helps!