How do you bill for inhalation of nitrous oxide (D9230) medical?February 25, 2015 by Admin « Back to Previous Page Answer Question ▲0 ▼ ♥ 0 Marked as spamAsked on February 25, 2015354 viewsFollowUnfollow ▲-1 ▼✔ Private answerNitrous oxide is billed using the same "D" code as it is considered a HCPCS code in Medicine.Marked as spamAnswered on February 26, 2015 « Back to Previous Page Post your AnswerAttach YouTube/Vimeo clip putting the URL in brackets: [https://youtu.be/Zkdf3kaso] Notify me of follow