The Centers for Medicare & Medicaid Services (CMS) finalized in the 2018 Medicare Physician Fee Schedule (MPFS) final rule their proposal to remove oxygen gas supply item (SD084) from a series of CPT codes that were previously valued with moderate sedation as an inherent part of the procedure.
It occurred to CMS, after finalizing the creation of separately billable codes for moderate sedation during the 2017 MPFS final rule, that oxygen gas is included in the moderate sedation pack contained within the separately billed moderate sedation codes; and that the continued inclusion of the oxygen gas in these codes is a duplicative supply.
More Information : link