Oxygen and Oxygen Equipment Services: KX, GA, GY, or GZ Modifier Required for DOS On/After August 1, 2018
For oxygen and oxygen equipment claims with Dates of Service (DOS) on/after August 1, 2018, the use of a KX, GA, GY, or GZ modifier is mandatory. Claim lines missing one of these modifiers will reject as missing information. For details, see the joint DMD Correct Coding - Submitting Oxygen Claims with Modifiers KX, GA, GY, and GZ article.
Last Updated Jul 09, 2018