RETIRED - New N-Modifiers for Oxygen

IMPORTANT: THIS DOCUMENT CONTAINS OUTDATED INFORMATION.

Content Provided on this page contains outdated information and instruction and should not be considered current. Noridian is providing this archived information for research purposes only. This archived article contains previously issued instructions that have since been updated or are no longer applicable for Medicare billing purposes.

Joint DME MAC Publication
Posted January 10, 2023

The Centers for Medicare and Medicaid Services (CMS) published a Medicare Learning Network article announcing the new N-modifiers for oxygen. The 3 new modifiers for home oxygen use under national coverage determination (NCD) 240.2 and the DME MAC Oxygen and Oxygen Equipment Local Coverage Determination (LCD) and LCD-related Policy Article (PA) were created to indicate the appropriate treatment regimen and presence of supporting documentation for each Medicare patient oxygen therapy group:

  • LCD Group I: modifier N1 (NCD Section B)
  • LCD Group II: modifier N2 (NCD Section B)
  • LCD Group III: modifier N3 (NCD Section D)

The new modifiers are effective January 1, 2023 and will be available in the April 2023 HCPCS code release.

The DME MACs will be incorporating instructions for the use of the new modifiers, in lieu of the KX modifier, in an upcoming revision to the Oxygen and Oxygen Equipment LCD (L33797) and the Oxygen and Oxygen Equipment LCD-related PA (A52514). Suppliers will be given advanced notice to allow ample time for system changes prior to implementation. Until the Oxygen and Oxygen Equipment LCD and LCD-related PA are revised, suppliers are instructed to continue to follow the current Oxygen and Oxygen Equipment LCD-related PA instructions for the use of the KX modifier.

Publication History

Date of Change Description
01/10/23 Originally Published
02/23/23 Retired. Information no longer current. The LCD and/or LCD-related PA have been updated to include applicable information.

 

Last Updated Dec 10 , 2023