January 10, 2023
New N-Modifiers for Oxygen
Joint DME MAC Publication
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
January 10, 2023 | Originally published |