A liner is a device which is placed between the patient’s skin and the PAP mask interface. Liners used with a PAP mask are made of cloth, silicone or other materials. A liner used in conjunction with a PAP mask is considered comfort/convenience item.

There is no additional payment for liners used with a PAP mask. These products should be coded A9270 (Noncovered item or service) in accordance with the Medicare Benefit Policy Manual 100-2 Chapter 15 Section 110.1.

Liners are not interfaces for use with a PAP mask. Consequently, liners should not be billed as replacement features of a PAP mask such as A7031 (Face mask interface, replacement for full face mask, each) or A7032 (Cushion for use on nasal mask interface, replacement only, each).

For questions about correct coding, contact the PDAC Contact Center at (877) 735-1326 during the hours of 8:30 a.m. to 4:00 p.m. CT, Monday through Friday, or e-mail the PDAC by completing the DME PDAC Contact Form located on the PDAC website:

Published by Noridian as the PDAC, January 2014.  Republished by Palmetto GBA as the PDAC, February 2019.  Please note that links in this document were accurate at the time of original publication and may change over time and are no longer active.

Last Updated: 01/29/2014