Modifier QW The Medicare and Medicaid only pay for laboratory tests performed in certified facilities, each claim for a HCPCS code that is considered a CLIA laboratory test is currently edited at the CLIA certificate level. To be recognized as a test that can be performed in a facility having a CLIA certificate of waiver for listed below CPT codes and the modifier QW must be added . The CMS released updates for adding modifier QW for COVID-19 lab codes with effective date of service. The Medicare contractor shall permit the use of code 87636 QW for claims submitted by facilities with a valid, current CLIA certificate of waiver with dates of service on or after October 6, 2020 and effective from July 1, 2021 The Medicare contractor shall permit the use of code 87428 QW for claims submitted by facilities with a valid, current CLIA certificate of waiver with dates of service on or after November 10, 2020. The Medicare contractor shall permit the use of code 87811 QW for claims s
The Codepedia for Medical Coding