Effective March 18, 2020, the Families First Coronavirus Response Act requires Medicare Part B to cover beneficiary cost-sharing for provider visits when a COVID-19 diagnostic test is administered or ordered. CMS updated the list of codes (ZIP) that physicians and non-physician practitioners can use with the Cost-Sharing (CS) modifier. For dates of service on or after January 1, 2021, through the end of the public health emergency, we will accept these codes with the CS modifier:

• HCPCS codes G2250, G2251, and G2252
• CPT codes 98970, 98971, and 98972 (These replace HCPCS codes G2061 – G2063, which are accepted for services provided in 2020.) 

CPT codes 98966, 98967, and 98968 are accepted for services with the CS modifier provided on or after March 18, 2020.

CMS provides more information about cost-sharing in the Medicare Fee-For-Service (FFS) Response to the Public Health Emergency on the Coronavirus (COVID-19) (PDF) MLN Matters Article.

Source: CMS MLN Connects, February 11, 2021