HCPCS Modifier CS

HCPCS Modifier CS - Cost-Sharing is Waived (COVID-19)

Previously, CMS made available the CS HCPCS modifier for the gulf oil spill in 2010. Recently, however, CMS repurposed the CS HCPCS modifier for COVID-19 purposes. Now, for services furnished on March 18, 2020, and through the end of the Public Health Emergency, outpatient providers, physicians, and other providers and suppliers that bill Medicare for Part B services under specific payment systems should use the CS HCPCS modifier on applicable claim lines to identify the service as subject to the cost-sharing wavier for COVID-19 testing-related services and to get 100 percent of the Medicare-approved amount. Additionally, providers should not charge Medicare patients any co-insurance and/or deductible amounts for those services.

During the COVID-19 Public Health Emergency, CMS has provided specific guidelines for the use of HCPCS Modifier CS in the following CMS publications:

Contact Palmetto GBA JM Part B Medicare

Email Part B

Contact a specific JM Part B department

Provider Contact Center: 855-696-0705

TDD: 866-830-3188

Other Palmetto GBA Sites

Palmetto GBA Home

DMEPOS Competitive Bidding Program

Jurisdiction J Part A MAC

Jurisdiction J Part B MAC

Jurisdiction M Part A MAC

Jurisdiction M Part B MAC

Jurisdiction M Home Health and Hospice MAC


National Supplier Clearinghouse MAC


RRB Specialty MAC Providers

RRB Specialty MAC Beneficiaries



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