CMS to Update County Data for COVID-19 Testing Weekly and Allow Use of State or County Data in Updated Methodology

The Centers for Medicare and Medicaid (CMS) has updated the Excel file that flags COVID-19 positive test rates in counties. CMS modified the method for classifying a county as green, yellow, or red and expanded the measure to cover results over a 14-day period in each county instead of seven days. 

The revised methodology results in some red counties with rates >10% being reclassified to yellow:  

• Green = Counties with test percent positivity <5.0% or with <20 tests in past 14 days 
• Yellow = Counties with test percent positivity 5.0%-10.0%; OR with <500 tests and <2,000 tests/100k and >10% positivity over 14 days 
• Red = >10.0% and not meeting the criteria for “Green” or “Yellow” 

Posting Frequency: CMS also clarified that it will post county data weekly​. It stated that facilities must check weekly and should pick one day of the week to check each week. They should document their plan for checking and document the dates used by CMS for the data in the top of the Excel file.  
Using State or County Data: CMS has indicated on several national calls that facilities can use test positivity data released by their state or county if the data is more recent than the CMS data. The facility must document the source and date of the data being used.