MACs will apply the “one every three days” frequency edit logic for telehealth services when
codes 99231, 99232, and 99233 are billed with POS 02 for claims with dates of service January
1, 2018, and after. This frequency editing also applies when these services are span-dated on
the claim (that is, the “from” date and the “to” date of service are not equal, and the “units” field
is greater than one).
MACs will apply the existing “one every 30 days” frequency edit logic for telehealth services
when codes 99307, 99308, 99309, and 99310 are billed with POS 02 for claims with dates of
service January 1, 2018, and after. This frequency editing also applies when these services are
span-dated on the claim (that is, the “from” date and the “to” date of service are not equal, and
the “units” field is greater than one).

https://www.cms.gov/Outreach-and-Education/Medicare-Learning-Network-MLN/MLNMattersArticles/downloads/MM10152.pdf