These CPT codes can sometimes be tough and confusing to understand. We've worked hard to make their requirements as clear as possible.
$42 For an additional 20 minutes of monitoring on top of the requisite 20 minutes (99457) per month.
Yes. 99457 is required in order to bill 99458.
You need to monitor an additional 20 minutes or more.
In 2020 99458 was introduced to account for extra time spent monitoring patients.