CPT: Use inpatient prolonged service codes with subsequent observation care codes
If you provide subsequent observation care for at least 30 minutes longer than the typical time described by codes 99224-99226, CPT says you should be able to bill for prolonged service, since the subsequent observation codes include typical time estimates (unlike the initial observation codes 99218-99220).
To read the full article, sign in and subscribe to the DecisionHealth Newsletters.