Benefits for UNSCHEDULED services (modifier SURC) and special callback HSCs 03.03LA, 03.03MC, 03.03MD, 03.05P, 03.05QA, 03.05QB and 03.05R are intended to cover a degree of disruption that a physician would have to experience to provide such services during:

• the evening on weekdays (1700 - 2200 hours),
• the day and evening on weekends and statutory holidays (0700 - 2200 hours)
• any night of the week (2200 - 0700 hours)