To apply the correct prolonged service code, first determine the location of the service and if the service was performed on the same day as the E/M service.

To apply the correct prolonged service code, first determine the location of the service and if the service was performed on the same day as the E/M service.

• A. True
• B. False
• C. Not specified
• D. Not applicable

Answer: (A)

Understanding prolonged E/M coding starts with where the service occurs and whether the extra time happens on the same day as the E/M encounter. The location determines which series of prolonged-service codes you use (office/outpatient vs inpatient vs non-face-to-face). The same-day relationship matters because certain prolonged codes (notably the non-face-to-face ones) must be appended to the E/M service and occur on the same day as that service. So you first identify the setting: is it office/outpatient, inpatient/observation, or non-face-to-face time? Then you check if the prolonged time happened on the same day as the E/M service. If it’s in the office or outpatient setting and on the same day, you’d use the office/outpatient prolonged codes (for example, the first hour with 99354 and additional time with 99355). If it’s inpatient, you’d use the inpatient prolonged codes (99356 and 99357). If it’s non-face-to-face time on the same day, you’d use the non-face-to-face prolonged codes (99358 and 99359). This approach ensures you select the correct code for the exact setting and timing.

Understanding prolonged E/M coding starts with where the service occurs and whether the extra time happens on the same day as the E/M encounter. The location determines which series of prolonged-service codes you use (office/outpatient vs inpatient vs non-face-to-face). The same-day relationship matters because certain prolonged codes (notably the non-face-to-face ones) must be appended to the E/M service and occur on the same day as that service.

So you first identify the setting: is it office/outpatient, inpatient/observation, or non-face-to-face time? Then you check if the prolonged time happened on the same day as the E/M service. If it’s in the office or outpatient setting and on the same day, you’d use the office/outpatient prolonged codes (for example, the first hour with 99354 and additional time with 99355). If it’s inpatient, you’d use the inpatient prolonged codes (99356 and 99357). If it’s non-face-to-face time on the same day, you’d use the non-face-to-face prolonged codes (99358 and 99359). This approach ensures you select the correct code for the exact setting and timing.