Do i append modifier 25 on 99233 with 93306?

Modifier 25 is used to indicate that a significant, separately identifiable evaluation and management (E/M) service was provided on the same day as a procedure. If you are billing for a 99233 (an E/M service) along with 93306 (an echocardiogram), you would append modifier 25 to 99233 only if the E/M service was distinct and not part of the procedure. Make sure to document the medical necessity for both services clearly to support the use of modifier 25.