When an office visit takes exceptionally long, standard E/M codes aren't enough. CPT 99417 is an add-on code used to capture prolonged outpatient E/M services.
When to Bill 99417
CPT 99417 can ONLY be billed in conjunction with the highest level E/M codes (99205 ↗ or 99215 ↗). It is billed in 15-minute increments once the maximum time for the base code has been exceeded.
- 99215: 40-54 minutes.
- 99417 (First unit): Can only be billed when total time hits 55 minutes.
Medicare Exception: G2212
It is critical to note that Medicare does NOT accept CPT 99417. For Medicare patients, you must bill the HCPCS code G2212 ↗ instead, and Medicare's clock starts much later (you cannot bill G2212 until 69 minutes for an established patient).
Add-On Code NCCI Edits
As an add-on code, 99417/G2212 never requires a Modifier 51 or 59 when billed alongside its primary code (99205/99215). Check your edits if adding additional procedures.