Anesthesia Coding:
Know Limitations of G8 Modifier
Published on Tue Mar 31, 2026
Question: Can I apply modifier G8 for any procedure for a Medicare beneficiary if the documentation says the procedure is complicated and invasive? Arizona Subscriber Answer: No. According to the Centers for Medicare & Medicaid Services (CMS), modifier G8 (Monitored anesthesia care (mac) for deep complex, complicated, or markedly invasive surgical procedure) is only appropriate for certain procedures. Other payers’ [...]