Intraoperative Neuromonitoring (IONM) reimbursement
Defines Anthem Blue Cross and Blue Shield commercial reimbursement rules for intraoperative neuromonitoring (IONM), including billing, place-of-service, and provider reporting requirements for professional providers and facilities.
No material clinical or coverage changes in this revision.
Intraoperative Neuromonitoring Coverage Criteria
IONM coverage criteria
Coverage and reporting rules for intraoperative neuromonitoring (IONM) in hospital-based settings. Reimbursement is allowed when the following conditions are met:
ALL of the following
- Place of Service: Reimbursement allowed when billed with POS 19 (Off campus-outpatient hospital), 21 (Inpatient hospital), 22 (On campus-outpatient hospital), or 24 (Ambulatory surgical center). Use the place of service where the member is located even if the monitoring physician is remote.
- Setting requirement: IONM must be performed in a hospital setting using the place of service where the member is located.
- Billing Form: IONM codes must be billed on a CMS-1500; IONM services billed on a UB-04 will be denied.
- Provider reporting: IONM should not be reported by the surgeon or anesthesiologist performing the operative procedure because it is included in the global package.
Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.