Common Billing and Documentation Issues

• Incorrect billing units: Ensure units billed match the dosage administered and the drug's billing guidelines, especially for single-dose vs. multi-dose vials.
• Modifier misuse: Do not report the JW modifier for multi-dose vials. Use modifiers appropriately based on CMS guidance.
• Insufficient documentation: Medical records must support the medical necessity of the injection, including diagnosis, prior treatment history, and rationale for therapy.
• Coding inaccuracies: Confirm correct HCPCS codes are reported for the specific product used, along with any applicable modifiers.

Similar issues have been identified in other injectable services, including IVIG, ophthalmology injections, and vitamin B12 injections. Common themes include incorrect units, modifier errors, and lack of documentation to support services billed.

To reduce errors and prevent denials, providers should:

• Verify correct drug billing units and HCPCS codes prior to claim submission
• Review proper use of modifiers for drug wastage and administration
• Ensure documentation clearly supports medical necessity and details the service provided
• Conduct internal audits of injectable drug billing and coding practices

If local coverage policies are not available, review CMS guidance, Noridian billing resources, and professional coding references to confirm correct billing practices.