CommercialBilling CodesHigh impact
Preparing for Immunization Season
Blue Cross Blue Shield of North Dakota·ND·Provider News
We identified it
Jun 19, 2026
Summary
BCBSND issued updated billing requirements for immunization season. Key changes include: bill immunizations on CMS-1500 forms (even for inpatients using POS 21), use modifier 59 when billing influenza and COVID vaccines together with codes 90471 and 90480, and ensure proper diagnosis coding with ICD-10 Z23.
Action Required
Immediately: Update billing procedures to ensure all immunizations are billed on CMS-1500 forms, including inpatient immunizations using POS code 21. Train billing staff to append modifier 59 when billing influenza and COVID vaccines together using administration codes 90471 and 90480. Update claim templates to include ICD-10 Z23 for immunization encounters. Review any recent CPT 90480 claim denials and resubmit with correct billing format.