[California] National Drug Codes (NDCs) are required for outpatient claims
California Medicaid (Medi-Cal) now requires National Drug Codes (NDCs) in 11-digit 5-4-2 format for all outpatient claims that include drug-related services billed with HCPCS drug codes. NDCs must match the actual drug container administered, include proper unit of measure (UOM) codes, and be formatted without hyphens or spaces. Missing, incorrect, or misformatted NDC information will delay claim reimbursement.