UB-04 (CMS 1450) Health Insurance Claim Form. 
The CMS-1450 form (aka UB-04 at present) can be used by an institutional provider to bill a Medicare fiscal intermediary (FI) when a provider qualifies for a waiver from the Administrative Simplification Compliance Act (ASCA) requirement for electronic submission of claims. It is also used for billing of institutional charges to most Medicaid State Agencies.
Box with 2,500 forms.