BA

1. See business associate (BA) . 2. HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating item(s) used with parenteral enteral nutrition (PEN) services.

Back date

Issuance of an insurance policy for an individual or a group that is effective on a month, day, and year earlier than the date of actual issue so that the premium rate will be lower. State law usually limits backdating to not more than 6 months. Also called dating back .

Back Draft

The explosion or rapid burning of heated gases that occurs where oxygen is introduced into a building that has not been properly ventilated and has a depleted supply of oxygen due to fire.

Back Up Policy/Layer

An excess of loss layer that provides for further reinstatements of cover after the exhaustion of the automatic reinstatements of the original contract. The policy defines which basic contracts come within its scope and how many reinstatements they contain. Top and drop is a development of the back up layer, but the reinsured who relies upon it runs the risk that the top layer may have been exhausted by earlier calls upon it.