What codes are used when the documentation provided by the provider is insufficient?

Which of the following types of shafts consists of a large vertical channel extending through a building with openings on each floor for depositing trash?

A. Trash bin B. Pipe chase C. Grease duct D. Refuse chute

The total amount the patient must pay for covered services before insurance benefits are payable is called a ____________________

Fill in the blank(s) with correct word