Which of the following radiographs is ideal for visualizing the crestal lamina dura in a patient with moderate periodontitis?

When using a FOUR-digit Medicare "type of bill" code in form locator 4, the type of facility is represented by the:

first digit. second digit. third digit. fourth digit.

If a claim is denied due to lack of medical necessity, the provider must refund any payment made by the carrier and can bill the patient for the balance

Indicate whether this statement is true or false.