Radiology and Hospital Charges Due to the requirements of some insurance companies or the nature of certain laboratory studies your lab tests may be sent from our office to a reference laboratory. Reference laboratories are independent of our practice and will bill separately for their services. For all laboratory radiology and hospital charges it is the patient's responsibility to determine if these providers are covered by your individual plan. Most will bill your insurance directly. If you have questions about bills and cannot resolve them with insurance company or other provider directly please talk to a member of our billing staff.