Apply the appropriate Level II HCPCS code modifier for each of the following examples. Explain your rationale for each selection.
o Portable home oxygen unit
o Emergency ambulance transport and extended life support
o Diagnostic mammogram, left breast
o Cortisone 10 mg injection, right shoulder
o Nonelectric wheelchair
o Intravenous catheter line, right arm
o Laboratory certification, cytology specimens
o Chest X-ray
o Prosthetic hip replacement, left side
o Electric hospital bed