The character for contrast/qualifier would be found in a/an code: gestational/ therapeutic/surgical/imaging

Imaging code has the character for contrast/qualifier. These codes in the imaging section describe procedures and diagnostic as part of the ancillary subsection, where it consist of 2,934 codes. In addition, the fifth character is contrast, while character 6 and 7 are qualifiers in the ICD-10-PCS coding procedures.

to provide benchmarks

the answer would be a." don't hit a home run when the game is tied"