Q&A: When coding with ICD-10, what does the 'x' represent?

QUESTION: I’ve seen some ICD-10-CM codes that contain an “x” in the code, and I’m confused about whether the “x” is necessary, or does it mean I need to choose the appropriate character for that digit? I’ve also seen “x” used in ICD-10-PCS. Does the “x” mean the same thing as it does in ICD-10-CM?

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