What I got from the AAPC Website is this:
Severity: The patients statements regarding a degree or measurement of how bad it is. For example, improved, extreme pain, blood sugar was 200, he was feeling "better", or she feels that it is intolerable", etc
Quality: The patients statements regarding characteristics about the problem. How it looks or feels For example, green phlegm, popping knee, metallic taste, throbbing pain or a whistling sound, etc.
That's why I thought Quality would be more appropriate.
Help me understand the differences, please!!