Professor ignoring emails and not attending office hours I recently received back an exam, and noticed after reviewing it a few days later a serious grading discrepancy. I sent my professor an email to confirm that he would be available in his next office hour, but received no reply. I then stopped by his office at the beginning of office hours but found that he was not in his office and remained absent for the entirety of the office hour.

After several days of no reply, I sent another email, which has also received no reply after several more days. I am unsure how to proceed, as the semester is nearly over and grades will be finalized within about a week. I am wondering if I need to escalate this in order to have my score corrected as the error could seriously impact my final grade in the course. Is there someone that I should contact to discuss this? If so, who should I contact? Otherwise, what is the best course of action to take? Thank you for any advice.
If you are feeling desperate, go to the department office and tell them you need to contact the professor over a grading issue that you are afraid will slip through the cracks at end of term. Ask to have them have the professor contact you, leaving contact information. You could even write a note for the office to pass to the professor detailing your concerns. The office is likely to see the professor before you do. 

The prof may still not respond, but you have left a marker that establishes your timely concern. 

Don't be overly concerned about lack of response at end of term. There may be a lot on the professor's plate also. There are also ways to work things out that don't require immediate action, as long as you leave a trail of effort to contact and resolve the issue. 

But don't increase the "noise" going directly to the professor. It probably won't help and might hurt.