What is risk management coding?

Trinity, TX
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I see Risk Management Coding jobs but I cannot find what kind of coding job it is. The tests are in ICD-9-CM. Is it denials? I applied for a job and was surprised that the coding test was in ICD-9-CM. I do not have a book anymore for that so I took the test and tried using online help. Needless to say I did not do good. I was notified by them and they offered to let me retake the test. I asked them this question 'what is risk management coding , is it like denials'and offered to buy an ICD-9-CM book to retake the test. They never responded to my email.

Thank you