Question: One of our Medicare patients came to us yesterday with a high fever, along with nausea and vomiting. I have heard that there are some new fever diagnosis codes as of ICD-9 2009. Is there any truth to that? Michigan Subscriber Answer: ICD-9 2009 did bring some changes to the fever code set, deleting 780.6 (Fever) and replacing it with four new, more specific fever codes. When you are filing the claim for services the physician provides as of Oct. 1, 2008, report 787.01 (Nausea with vomiting) and choose one of the following for the fever diagnosis: " 780.60 -- Fever, unspecified " 780.61 -- Fever presenting with conditions classified elsewhere " 780.62 -- Postprocedural fever " 780.63 -- Postvaccination fever.