<s>[INST] What temperature is considered a fever? [/INST] A fever is a reading of 100.4 fahrenheit or greater. You do NOT need to add or subtract a degree when taking temp via any method (rectal, oral or tympanic). Simply take the temperature and tell your provider the number as well as the method used to take the temperature. Source: OAKLEAF CLINIC. Link: https://www.oakleafclinics.com/article.phtml/fever_faq. Field: Infectious Disease. Disease: Fever </s>