Can EpiPen be safe for treating allergic responses to tree nuts?

Hi doctor,

I have a 16-year-old son who has always been sensitive to certain tree nuts; he is learned to avoid them over the years and has been fine. He has had mild reactions to cashew, walnuts, and pecan with itchy tongue, rash around his mouth, etc. nothing alarming; those symptoms would quickly resolve with rest, water, or a dose of cough syrup when itchiness lingered. He also has seasonal pollen allergies, triggering asthma symptoms, including wheezing (when he was very young). He used a nebulizer until first or second grade (six to seven years old) and has not needed one since. He still has seasonal allergies, but his wheezing has subsided to almost nonexistent. However, now at the age of 16, his pediatrician asked me if he was allergic to anything during his last routine physical. I answered tree nuts. He added that to his blood workup, which came back with high levels of hazelnut, walnut, and pecan. We have gone to the same pediatrician for the last 16 years and never changed. With that report, his doctor wants to prescribe an EpiPen. It is not only expensive; it is overkill. Is it essential? Please offer some objective advice on this case. Thank you.