Lander M. answered 03/22/19
Experienced Test Prep Instructor with Perfect SAT/ACT Scores
It seems that this colloquial usage is conflating two types of negation. For the first, one might say, "I have no allergies or medical issues," in which case "no" would apply to the group of "allergies or medical issues" as a unit; for the other, one might say, "I have neither allergies nor medical issues," in which case it would be acceptable to include "any" before "medical issues". However, as you've noticed, the sentence "I have no allergies or any medical issues" confuses the extent and application of the negation; thus, this form should be avoided.