Find me a mention of microchips in the Bible or any non-canonical writings (anywhere from Jubilees and Enoch to the Gospel of Judas and the Gospel of Thomas) and I'll give you a cookie.
Actually, I know almost nothing about microchips, but depending on how much information you could put on them, it might be a good idea; there have been times when I'd have given my eye teeth for a patient's diagnoses, medications, and allergies (and maybe a copy of their most recent EKG).