Didn't answer and caller left no message. According to posts elsewhere, it's likely an online pharmacy call or scam call purporting it's time to refill meds as a pretext to get personal info. I did also read several other places that 713-766-8989 is not a valid phone number and therefore probably spoofed. I live in Houston and 713 is one of the area codes, I'm sure they figure people are more likely to answer if the area code is familiar. But alas! Not I, said the fly.