# Companion Animal Medical Services Canonical URL: https://heypaww.com/vets/clinic/companion-animal-medical-services-st-charles-il-28444 Veterinary clinic listing in St. Charles, IL. - Address: PO Box 3808, St. Charles, IL, 60174 - Phone: (630) 430-2531 [Directions in Google Maps](https://www.google.com/maps/dir/?api=1&destination=PO%20Box%203808%2C%20St.%20Charles%2C%20IL%2C%2060174) Directory snapshot: September 16, 2026. Contact the clinic directly to confirm its address, availability, hours, and services. Map coordinates are approximate; this is not a verified entrance. Paww is an independent directory and does not provide veterinary care or endorse this listing.