Patient portal - doctor's office ... Urgent Care. Check in online to lessen the amount of time you spend waiting at the office. Web Check-In. CareNow bill pay - Urgent Care. Pay your CareNow bill conveniently online. ... Eastern Idaho Regional Medical Center (EIRMC) 3100 Channing Way Idaho Falls, ID 83404 Telephone: (208) 529-6111. Highlights ....