Prescription Drug Benefit
OptumRx customer service number is 1-877-559-2955.
All Larimer County Administrative Services, District Attorney, Ranch and Ranch offices, and Courts will be closed on Jan. 19, 2026, to celebrate the Dr. Martin Luther King, Jr. holiday. The Larimer County Landfill will be open.
OptumRx customer service number is 1-877-559-2955.

HOURS: Monday - Friday, 8:00am-4:30pm
200 West Oak, Suite 3200, Fort Collins, CO 80521
PO Box 1190, Fort Collins, CO 80522
PHONE: (970) 498-5970 | FAX: (970) 498-5980
Email Human Resources
Email Benefits Team