Send Rx claims to: Meritain Health P.O. Box 27267 Minneapolis, MN 55472-0267 Meritain Health Benefit/Claim Customer Service 1-866-808-2609: A Meritain Health Customer Service Representative will be able to assist you with benefit/claims questions. Meritain Health 24 Hour Automated Customer Service Info Line 1-800-566-9311: An.