Claims — Submit claims to: Cigna Medical Claims P.O. Box 188061, Chattanooga, TN 37422-8061 Payer ID 62308 Explanation of Payment (EOP) — You'll receive an EOP for billed services with processing information for the visit. Pharmacy — Call MedImpact at 1-800-788-2949, 24 hours a day, 7 days a week.