Why Choose TruMark Medical Credentialing? Discover what makes us the top medical credentialing service in Lebanon, TN. We're Local Being US-based, we credential you for all big payers such as Medicare, Medicaid, Blue Cross, Aetna, Cigna, UHC, etc. Screened & Qualified We are thoroughly qualified and undergo extensive training. Flexible However much or little assistance is needed, we understand people need help at different times or on different days. 100% Satisfaction Guarantee If you are ever unhappy with the service you receive, we will do everything we can to make it right.