Why Do Small Credentialing Details Matter So Much for Medical Practices? Before a provider can bill a payer under an in-network arrangement, the payer generally needs to verify professional qualifications, licenses, work history, practice information, and other credentials. This makes medical credentialing services an important part of a practice's administrative operations. https://whatson.plus/blogs/137696/Why-Do-Small-Credentialing-Details-Matter-So-Much-for-Medical