This guide outlines the process for uploading supporting documents necessary for completing a practitioner’s credentialing application in the CAQH Provider Data Portal. It details the steps practitioners must follow, starting from logging into their profile to uploading required documents. Practitioners must complete all sections of their application and attest before submitting any supporting documents. The guide specifies that the portal will create slots for documents based on the practitioner’s profile information. It also highlights the types of documents that may be required, such as the Washington State Release and Professional Liability Insurance. Additionally, the guide lists common reasons for document rejection, including issues with legibility, expiration, and mismatched details. Practitioners are advised to allow 2-3 business days for document review and approval, with notifications sent via email in case of rejection.