For physicians, nurse practitioners, and physician assistants entering practice for the first time — or joining a new group — credentialing is the first administrative mountain to climb. It's also the one that most directly controls when you can start generating revenue for yourself or your practice. Until credentialing is complete, you're not billing at your full potential.
The typical credentialing timeline is 60-120 days for commercial payers and 90-180 days for Medicare enrollment. The practitioners who complete credentialing on the shorter end of those ranges aren't lucky — they're prepared. They had their documents ready before they started applying, they responded to verification requests within 24 hours, and they tracked every application with disciplined follow-through.
Before You Apply — The Document Gathering Phase
The single most common credentialing delay is incomplete applications that require multiple rounds of follow-up because supporting documents are missing or outdated. Before you submit anything, gather every document you'll need:
Medical school diploma and transcript. Residency and fellowship completion certificates. All current and expired medical licenses — every state where you've ever held a license. DEA registration certificate. Malpractice insurance certificate with $1M/$3M coverage (most payers require this minimum). Board certification certificates. Hospital privileges letters. Work history for the last 10 years with exact dates and contact information. Malpractice history declarations — five years of claims history. CV updated within the last three months.
The reason you need expired licenses and past employment information is that payers and hospitals will conduct primary source verification — they'll contact every institution you've listed and verify the information independently. Gaps, inconsistencies, or discrepancies between what you report and what primary sources report are among the leading causes of credentialing delays and denials.
CAQH ProView — Your Credentialing Hub
CAQH ProView is the central repository for provider credentialing data. The majority of commercial payers and many hospital systems draw credentialing information directly from your CAQH profile, which means a complete, accurate, up-to-date CAQH profile dramatically accelerates the credentialing process across all of your payers simultaneously.
Setting up CAQH for the first time takes 2-4 hours if you have all your documents ready. Work through every section completely — don't leave optional fields blank if they're relevant to your background. Upload clean, clear PDF scans of every required document. Set your profile to authorize all payers to access your data.
CAQH requires re-attestation every 120 days. Set a calendar reminder for 110 days from your initial setup — missing the re-attestation window causes your data to become inaccessible to payers, which can interrupt credentialing in progress.
Medicare Enrollment — PECOS and the NPI
Medicare enrollment is separate from commercial payer credentialing and must be completed through PECOS (Provider Enrollment, Chain, and Ownership System). Before you begin PECOS, ensure your National Provider Identifier (NPI) is active and all the information in NPPES (the NPI registry) exactly matches what you'll enter in PECOS. Name discrepancies between NPPES and PECOS are a common rejection trigger.
For individual providers, you'll complete a Form CMS-855I through PECOS. For group enrollment, a Form CMS-855B is required for the group. Both individual and group enrollment must be complete and linked before you can bill Medicare as part of the group.
Plan for 60-90 days for Medicare enrollment to complete. Submit your application as early as possible — ideally the day your employment start date is confirmed. Medicare enrollment is effective from the date CMS approves the application, not the date you submitted it.
Tracking Your Applications
Once you've submitted applications, tracking becomes the job. Create a spreadsheet with one row per payer and the following columns: payer name, application submission date, primary contact, application tracking number, current status, last follow-up date, next follow-up date, and approval date.
Follow up on every pending application every 5-7 business days. Don't wait for payers to contact you — they won't. Proactive follow-up finds applications that have stalled due to missing documents or verification issues that weren't communicated to you.
