Medicare PECOS Credentialing Checklist
Medicare PECOS Credentialing Checklist — 25-Item Interactive Guide
This free interactive checklist covers all 25 required steps for Medicare PECOS enrollment — from NPI registration and CAQH setup through CMS-855 form submission and billing activation. Use it to track your enrollment readiness, identify gaps before submission, and prevent the most common Medicare enrollment errors that cause 60–90 day delays.
Most Common Medicare Enrollment Errors
The five most common Medicare enrollment errors: (1) Missing CMS-855R reassignment form when billing under a group NPI; (2) Wrong MAC (Medicare Administrative Contractor) for your state; (3) NPI-NPPES address mismatch preventing verification; (4) Missing EFT (Electronic Funds Transfer) enrollment; (5) Incorrect taxonomy code selection. Each error adds 30–60 days to the enrollment timeline. Related: Medicare enrollment services | CAQH readiness tool.
The Five Checklist Items That Cause 80% of Delays
Of the 25 items, five do most of the damage when missed: (1) NPPES address alignment — your application must match NPPES exactly, so update NPPES first; (2) the CMS-855R reassignment — group-billing physicians without it are approved but unbillable; (3) correct MAC identification — each state has one assigned contractor and misdirected applications bounce weeks later; (4) CMS-588 EFT enrollment — without it, approvals exist but payments don't; (5) development-request monitoring — MACs allow ~30 days to respond and silence means rejection and restart.
Using the Checklist for Revalidation Too
The same checklist applies at Medicare revalidation (every 5 years): documents current, NPPES accurate, reassignments intact, and the revalidation notice answered by its deadline — missed revalidations deactivate billing privileges and create claim gaps that take months to unwind. Track your revalidation date the day you receive your PTAN. Medicare enrollment service | PECOS guide | revalidation management | get enrollment help.