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CP-575 Letter
This IRS-issued letter confirms your EIN and legal business name. Learn why it matters and how to find a copy for credentialing.
What is a CP-575 Letter?
A CP-575 letter is an official document issued by the Internal Revenue Service (IRS) to confirm that a business has been assigned an Employer Identification Number (EIN). This letter serves as proof of your business’s EIN and legal name.
Why Do Insurance Payors Require a CP-575?
During the provider credentialing process, insurance companies verify that your EIN and business name exactly match the records held by the IRS. The CP-575 is the primary document used for this verification.
If there are any discrepancies—such as a missing comma, different abbreviations, or an outdated business name—your application may be delayed or rejected. This can lead to delays in enrollment and payment processing.
How to Find Your CP-575 Letter
If your organization applied for an EIN, the IRS sent the CP-575 to the address on file at the time of registration. You may find a copy in your:
What If You Lost Your CP-575?
The IRS does not reissue CP-575 letters. If you no longer have it, you must request a replacement document called a 147C Letter.
How to Request a 147C Letter from the IRS
To obtain a 147C Letter (which serves the same verification purpose as a CP-575), follow these steps:
Processing Time Warning:
The 147C Letter can take up to 4–6 weeks to arrive. If you’re missing your CP-575, request a 147C Letter as soon as possible to avoid credentialing delays.
Common Issues That Cause Delays
To prevent problems, make sure your CP-575:
Best Practices for Credentialing
Need Help or Have a Question?
We know that credentialing doesn’t always follow a script. If something’s unclear or not covered here, reach out—we’re here to help.
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