147C Letter

A replacement IRS letter used to verify your EIN when the original CP-575 is unavailable.

What is a 147C Letter?

A 147C Letter is an official IRS document used to verify your organization’s Employer Identification Number (EIN). It confirms both your EIN and your legal business name, and it is commonly accepted as a substitute for the CP-575 when the original letter is unavailable.

Why Do Insurance Payors Accept a 147C Letter?

Credentialing teams need to ensure that your EIN and legal business name match IRS records exactly. If you no longer have your CP-575, the 147C Letter provides the same verification. Many payors, clearinghouses, and government agencies will accept it in place of the original CP-575.

How to Request a 147C Letter from the IRS

To request a 147C Letter, follow these steps:

• Call the IRS Business & Specialty Tax Line at 1-800-829-4933

• Select the option for EIN inquiries

• Be ready to verify your identity—you must be authorized to receive EIN information for the business

• Ask the representative to fax or mail a copy of your 147C Letter

The IRS does not email this letter

Be sure you have a working fax number or a valid business mailing address on file.

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.

When You Should Request One

If you:

• Never received your CP-575

• Can’t locate a copy

• Are opening new contracts and need immediate EIN verification

…then requesting a 147C is your fastest path forward.

Processing Time Warning

IRS faxed letters are often sent the same day, but mailed copies can take up to 4–6 weeks to arrive. If you’re in the middle of onboarding or preparing for credentialing, don’t wait—request a 147C Letter as soon as possible.

Best Practices for Credentialing

• Save the 147C Letter with your business records for future credentialing requests

• Make sure your W-9, banking info, NPI registration, and credentialing documents all match the EIN and name exactly

• Double-check for spelling, punctuation, or spacing inconsistencies—these small differences can delay your enrollment

Need Help or Have a Question?

[email protected] 800-799-3859 piehealthusa.com