On the CMS-1500 claim form, Box 25 carries the federal tax identification number of the entity being paid for the services on the claim — the billing provider — along with a checkbox marking the number as an SSN or an EIN. This guide explains what the box means and where Pabau takes the value from.
NOTE: This article is part of the US Insurance Billing Additional Resources series, which walks through every box of the CMS-1500. If you are new to claims in Pabau, start with Creating a US Professional (CMS 1500) Claim.
Box 25 — Federal Tax ID Number
Box 25 holds the federal tax ID the payer reports payments against: exactly nine digits, with no dashes or spaces. Next to the number, either SSN (Social Security Number) or EIN (Employer Identification Number) is marked to show which kind of number it is. Payers use it to tie the claim to the entity they pay, so a wrong or missing tax ID is one of the classic reasons a claim is delayed or rejected.
How Pabau fills it
The value comes from your practice's billing profile in Setup > Claims > Claim.MD > Billing profile: the Tax ID (9 digits) field holds the number, and Tax ID type records whether it is an EIN or an SSN. Every claim uses this practice-level billing profile, so you set it once and never enter the tax ID on individual claims.
On the printed form (Export > Print on the claim), Pabau prints the number in Box 25 and marks the matching SSN or EIN checkbox.
On the electronic claim: the tax ID and its EIN/SSN type are sent with the billing provider information — and because printed claims render from the same validated claim data, paper and electronic always match.
TIP: Enter the number exactly as your payers have it on file — nine digits only, no dashes — and double-check the Tax ID type. A tax ID that does not match your payer enrollment is a common cause of rejections.
The tax ID is one half of your billing identity — the billing provider's name, address, phone, and NPI live on the same Billing profile tab. To export or print claims for payers you bill on paper, see Exporting and Submitting CMS1500 Claims Manually.