--- title: Box 22 – Resubmission Code and Original Reference Number description: What Box 22 of the CMS-1500 means, when to fill the resubmission code and payer reference on a paper claim, and how electronic corrections work. --- [Skip to content](https://support.pabau.com/en/pabau2/box-22-resubmission-code-and-original-reference-number#main-content) [![pabau logo white](https://support.pabau.com/hubfs/pabau%20logo%20white.svg)](https://support.pabau.com/en/pabau2?hsLang=en) Open main navigation Close main navigation - [Get Support](https://pabau.com/support-center/) [Get Support](https://pabau.com/support-center/) Pabau Knowledge Base - There are no suggestions because the search field is empty. 1. [Pabau Knowledge Base](https://support.pabau.com/en/pabau2?hsLang=en) 2. [Insurance Billing](https://support.pabau.com/en/pabau2/insurance-billing?hsLang=en) 3. [US Insurance Billing Additional Resources](https://support.pabau.com/en/pabau2/insurance-billing?hsLang=en#us-insurance-billing-additional-resources) # Box 22 – Resubmission Code and Original Reference Number On the CMS-1500 claim form, **Box 22** is only used when the claim relates to one you have already filed: the **resubmission code** tells the payer how to treat the new filing, and the **original reference number** identifies the earlier claim it corrects or voids. This guide explains what the box means and where Pabau takes the values 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](https://support.pabau.com/en/pabau2/creating-a-us-professional-cms-1500-claim?hsLang=en). ## Box 22 — Resubmission code and original reference number ![Box 22 of the CMS-1500 claim form with the resubmission code and original reference number cells](https://support.pabau.com/hubfs/Pabau%202%20Knowledge%20Base/cms1500-box22-form.png) Box 22 has two cells. The **resubmission code** is a claim frequency code: **7** asks the payer to replace a previously filed claim with this corrected one, and **8** asks the payer to void (cancel) it. The **Original Ref. No.** cell carries the claim control number the payer assigned when it processed the original claim — often called the payer's **ICN** — which you will find on the payer's EOB, ERA, or denial. On a first-time claim both cells stay empty: an empty Box 22 means an original submission. Payers set their own resubmission rules, so check the original claim's denial or the payer's guidance for how they want corrections filed. **How Pabau fills it** Both values live in the **Claim details** section of the claim (labelled with CMS-1500 boxes 10, 12, 13, 22, 23 and 27). **Resubmission code (box 22)** offers 7 (corrected claim) and 8 (void), and **Original reference no. (payer ICN)** takes the number from the payer's EOB or denial. ![The Claim details section of a Pabau claim with the Resubmission code (box 22) and Original reference no. (payer ICN) fields](https://support.pabau.com/hubfs/Pabau%202%20Knowledge%20Base/cms1500-box22-claim-details.png) On a new claim you leave both fields alone: Pabau prints nothing in Box 22, and the claim goes out as an original submission. The two fields are for **paper resubmissions** only. When you correct a claim and mail it again, set the resubmission code to 7 (or 8 to void the original), enter the payer's ICN in the original reference field, then print the claim and mail it. Pabau won't validate one field without the other. **On the electronic claim:** you don't fill these fields. When you correct a rejected or denied claim and send it through Claim.MD again, Pabau sets the correction code and the payer's claim number itself, and the two fields are ignored. Because Pabau reuses the same claim identity, Claim.MD updates the original claim instead of creating a duplicate. **TIP:** The original reference number is the payer's own control number, not a Pabau number. Take it from the EOB, ERA, or denial the payer returned for the original claim — the claim's response history is covered in [Tracking Electronic Claim Submissions](https://support.pabau.com/en/pabau2/tracking-electronic-claim-submissions?hsLang=en). 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