On the CMS-1500 claim form, Box 12 holds the patient's (or an authorized person's) signature and its date. By signing, the patient authorizes the release of any medical or other information necessary to process the claim. This guide explains what the box means and how Pabau fills it.
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 12 — Patient's signature
Box 12 has two parts: a Signed line and a Date line. It records the patient's release-of-information authorization — permission to share the medical information the payer needs to process the claim. In practice the box rarely carries a wet signature: the accepted convention is the text "Signature on File" (or "SOF"), meaning the practice holds the patient's signed authorization on record. Do not confuse it with Box 13, which is the insured's authorization — often the same person as the patient, but not always.
How Pabau fills it
Box 12 follows the Release of information field. You set it on the client's policy (it starts as Yes on a new US policy), Pabau copies it into the claim's Claim details section, and you can change it there for one claim. When it is Yes, the printed claim (Export > Print CMS-1500 form) shows SOF (signature on file) and the date in Box 12. When it is No, Pabau leaves Box 12 empty rather than claim an authorization the client never gave.
When the client has a completed consent form with a drawn signature in Pabau, the full-form print goes one better: it renders the client's actual signature image on the Signed line, together with the date the form was signed. The date is included because NUCC rules require a date to accompany a real signature.
NOTE: The text-only print never renders the signature image — it always keeps the SOF wording, so the values stay aligned with the cells of pre-printed red-ink CMS-1500 stock.
On the electronic claim: Claim.MD sends the release-of-information authorization itself, so the field changes only the printed form. Keep it accurate anyway, so that paper and electronic claims tell the payer the same thing.
TIP: Get consent forms signed at intake. A completed consent form with a drawn signature on the client's record is what puts a real signature — and its date — into Box 12 on the printed claim.
To print or export a claim, see Exporting and Submitting CMS1500 Claims Manually.