Signature of provider - Box 31 CMS 1500

Item 31 - Enter the signature of provider of service or supplier, or his/her representative, and either the 6-digit date (MM | DD | YY), 8-digit date (MM | DD | CCYY), or alpha-numeric date (e.g., January 1, 1998) the form was signed.

In the case of a service that is provided incident to the service of a physician or non-physician practitioner, when the ordering physician or non-physician practitioner is directly supervising the service as in 42 CFR 410.32, the signature of the ordering physician or non-physician practitioner shall be entered in item 31. When the ordering physician or non-physician practitioner is not supervising the service, then enter the signature of the physician or non-physician practitioner providing the direct supervision in item 31.

NOTE: This is a required field, however the claim can be processed if the following is true. If a physician, supplier, or authorized person's signature is missing, but the signature is on file; or if any authorization is attached to the claim or if the signature field has "Signature on File" and/or a computer generated signature.