Box 31: Signature of physician
By Dr. Daniel Turner, DC · Reviewed September 2, 2026
What goes in Box 31 of the CMS-1500?
The rendering provider’s signature and date, or its electronic equivalent, certifying the services were rendered as billed.
What does Box 31 mean for chiropractic billing?
Electronic claims satisfy this through the submission itself, but the certification is real: this box is the provider personally standing behind the claim. It is one more reason the note behind every claim should be one the provider would happily defend.
The mistakes that turn this box into denials
- ✗Thinking of it as a formality rather than a certification
How Cervica fills Box 31
Cervica generates the CMS-1500 and its electronic 837P equivalent from the chart and the payer's own rules: identifiers from the verified insurance record, modifiers and codes per payer, and pre submission scrubbing that flags exactly the mistakes listed above before a claim leaves the building.
Related boxes
- →Box 24A to 24J · The service lines
General information for billing teams, not billing advice for any individual claim. The NUCC's 1500 Claim Form instructions and each payer's companion guides control.