Box 16: Dates patient unable to work
By Dr. Daniel Turner, DC · Reviewed September 2, 2026
What goes in Box 16 of the CMS-1500?
The from and to dates of work disability, when the provider is certifying time off work. Empty on the vast majority of chiropractic claims.
What does Box 16 mean for chiropractic billing?
Relevant when work status intersects the case, most often workers compensation or a PI case with wage loss claims. If you complete it, the chart must support it, because those dates get read by more than the payer.
The mistakes that turn this box into denials
- ✗Casual date ranges the documentation does not support
How Cervica fills Box 16
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 10a to 10c · Is the condition related to employment, auto accident, or other accident
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.