Occurrence Codes on the UB-04

Key points

A correct occurrence code with the wrong date is still an incorrect claim element.
Occurrence codes use standardized meanings.
When multiple occurrence events are reported, make sure each entry belongs to this claim period and patient.

Code and date are one data point

A correct occurrence code with the wrong date is still an incorrect claim element. Verify the event and date together.

Do not substitute a narrative

Occurrence codes use standardized meanings. If a payer needs a different explanation or attachment, entering a vaguely related occurrence code is not a substitute.

Check for repeated events

When multiple occurrence events are reported, make sure each entry belongs to this claim period and patient.

Institutional-claim review

Treat an occurrence code and its associated date as one data element.
Verify the event date from the source record instead of estimating it from the billing period.
Remove stale occurrence information from copied claims.

Occurrence code and occurrence date must travel together

An occurrence code describes a defined event and is paired with a date. A valid code with the wrong date is still wrong, and a copied date from an earlier stay can be especially difficult to notice. Review the source event, the code definition, and the date as a unit. If multiple occurrence events are present, verify each one independently against the current institutional record.

Sources and verification

Use the CMS institutional-claim sources below for current CMS-1450/UB-04 guidance, then apply the payer’s rules for the facility claim.

Related guides

Try UB-04 software

For offices that prepare institutional paper claims, MedClaimSoftware’s dedicated UB-04 / CMS-1450 program can save and retrieve claims, support printing and alignment, and keep facility claim preparation in a focused Windows workflow. The software is $99/year for up to 2 computers, with a free downloadable trial. View UB-04 software.