CO-182 — Modifier invalid on the date of service
Claim-adjustment reason code 182 · typically reported as CO-182
What it means
A modifier on the line wasn’t valid for that date — retired, not yet active, or never valid with this code.
Why DME claims hit it
- Retired modifiers cached in billing templates
- Competitive-bidding-era modifiers used after program changes
How to fix it
- Validate the modifier set against the current HCPCS modifier file; correct and resubmit
Appeal posture
No — data fix.
Related denial codes
CO-4 — Modifier missing or inconsistent with the procedureCO-181 — Procedure code invalid on the date of service
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