Payment denied when performed by the same or similar provider

What CO-57 means

The payer denied payment because the service was rendered by the same provider (or a provider in the same group/specialty) as another service billed the same day, triggering a global or mutual-exclusivity edit. Often overturnable with documentation that the services were distinct.

Common causes

• Two services billed the same day by the same provider triggered a global package edit
• Evaluation and management (E/M) service denied when a procedure was also billed without Modifier 25
• Separate, identifiable services not documented as distinct

How to appeal CO-57

If the services were genuinely separate, add Modifier 25 to the E/M or Modifier 59 to the secondary procedure, document the distinct medical decision-making, and appeal citing the specific clinical circumstances that required both services.