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203
CO - Contractual ObligationCoding/Billing
Denial Code CO-203: Discontinued/Reduced Service
What Does Code 203 Mean?
Service was discontinued or reduced. The procedure was not completed as planned, and payment is adjusted accordingly.
Group Code CO (Contractual Obligation): The provider has agreed to accept the payer's determination. The patient is generally not responsible for this amount.
Why Does This Happen?
A procedure was started but discontinued, or the service was reduced in scope.
How to Resolve It
- 1Use the appropriate modifier (-52 reduced, -53 discontinued)
- 2Document the reason for discontinuation
- 3Ensure proper coding reflects what was actually performed
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