CO-153: Information Does Not Support Dosage

What Does CO-153 Mean?

With CO (Contractual Obligation), the CARC 153 denial for information does not support dosage is the provider's contractual responsibility. The patient is not liable for this amount. However, the provider may appeal with supporting clinical or administrative documentation if the denial is believed to be in error.

CARC 153 indicates information does not support dosage. The payer determined that the service or a portion of it does not meet coverage criteria under the patient's current plan benefits or the applicable coverage rules.

Common scenarios that trigger this adjustment include: the billed medication dosage exceeds the payer's maximum allowed dosage based on FDA labeling, clinical guidelines, or the payer's drug utilization review criteria; The clinical documentation does not adequately support the medical necessity for a dosage that exceeds standard guidelines or the payer's approved dosing parameters; The claim was submitted with incorrect units, quantities, or dosage amounts that do not match the actual medication administered. The group code paired with CARC 153 determines who bears the financial responsibility — CO places it on the provider as a contractual obligation, OA indicates a coordination of benefits or other payer adjustment, PR shifts it to the patient.

Common Causes

How to Resolve

1. Review the denial Examine the CO-153 denial and any RARC codes to understand the specific basis for the coverage determination.
2. Gather supporting documentation Collect medical records, clinical notes, authorization documents, or other evidence that supports the medical necessity or coverage of the denied service.
3. File the appeal Appeal with clinical documentation supporting the medical necessity of the dosage, including peer-reviewed literature, clinical practice guidelines, manufacturer dosing recommendations, patient weight for weight-based dosing, and evidence of prior treatment failures at lower doses if applicable.
4. Track the appeal outcome Monitor the appeal status and follow up as needed. If denied again, consider further levels of appeal if available.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-153:

How to Prevent CO-153

• Verify payer dosage guidelines before administering non-standard doses of medications
• Document clinical justification for any dosage that exceeds standard guidelines at the time of administration
• Use drug dosing reference tools to verify correct units and quantities before claim submission
• Implement pre-claim scrubbing that checks drug units and dosages against payer-specific limits
• For weight-based medications, document the patient's current weight and dosing calculation in the medical record
• Obtain prior authorization for dosages that exceed standard payer guidelines

Also Filed As

The same CARC 153 may appear with different Group Codes:

Related Denial Codes