CO 55 Denial Code: Experimental Treatment Solutions
Code 55 indicates that the payer has classified the procedure, treatment, or drug as experimental or investigational, which means it does not meet their coverage criteria. This decision is typically based on the payer's assessment of the medical necessity or lack of established efficacy for the service in question.
Who Pays: Group Code Liability
For denial code 55, the group code can be CO if the payer's policy explicitly excludes experimental treatments from coverage, meaning the provider must write it off. Alternatively, it can be PR if the patient's plan allows billing the patient for non-covered services, making it their responsibility.
Why Claims Get Code 55
- The service is new and lacks sufficient clinical evidence for effectiveness.
- The payer's medical policy does not recognize the service as standard care.
- The procedure is still under clinical trial and not yet approved for general use.
- The provider failed to submit sufficient documentation to justify the procedure's necessity.
- The payer's policy explicitly excludes the service as investigational.
How to Fix & Resubmit
- Verify the payer's policy on experimental and investigational treatments to confirm if the service is indeed not covered.
- Check the 835 Healthcare Policy Identification Segment for more details on the payer's rationale.
- Gather additional clinical documentation that supports the treatment's necessity and efficacy.
- Contact the payer to discuss the denial and inquire about any possible exceptions or allowances.
- Submit a formal appeal with additional supporting documentation if the service should be covered based on medical necessity.
Corrected Claim or Appeal?
If the service is deemed investigational per payer policy, an appeal with strong clinical justification may be necessary. Submit a corrected claim only if initial submission errors contributed to the denial.
Preventing Future 55 Denials
- Ensure thorough documentation of medical necessity and efficacy for services that may be considered experimental.
- Stay updated on payer policies regarding experimental treatments to avoid non-coverage.
- Consult with the payer's policy guidelines before providing services that are new or uncommon.
- Communicate with the patient about potential coverage issues for experimental treatments before proceeding.