51Denial Code (CARC)Active
Effective 01/01/1995 · Updated 07/01/2017

PR 51 Denial Code - Non-Covered Pre-Existing Condition

Code 51 indicates that the services billed are not covered because they are related to a pre-existing condition. On your remittance, this means the payer has determined that the patient's policy excludes coverage for these services due to this pre-existing condition clause.

Who Pays: Group Code Liability

With code 51, the group code is typically PR, meaning the patient is responsible for these charges. You may bill the patient for these non-covered services, as they fall outside the payer's obligations.

Why Claims Get Code 51

  • The patient's insurance policy contains a pre-existing condition exclusion clause.
  • The services provided are directly related to a condition that existed before the patient's insurance coverage began.
  • The payer's records indicate a pre-existing condition that matches the services billed.
  • The claim did not include documentation to prove the condition was not pre-existing.
  • The patient's coverage start date overlaps with the treatment date of the condition.

How to Fix & Resubmit

  1. Verify the patient's policy details to confirm the pre-existing condition exclusion.
  2. Review the patient's medical history to ensure accurate information was provided to the payer.
  3. Check if there is documentation available that proves the condition is not pre-existing and resubmit with this proof.
  4. Contact the payer to verify if additional information can be submitted to reconsider the denial.
  5. If the condition is indeed pre-existing, bill the patient for the services as they are responsible.

Corrected Claim or Appeal?

For code 51, if documentation can prove the condition is not pre-existing, submit a corrected claim. If the condition is confirmed pre-existing, billing the patient is appropriate as an appeal won't alter coverage policy.

Preventing Future 51 Denials

  • Ensure thorough documentation of the patient's medical history during registration.
  • Verify insurance start dates to identify potential pre-existing conditions before service.
  • Communicate with patients about their coverage limitations regarding pre-existing conditions.
  • Maintain accurate records to quickly provide evidence if a condition is disputed as pre-existing.