BWC's valid and invalid International Classification of Diseases (ICD-9) codes
BWC approves treatment in workers’ compensation claims for specific allowed conditions, which is why we recognize the current
version of the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) and use its diagnosis
codes to identify medical conditions being treated. You must bill the diagnosis code for the condition you are treating and
always follow acceptable ICD-9 coding principles.
Even if you know BWC has not formally allowed the condition in the claim, the managed care organization (MCO) has the
discretion and responsibility to coordinate treatment and make reimbursement decisions. If you have any questions about the
claim status, including diagnosis information, contact the MCO managing the claim or check the
claim status online.
BWC accepts V codes for the principal diagnosis on both inpatient and outpatient bills. However, we do not accept E codes for
the principal diagnosis, nor do we recognize these codes for allowance or reimbursement purposes.
BWC has established a comprehensive list of invalid (ICD-9) codes, which, for workers’ compensation purposes, are either
non-specific or not applicable to work-related injuries. You can download a list of BWC’s invalid ICD-9 codes,
or order a copy online.