Other chronic lung allograft dysfunction

This code signifies chronic deterioration of lung function in a patient who has undergone a lung transplant, specifically when the dysfunction does not fit into the more specific categories of bronchiolitis obliterans syndrome (BOS) or restrictive allograft syndrome (RAS). It encompasses various forms of chronic rejection or other long-term complications affecting the transplanted lung.

Use this code when documentation clearly indicates chronic lung allograft dysfunction that is not classified as BOS or RAS. This often includes conditions like chronic antibody-mediated rejection, vascular remodeling, or other undefined chronic allograft pathologies. Supporting documentation should detail the chronic nature of the dysfunction, its impact on lung function, and rule out other specific forms of rejection.

• Always sequence this code after the primary diagnosis indicating the specific type of chronic lung allograft dysfunction, if known and more specific.
• Distinguish carefully between acute and chronic allograft dysfunction; this code is exclusively for chronic forms.
• Ensure documentation specifies "other" or "unspecified" chronic dysfunction if BOS or RAS are not explicitly diagnosed or ruled out.