Accurate diagnosis within an multidisciplinary discussion is essential prior to establishing a management plan. Disease behaviour should also be identified, with frequent revision at follow-up assessments. This is particularly important for patients with ‘unclassifiable disease’ during multidisciplinary discussions. Immediate removal of the exposure is crucial in patients in whom exogenous agents are suspected of causing the ILD. Careful questioning of current or recent contact with environmental mould, birds, tobacco smoke and specific medications is important. In many cases, simply removing the inciting agent may be sufficient to bring about disease regression without the need for immune suppression.