ICD-10 Code J98.1 – Pulmonary collapse (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J98.1 – Pulmonary collapse
What it is
J98.1 identifies pulmonary collapse, meaning part of the lung has lost volume or failed to fully expand. Use it for documented collapse or atelectasis when the record supports this diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced breath sounds, decreased chest expansion, or imaging showing collapsed lung tissue.
When to use this code
Use J98.1 when the provider documents pulmonary collapse, lung collapse, or atelectasis as the diagnosis. It may also fit when imaging confirms collapse and the clinician links it to the patient’s condition. Check documentation if the record is unclear about cause or laterality.
Do not use for
Do not use this code for pneumothorax or other pleural air conditions unless pulmonary collapse is separately documented. If the note only describes a postoperative chest issue without a confirmed collapse diagnosis, check documentation.
Coding tip
Code the documented diagnosis exactly and query when “collapse” is mentioned without clear confirmation or clinical context.