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J93.9 — Pneumothorax, unspecified
J93.9
What this code means
A pneumothorax is a collapsed lung caused by air leaking into the space between the lung and chest wall.
Also called: pneumothorax, collapsed lung.
When this code is used
Used for pneumothorax when the type is not specified.
Where it sits in ICD-10-CM
Code J93.9 belongs to Chapter 10: Diseases of the respiratory system, which covers codes J00–J99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Related symptoms
Related anatomy
Watch: related videos
Frequently asked questions
What is ICD-10-CM code J93.9?
J93.9 is the ICD-10-CM diagnosis code for “Pneumothorax, unspecified”. A pneumothorax is a collapsed lung caused by air leaking into the space between the lung and chest wall.
When is code J93.9 used?
Used for pneumothorax when the type is not specified. It belongs to Chapter 10 of ICD-10-CM (Diseases of the respiratory system).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.