ICD-10 Code J70.9 – Respiratory conditions due to unspecified external agent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J70.9 – Respiratory conditions due to unspecified external agent
What it is
J70.9 identifies a respiratory disorder caused by an external agent when the specific substance or exposure is not named. Use it for lung or airway conditions linked to a suspected outside cause, but with incomplete documentation.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include cough, shortness of breath, wheezing, or other evidence of respiratory irritation after exposure.
When to use this code
Use J70.9 when the record supports a respiratory condition due to an external agent, but the agent is unspecified. It is appropriate when the clinician documents an exposure-related lung problem without naming the cause. Code the condition only if the link to an external agent is clearly stated.
Do not use for
Do not use this code for ordinary asthma, infection, or chronic lung disease without an external cause. If the exposure or agent is identified, check documentation for a more specific code.
Coding tip
Query the provider when the respiratory condition is exposure-related but the agent is missing or unclear.