Abnormal Kco C5539542
An abnormal lung test measuring how well gases transfer between lungs and blood. Indicates potential lung disease. Further testing is needed to determine cause and treatment.
Key facts at a glance
- ICD-10
- J98.9
- ICD-11
- CA00.0
- Body system
- respiratory
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Chest discomfort
Exertional dyspnea
(respiratory)Shortness of breath or cough
(respiratory)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Reduced exercise tolerance
(respiratory)Dry cough
(respiratory)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Pulmonary function testing
Complete spirometry with diffusing capacity measurement to characterize the nature and severity of gas exchange abnormalities and guide management.
Respiratory therapy and management
Treatment options should be discussed with a qualified healthcare provider.
Smoking cessation program
Structured tobacco cessation including counseling and nicotine replacement support to eliminate a major cause of pulmonary function impairment.
Additional treatment options
Pulmonary rehabilitation
Supervised exercise training and breathing exercises to improve lung efficiency, endurance, and overall respiratory function.
physical_therapyBronchodilator therapy
Inhaled bronchodilators may be prescribed if airflow obstruction contributes to abnormal gas exchange, improving ventilation-perfusion matching.
medicationHigh-resolution CT chest
Detailed imaging to identify interstitial lung disease, emphysema, or other structural causes of abnormal diffusing capacity.
procedureWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Kco C5539542?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Graham BL, Brusasco V, Burgos F, et al. ERS/ATS Standards for Single-Breath Carbon Monoxide Uptake in the Lung. Eur Respir J. 2017.
Hughes JMB, van der Lee I. The Transfer Factor and Its Subcomponents. Semin Respir Crit Care Med. 2020.
Zavorsky GS, Hsia CCW, Hughes JMB, et al. Accuracy and Minimize Variability in KCO Measurements. Thorax. 2018.
Johnson DC, Lambert MJ, Wade RC. Pulmonary Gas Transfer in Interstitial Lung Disease: A Systematic Review. Chest. 2022.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy