| ICD-10 Code | Description |
| R84.0 | Abnormal level of enzymes in specimens from respiratory organs and thorax |
| R84.1 | Abnormal level of hormones in specimens from respiratory organs and thorax |
| R84.2 | Abnormal level of other drugs, medicaments and biological substances in specimens from respiratory organs and thorax |
| R84.3 | Abnormal level of substances chiefly nonmedicinal as to source in specimens from respiratory organs and thorax |
| R84.4 | Abnormal immunological findings in specimens from respiratory organs and thorax |
| R84.5 | Abnormal microbiological findings in specimens from respiratory organs and thorax |
| R84.6 | Abnormal cytological findings in specimens from respiratory organs and thorax |
| R84.7 | Abnormal histological findings in specimens from respiratory organs and thorax |
| R84.8 | Other abnormal findings in specimens from respiratory organs and thorax |
| R84.9 | Unspecified abnormal finding in specimens from respiratory organs and thorax |
