The following fourth-character subdivisions are for use with categories R83-R89:
| Code | Title |
|---|---|
| .0 |
Abnormal level of enzymes
|
| .1 |
Abnormal level of hormones
|
| .2 |
Abnormal level of other drugs, medicaments and biological substances
|
| .3 |
Abnormal level of substances chiefly nonmedicinal as to source
|
| .4 |
Abnormal immunological findings
|
| .5 |
Abnormal microbiological findings
|
| .6 |
Abnormal cytological findings
|
| .7 |
Abnormal histological findings
|
| .8 |
Other abnormal findings
|
| .9 |
Unspecified abnormal finding
|