| R88 | Abnormal findings in other body fluids and substances |
| R880 | Cloudy (hemodialysis) (peritoneal) dialysis effluent |
| R888 | Abnormal findings in other body fluids and substances |
| R89 | Abnormal findings in specimens from other organs, systems and tissues |
| R890 | Abnormal level of enzymes in specimens from other organs, systems and tissues |
| R891 | Abnormal level of hormones in specimens from other organs, systems and tissues |
| R892 | Abnormal level of other drugs, medicaments and biological substances in specimens from other organs, systems and tissues |
| R893 | Abnormal level of substances chiefly nonmedicinal as to source in specimens from other organs, systems and tissues |
| R894 | Abnormal immunological findings in specimens from other organs, systems and tissues |
| R895 | Abnormal microbiolog findings in specimens from oth org/tiss Abnormal microbiological findings in specimens from other organs, systems and tissues |
| R896 | Abnormal cytological findings in specimens from oth org/tiss Abnormal cytological findings in specimens from other organs, systems and tissues |
| R897 | Abnormal histological findings in specimens from other organs, systems and tissues |
| R898 | Other abnormal findings in specimens from other organs, systems and tissues |
| R899 | Unspecified abnormal finding in specimens from other organs, systems and tissues |
| R90 | Abnormal findings on diagnostic imaging of central nervous system |
| R900 | Intracranial space-occupying lesion found on diagnostic imaging of central nervous system |
| R908 | Other abnormal findings on diagnostic imaging of central nervous system |
| R9081 | Abnormal echoencephalogram |
| R9082 | White matter disease, unspecified |
| R9089 | Other abnormal findings on diagnostic imaging of central nervous system |
| R91 | Abnormal findings on diagnostic imaging of lung |
| R911 | Solitary pulmonary nodule |
| R918 | Other nonspecific abnormal finding of lung field |
| R92 | Abnormal and inconclusive findings on diagnostic imaging of breast |
| R920 | Mammographic microcalcification found on diagnostic imaging of breast |
| R921 | Mammographic calcification found on diagnostic imaging of breast |
| R922 | Inconclusive mammogram |
| R923 | Mammographic density found on imaging of breast |
| R9230 | Dense breasts, unspecified |
| R9231 | Mammographic fatty tissue density of breast |
| R92311 | Mammographic fatty tissue density, right breast |
| R92312 | Mammographic fatty tissue density, left breast |
| R92313 | Mammographic fatty tissue density, bilateral breasts |
| R9232 | Mammographic fibroglandular density of breast |
| R92321 | Mammographic fibroglandular density, right breast |
| R92322 | Mammographic fibroglandular density, left breast |
| R92323 | Mammographic fibroglandular density, bilateral breasts |
| R9233 | Mammographic heterogeneous density of breast |
| R92331 | Mammographic heterogeneous density, right breast |
| R92332 | Mammographic heterogeneous density, left breast |
| R92333 | Mammographic heterogeneous density, bilateral breasts |
| R9234 | Mammographic extreme density of breast |
| R92341 | Mammographic extreme density, right breast |
| R92342 | Mammographic extreme density, left breast |
| R92343 | Mammographic extreme density, bilateral breasts |
| R928 | Other abnormal and inconclusive findings on diagnostic imaging of breast |
| R93 | Abnormal findings on diagnostic imaging of other body structures |
| R930 | Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified |
| R931 | Abnormal findings on diagnostic imaging of heart and coronary circulation |
| R932 | Abnormal findings on diagnostic imaging of liver and biliary tract |