| Recommended Mapping (based on statistical analysis) |
| Source ICD-9 | Mapping Type | Target ICD-10 |
| 9850 (Diagnosis) - Toxic effect mercury (Toxic effect of mercury and its compounds) with E8661 (Diagnosis) - Acc poisoning-mercury (Accidental poisoning by mercury and its compounds and fumes) | Cluster To Single | T561X1A (Diagnosis) - Toxic effect of mercury and its compounds, accidental, init (Toxic effect of mercury and its compounds, accidental (unintentional), initial encounter) |
| CMS/CDC General Equivalence Mappings |
| 9850 (Diagnosis) - Toxic effect mercury (Toxic effect of mercury and its compounds) with E8661 (Diagnosis) - Acc poisoning-mercury (Accidental poisoning by mercury and its compounds and fumes) | Cluster To Single | Alternative #1: T561X1A (Diagnosis) - Toxic effect of mercury and its compounds, accidental, init (Toxic effect of mercury and its compounds, accidental (unintentional), initial encounter) |