| Recommended Mapping (based on statistical analysis) |
| Source ICD-9 | Mapping Type | Target ICD-10 |
| 55091 (Diagnosis) - Recur unilat inguin hern (Inguinal hernia, without mention of obstruction or gangrene, unilateral or unspecified, recurrent) | Single To Single | K4091 (Diagnosis) - Unilateral inguinal hernia, w/o obst or gangrene, recurrent (Unilateral inguinal hernia, without obstruction or gangrene, recurrent) |
| CMS/CDC General Equivalence Mappings |
| 55091 (Diagnosis) - Recur unilat inguin hern (Inguinal hernia, without mention of obstruction or gangrene, unilateral or unspecified, recurrent) | Single To Single | Alternative #1: K4091 (Diagnosis) - Unilateral inguinal hernia, w/o obst or gangrene, recurrent (Unilateral inguinal hernia, without obstruction or gangrene, recurrent) |