| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| G43919 (Diagnosis) - Migraine, unsp, intractable, without status migrainosus (Migraine, unspecified, intractable, without status migrainosus) | Single To Single | 34691 (Diagnosis) - Mgrn unsp w ntrc mgr std (Migraine, unspecified, with intractable migraine, so stated, without mention of status migrainosus) |
| CMS/CDC General Equivalence Mappings |
| G43919 (Diagnosis) - Migraine, unsp, intractable, without status migrainosus (Migraine, unspecified, intractable, without status migrainosus) | Single To Single | Alternative #1: 34691 (Diagnosis) - Mgrn unsp w ntrc mgr std (Migraine, unspecified, with intractable migraine, so stated, without mention of status migrainosus) |