Final answer:
Mapping ICD-9 code 346.90 to ICD-10 requires using the I-9 to I-10 General Equivalence Mappings (GEMs) file, which medical professionals consult to find corresponding codes. Without access to this file, the exact ICD-10 mapping cannot be provided.
Step-by-step explanation:
The question refers to the mapping of a medical code from the International Classification of Diseases, 9th Revision (ICD-9) to the International Classification of Diseases, 10th Revision (ICD-10) using the General Equivalence Mappings (GEMs). The specific code in question, 346.90, pertains to migraine without aura, not intractable, without mention of status migrainosus. Mappings from ICD-9 to ICD-10 can sometimes yield more than one result, especially when the ICD-9 code covers a broader spectrum of conditions compared to the more specific ICD-10.
To perform the mapping, one would consult the I-9 to I-10 GEMs file, which provides a crosswalk for correspondence between codes. However, without the actual GEMs file, we cannot give a definitive ICD-10 code mapping. Generally, professional medical coders use these GEMs files alongside their coding knowledge to correctly transition from ICD-9 to ICD-10.