Convert ICD-10 Code H49.40 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
H49.40 Progressive external ophthalmoplegia, unspecified eye		378.55 External ophthalmoplegia
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

ICD-10 to ICD-9 crosswalk for code H49.40 - progressive external ophthalmoplegia, unspecified eye based on the most recent General Equivalence Mappings (GEMS) information.