Convert ICD-10 Code M48.18 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
M48.18 Ankylosing hyperostosis, sacral and sacrococcygeal region		721.6 Ankyl vert hyperostosis
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 M48.18 - ankylosing hyperostosis [forestier], sacral and sacrococcygeal region based on the most recent General Equivalence Mappings (GEMS) information.