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Convert ICD-10 Code G44.309 to ICD-9

Source ICD-10 Code Target ICD-9 Code
G44.309
Post-traumatic headache, unspecified, not intractable		339.20
Post-trauma headache NOS
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 G44.309 - post-traumatic headache, unspecified, not intractable based on the most recent General Equivalence Mappings (GEMS) information.