sevenChrNote: -The appropriate 7th character is to be added to each code from category X39 sevenChrDef: A - initial encounter D - subsequent encounter S - sequela
X39.0 - Exposure to natural radiation X39.01 - Exposure to radon X39.08 - Exposure to other natural radiation X39.8 - Other exposure to forces of nature
X39 - Exposure to other forces of nature