We have a patient who is consistently exposed to silica dust on the job from the grinding of materials, and I'm trying to decide on the best ICD-10 code. I know there is Z57.2, "Occupational exposure to dust," but I'm leaning toward Z57.39, "Occupational exposure to other air contaminants," since it's not just dust, it's a specific (more dangerous) kind. Or should it be a "toxic agent" (Z57.5)? Can I get a second opinion on which of these would be most appropriate? Thank you!