ICD-10-CM > S00-T88 > T36-T50 > T48 > T48.9 > T48.90 > T48.905 T48.905 Adverse effect of unspecified agents primarily acting on the respiratory system Non-Billable/Non-Specific Codes T48.905A..., initial encounterT48.905D..., subsequent encounterT48.905S..., sequela