ICD-10-CM > S00-T88 > T36-T50 > T38 > T38.8 > T38.80 > T38.806 T38.806 Underdosing of unspecified hormones and synthetic substitutes Non-Billable/Non-Specific Codes T38.806A..., initial encounterT38.806D..., subsequent encounterT38.806S..., sequela