ICD-10-CM > E00-E89 > E00-E07 > E05 > E05.4 E05.4 Thyrotoxicosis factitia Non-Billable/Non-Specific Codes E05.40Thyrotoxicosis factitia without thyrotoxic crisis or stormE05.41Thyrotoxicosis factitia with thyrotoxic crisis or storm