ICD-10-CM > E00-E89 > E00-E07 > E05 > E05.9 E05.9 Thyrotoxicosis, unspecified Non-Billable/Non-Specific Applicable To Hyperthyroidism NOS Codes E05.90Thyrotoxicosis, unspecified without thyrotoxic crisis or stormE05.91Thyrotoxicosis, unspecified with thyrotoxic crisis or storm