ICD-10-CM > E00-E89 > E00-E07 > E06 E06 Thyroiditis Non-Billable/Non-Specific Type 1 Excludes postpartum thyroiditis (O90.5) Codes E06.0Acute thyroiditisE06.1Subacute thyroiditisE06.2Chronic thyroiditis with transient thyrotoxicosisE06.3Autoimmune thyroiditisE06.4Drug-induced thyroiditisE06.5Other chronic thyroiditisE06.9Thyroiditis, unspecified