ICD-10-CM > E00-E89 > E00-E07 > E06 > E06.1 E06.1 Subacute thyroiditis Billable/Specific Copy Code Copy Description Applicable To de Quervain thyroiditisGiant-cell thyroiditisGranulomatous thyroiditisNonsuppurative thyroiditisViral thyroiditis Type 1 Excludes autoimmune thyroiditis (E06.3)