2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders 240-279 > Disorders Of Thyroid Gland 240-246 > Other Disorders Of Thyroid 246.* > 2008 ICD-9-CM Diagnosis 246.2 Cyst of thyroid  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 246.2 can be accessed here. Abnormal fluid filled sac within the thyroid gland. 246.2 is a specific code that can be used to specify a diagnosis 246.2 contains 1 index entry View the ICD-9-CM Volume 1 246.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 246.2 excludes: cystadenoma of thyroid (226) Index entries containing 246.2: Cyst (mucus) (retention) (serous) (simple) thyroid (gland) 246.2 adenomatous - see Goiter, nodular colloid (see also Goiter) 240.9