ICD-10-CM > Q00-QA0 > Q80-Q89 > Q89 > Q89.2 Q89.2 Congenital malformations of other endocrine glands Billable/Specific Copy Code Copy Description Applicable To Congenital malformation of parathyroid or thyroid glandPersistent thyroglossal ductThyroglossal cyst Type 1 Excludes congenital goiter (E03.0)congenital hypothyroidism (E03.1)