DISORDERS OF THYROID GLAND (240-246)

• 240 Simple and unspecified goiter
  • 240.0 Goiter, specified as simple
    • Any condition classifiable to 240.9, specified as simple
  • 240.9 Goiter, unspecified
    • Enlargement of thyroid
    • Goiter or struma:
      • NOS
      • diffuse colloid
      • endemic
      • hyperplastic
      • nontoxic (diffuse)
      • parenchymatous
      • sporadic
    • Excludes: congenital (dyshormonogenic) goiter (246.1)
• 241 Nontoxic nodular goiter
  • Excludes: adenoma of thyroid (226)
    • cystadenoma of thyroid (226)
  • 241.0 Nontoxic uninodular goiter
    • Thyroid nodule
    • Uninodular goiter (nontoxic)
  • 241.1 Nontoxic multinodular goiter
    • Multinodular goiter (nontoxic)
  • 241.9 Unspecified nontoxic nodular goiter
    • Adenomatous goiter
    • Nodular goiter (nontoxic) NOS
    • Struma nodosa (simplex)
• 242 Thyrotoxicosis with or without goiter
  • Excludes: neonatal thyrotoxicosis (775.3)
  • The following fifth-digit subclassification is for use with category 242:
    • 0 without mention of thyrotoxic crisis or storm
    • 1 with mention of thyrotoxic crisis or storm
    • 242.0 Toxic diffuse goiter
      • Basedow's disease
      • Exophthalmic or toxic goiter NOS
      • Graves' disease
      • Primary thyroid hyperplasia
    • 242.1 Toxic uninodular goiter
      • Thyroid nodule, toxic or with hyperthyroidism
      • Uninodular goiter, toxic or with hyperthyroidism
    • 242.2 Toxic multinodular goiter
      • Secondary thyroid hyperplasia
    • 242.3 Toxic nodular goiter, unspecified
      • Adenomatous goiter, toxic or with hyperthyroidism
      • Nodular goiter, toxic or with hyperthyroidism
      • Struma nodosa, toxic or with hyperthyroidism
      • Any condition classifiable to 241.9 specified as toxic or with hyperthyroidism
    • 242.4 Thyrotoxicosis from ectopic thyroid nodule
    • 242.8 Thyrotoxicosis of other specified origin
      • Overproduction of thyroid-stimulating hormone [TSH]
      • Thyrotoxicosis:
        • factitia from ingestion of excessive thyroid material
      • Use additional E code to identify cause, if drug-induced
    • 242.9 Thyrotoxicosis without mention of goiter or other cause
      • Hyperthyroidism NOS
      • Thyrotoxicosis NOS
• 243 Congenital hypothyroidism
  • Congenital thyroid insufficiency
  • Cretinism (athyrotic) (endemic)
  • Use additional code to identify associated mental retardation
  • Excludes: congenital (dyshormonogenic) goiter (246.1)
• 244 Acquired hypothyroidism
  • Includes: athyroidism (acquired)
    • hypothyroidism (acquired)
    • myxedema (adult) (juvenile)
    • thyroid (gland) insufficiency (acquired)
  • 244.0 Postsurgical hypothyroidism
  • 244.1 Other postablative hypothyroidism
    • Hypothyroidism following therapy, such as irradiation
  • 244.2 Iodine hypothyroidism
    • Hypothyroidism resulting from administration or ingestion of iodide
    • Use additional E code to identify drug
  • 244.3 Other iatrogenic hypothyroidism
    • Hypothyroidism resulting from:
      • P-aminosalicylic acid [PAS]
      • Phenylbutazone
      • Resorcinol
    • Iatrogenic hypothyroidism NOS
    • Use additional E code to identify drug
  • 244.8 Other specified acquired hypothyroidism
    • Secondary hypothyroidism NEC
  • 244.9 Unspecified hypothyroidism
    • Hypothyroidism, primary or NOS
    • Myxedema, primary or NOS
• 245 Thyroiditis
  • 245.0 Acute thyroiditis
    • Abscess of thyroid
    • Thyroiditis:
      • nonsuppurative, acute
      • pyogenic
      • suppurative
    • Use additional code to identify organism
  • 245.1 Subacute thyroiditis
    • Thyroiditis:
      • de Quervain's
      • giant cell
      • granulomatous
      • viral
  • 245.2 Chronic lymphocytic thyroiditis
    • Hashimoto's disease
    • Struma lymphomatosa
    • Thyroiditis:
      • autoimmune
      • lymphocytic (chronic)
  • 245.3 Chronic fibrous thyroiditis
    • Struma fibrosa
    • Thyroiditis:
      • invasive (fibrous)
      • ligneous
      • Riedel's
  • 245.4 Iatrogenic thyroiditis
    • Use additional E code to identify cause
  • 245.8 Other and unspecified chronic thyroiditis
    • Chronic thyroiditis:
      • NOS
      • nonspecific
  • 245.9 Thyroiditis, unspecified
    • Thyroiditis NOS
• 246 Other disorders of thyroid
  • 246.0 Disorders of thyrocalcitonin secretion
    • Hypersecretion of calcitonin or thyrocalcitonin
  • 246.1 Dyshormonogenic goiter
    • Congenital (dyshormonogenic) goiter
    • Goiter due to enzyme defect in synthesis of thyroid hormone
    • Goitrous cretinism (sporadic)
  • 246.2 Cyst of thyroid
    • Excludes: cystadenoma of thyroid (226)
  • 246.3 Hemorrhage and infarction of thyroid
  • 246.8 Other specified disorders of thyroid
    • Abnormality of thyroid-binding globulin
    • Atrophy of thyroid
    • Hyper-TBG-nemia
    • Hypo-TBG-nemia
  • 246.9 Unspecified disorder of thyroid