1. Home
  2. ICD-10-CM Codes List
  3. E00–E89
  4. E00-E07
  5. Other hypothyroidism (E03)

Other hypothyroidism (E03)

The ICD-10 code section E03 covers "Other hypothyroidism," a group of thyroid disorders characterized by insufficient thyroid hormone production not classified elsewhere. These codes are used to specify various forms of hypothyroidism beyond primary causes, including congenital, drug-induced, and acquired conditions.

This section includes detailed codes like E03.0 for congenital hypothyroidism with diffuse goiter and E03.1 for congenital hypothyroidism without goiter, encompassing numerous genetic and developmental thyroid abnormalities. For example, congenital hypothyroidism may be referred to by synonyms such as "congenital iodine deficiency syndrome" or "thyroid atrophy," guiding coders to the appropriate diagnosis. Drug-induced hypothyroidism is captured under E03.2, addressing conditions caused by medications like amiodarone. Other specific types, including postinfectious hypothyroidism (E03.3), acquired thyroid atrophy (E03.4), and severe states like myxedema coma (E03.5), are also included. The code E03.8 covers other specified hypothyroidism types, such as postpartum hypothyroidism and autoimmune thyroid diseases. Finally, E03.9 is used for unspecified hypothyroidism when the exact cause is unclear. Understanding these codes helps ensure precise documentation and better communication about thyroid function disorders in medical records, billing, and treatment planning.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • iodine-deficiency related hypothyroidism E00 E02
  • postprocedural hypothyroidism E89.0

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Choanal Atresia

A congenital abnormality that is characterized by a blocked CHOANAE, the opening between the nose and the NASOPHARYNX. Blockage can be unilateral or bilateral; bony or membranous.

Congenital Hypothyroidism

A condition in infancy or early childhood due to an in-utero deficiency of THYROID HORMONES that can be caused by genetic or environmental factors, such as thyroid dysgenesis or HYPOTHYROIDISM in infants of mothers treated with THIOURACIL during pregnancy. Endemic cretinism is the result of iodine deficiency. Clinical symptoms include severe MENTAL RETARDATION, impaired skeletal development, short stature, and MYXEDEMA.

Hypothyroidism

A syndrome that results from abnormally low secretion of THYROID HORMONES from the THYROID GLAND, leading to a decrease in BASAL METABOLIC RATE. In its most severe form, there is accumulation of MUCOPOLYSACCHARIDES in the SKIN and EDEMA, known as MYXEDEMA. It may be primary or secondary due to other pituitary disease, or hypothalamic dysfunction.

Myxedema

A condition characterized by a dry, waxy type of swelling (EDEMA) with abnormal deposits of MUCOPOLYSACCHARIDES in the SKIN and other tissues. It is caused by a deficiency of THYROID HORMONES. The skin becomes puffy around the eyes and on the cheeks. The face is dull and expressionless with thickened nose and lips.

Scleromyxedema

A connective tissue disorder characterized by widespread thickening of SKIN with a cobblestone-like appearance. It is caused by proliferation of FIBROBLASTS and deposition of MUCIN in the DERMIS in the absence of thyroid disease. Most scleromyxedema cases are associated with a MONOCLONAL GAMMOPATHY, immunoglobulin IgG-lambda.