2026 ICD-10-CM Diagnosis Code E03Other hypothyroidism

ICD-10-CM Codes›E00–E89›E00-E07›E03

ICD-10-CM E03
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E03 is a non-billable ICD-10-CM category code for other hypothyroidism, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E03.0, E03.1, E03.2, and E03.3.

Code Identity

ICD-10-CM Code
E03
Billable Status
No — Non-Billable Category
Code Describes
Other hypothyroidism
Chapter
E00-E07
Disorders of thyroid gland

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE00-E07Disorders of thyroid gland
CategoryE03Other hypothyroidism
This CodeE03Other hypothyroidism

Specific Coding for Other hypothyroidismOverview

Non-specific codes like E03 require more characters. Use one of these billable codes instead:

  • Use E03.0 for Congenital hypothyroidism with diffuse goiter

  • Use E03.1 for Congenital hypothyroidism without goiter

  • Use E03.2 for Hypothyroidism due to medicaments and other exogenous substances

  • Use E03.3 for Postinfectious hypothyroidism

  • Use E03.4 for Atrophy of thyroid (acquired)

  • Use E03.5 for Myxedema coma

  • Use E03.8 for Other specified hypothyroidism

  • Use E03.9 for Hypothyroidism, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

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

Clinical InformationClinical

  • 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.

Patient EducationClinical

Hypothyroidism

Hypothyroidism, or underactive thyroid, happens when your thyroid gland doesn't make enough thyroid hormones to meet your body's needs.

The full article covers:

  • What is hypothyroidism?
  • What causes hypothyroidism?
  • Who is at risk for hypothyroidism?
  • What are the symptoms of hypothyroidism?
  • What other problems can hypothyroidism cause?
  • How is hypothyroidism diagnosed?
  • What are the treatments for hypothyroidism?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E03Overview

Is E03 (Other hypothyroidism) a billable code?

No. This is a category header that groups the codes for other hypothyroidism, and headers cannot be submitted on claims. Claims for other hypothyroidism need a more specific code from this category, such as E03.0, E03.1, and E03.2.