2027 ICD-10-CM Diagnosis Code E03Other hypothyroidism

ICD-10-CM Codes›E00–E89›E00-E07›E03

ICD-10-CM E03
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Other hypothyroidism
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E03: its own notes plus those printed at Chapter 4. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On E03 itself
  • iodine-deficiency related hypothyroidism (E00-E02)
  • postprocedural hypothyroidism (E89.0)
From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Notes

General instructions on how these codes are used.

From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name E03, its category, or a range that includes it.

Applicable To 1

These notes mention E03.

  • Z83.4 Family history of other endocrine, nutritional and metabolic diseases
    Conditions classifiable to E00-E07, E15-E88 names E00-E07, which includes this code

Code First 7

These codes say to code first a condition named in the note, and E03 is one of the conditions named.

  • G13.2 Systemic atrophy primarily affecting the central nervous system in myxedema
    hypothyroidism (E03.-)
  • H28 Cataract in diseases classified elsewhere
    myxedema (E03.-)
  • D63.8 Anemia in other chronic diseases classified elsewhere
    hypothyroidism (E00.0-E03.9) names E00.0-E03.9, which includes this code
  • F02 Dementia in other diseases classified elsewhere
    hypothyroidism, acquired (E00-E03.-) names E00-E03, which includes this code
  • G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere
    cerebral degeneration (due to) hypothyroidism (E00.0-E03.9) names E00.0-E03.9, which includes this code
  • G63 Polyneuropathy in diseases classified elsewhere
    endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34) names E00-E07, which includes this code
  • M14.8 Arthropathies in other specified diseases classified elsewhere
    hypothyroidism (E00-E03) names E00-E03, which includes this code

Code Also 1

These codes say E03 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • I27.29 Other secondary pulmonary hypertension
    hypothyroidism (E00-E03) names E00-E03, which includes this code

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About E03Overview

What is the ICD-10 code for other hypothyroidism?

E03 is the ICD-10-CM category for other hypothyroidism, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can E03 be reported with E89.0?

Not as a rule. The Excludes1 note on E03 lists "postprocedural hypothyroidism (E89.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).