2027 ICD-10-CM Diagnosis Code E01Iodine-deficiency related thyroid disorders and allied conditions

ICD-10-CM Codes›E00–E89›E00-E07›E01

ICD-10-CM E01
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

E01 is a non-billable ICD-10-CM category code for iodine-deficiency related thyroid disorders and allied conditions, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E01.0, E01.1, E01.2, and E01.8.

Code Identity

ICD-10-CM Code
E01
Billable Status
No — Non-Billable Category
Code Describes
Iodine-deficiency related thyroid disorders and allied conditions
Short Description
Iodine-deficiency related thyroid disorders and allied cond
Chapter
E00-E07
Disorders of thyroid gland

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE00-E07Disorders of thyroid gland
CategoryE01Iodine-deficiency related thyroid disorders and allied conditions
This CodeE01Iodine-deficiency related thyroid disorders and allied conditions

Specific Coding for Iodine-deficiency related thyroid disorders and allied condOverview

Non-specific codes like E01 require more characters. Use one of these billable codes instead:

  • Use E01.0 for Iodine-deficiency related diffuse (endemic) goiter

  • Use E01.1 for Iodine-deficiency related multinodular (endemic) goiter

  • Use E01.2 for Iodine-deficiency related (endemic) goiter, unspecified

  • Use E01.8 for Other iodine-deficiency related thyroid disorders and allied conditions

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E01: 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 E01 itself
  • congenital iodine-deficiency syndrome (E00.-)
  • subclinical iodine-deficiency hypothyroidism (E02)
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 E01, its category, or a range that includes it.

Applicable To 1

These notes mention E01.

  • 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

Excludes1 3

These codes carry an Excludes1 note naming E01: they are not reported together with it, unless the two conditions are unrelated.

  • E03 Other hypothyroidism
    iodine-deficiency related hypothyroidism (E00-E02) names E00-E02, which includes this code
  • E04 Other nontoxic goiter
    iodine-deficiency related goiter (E00-E02) names E00-E02, which includes this code
  • E61 Deficiency of other nutrient elements
    iodine deficiency related thyroid disorders (E00-E02) names E00-E02, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming E01: its condition is not part of those codes, and both may be reported when the patient has both.

  • Q86 Congenital malformation syndromes due to known exogenous causes, not elsewhere classified
    iodine-deficiency-related hypothyroidism (E00-E02) names E00-E02, which includes this code

Code First 5

These codes say to code first a condition named in the note, and E01 is one of the conditions named.

  • 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 E01 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

Thyroid Diseases

Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions. For example, they affect your breathing, heart rate, weight, digestion, and moods.

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 E01Overview

What is the ICD-10 code for iodine-deficiency related thyroid disorders and allied conditions?

E01 is the ICD-10-CM category for iodine-deficiency related thyroid disorders and allied conditions, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is E01 a billable code?

No. This is a category header that groups the codes for iodine-deficiency related thyroid disorders and allied conditions, and headers cannot be submitted on claims. Claims for iodine-deficiency related thyroid disorders and allied conditions need a more specific code from this category, such as E01.0, E01.1, and E01.2.

Can E01 be reported with a code from E00?

Not as a rule. The Excludes1 note on E01 lists "congenital iodine-deficiency syndrome (E00.-)". 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).