2027 ICD-10-CM Diagnosis Code E32Diseases of thymus

ICD-10-CM Codes›E00–E89›E20-E35›E32

ICD-10-CM E32
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

E32 is a non-billable ICD-10-CM category code for diseases of thymus, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E32.0, E32.1, E32.8, and E32.9.

Code Identity

ICD-10-CM Code
E32
Billable Status
No — Non-Billable Category
Code Describes
Diseases of thymus
Short Description
Diseases of thymus
Same as the full description in the CMS dataset.
Chapter
E20-E35
Disorders of other endocrine glands

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE20-E35Disorders of other endocrine glands
CategoryE32Diseases of thymus
This CodeE32Diseases of thymus

Specific Coding for Diseases of thymusOverview

Non-specific codes like E32 require more characters. Use one of these billable codes instead:

  • Use E32.0 for Persistent hyperplasia of thymus

  • Use E32.1 for Abscess of thymus

  • Use E32.8 for Other diseases of thymus

  • Use E32.9 for Disease of thymus, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E32: its own notes plus those printed at block E20-E35 and 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 E32 itself
  • aplasia or hypoplasia of thymus with immunodeficiency (D82.1)
  • myasthenia gravis (G70.0)
From Block E20-E35 Disorders of other endocrine glands applies to 99 codes
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 E32, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and E32 is one of the conditions named.

  • G63 Polyneuropathy in diseases classified elsewhere
    endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34) names E20-E34, which includes this code

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 E32Overview

What is the ICD-10 code for diseases of thymus?

E32 is the ICD-10-CM category for diseases of thymus, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is E32 (Diseases of thymus) a billable code?

No. This is a category header that groups the codes for diseases of thymus, and headers cannot be submitted on claims. Claims for diseases of thymus need a more specific code from this category, such as E32.0, E32.1, and E32.8.

Can E32 be reported with D82.1?

Not as a rule. The Excludes1 note on E32 lists "aplasia or hypoplasia of thymus with immunodeficiency (D82.1)". 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).