2027 ICD-10-CM Diagnosis Code E20Hypoparathyroidism

ICD-10-CM Codes›E00–E89›E20-E35›E20

ICD-10-CM E20
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

E20 is a non-billable ICD-10-CM category code for hypoparathyroidism, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E20.0, E20.1, E20.810, and E20.811.

Code Identity

ICD-10-CM Code
E20
Billable Status
No — Non-Billable Category
Code Describes
Hypoparathyroidism
Short Description
Hypoparathyroidism
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
CategoryE20Hypoparathyroidism
This CodeE20Hypoparathyroidism

Specific Coding for HypoparathyroidismOverview

Non-specific codes like E20 require more characters. Use one of these billable codes instead:

  • Use E20.0 for Idiopathic hypoparathyroidism

  • Use E20.1 for Pseudohypoparathyroidism

  • E20.8 for Other hypoparathyroidism

  • E20.81 for Hypoparathyroidism due to impaired parathyroid hormone secretion

  • Use E20.89 for Other specified hypoparathyroidism

  • Use E20.9 for Hypoparathyroidism, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E20: 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 E20 itself
  • Di George's syndrome (D82.1)
  • postprocedural hypoparathyroidism (E89.2)
  • tetany NOS (R29.0)
  • transitory neonatal hypoparathyroidism (P71.4)
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 E20, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming E20: they are not reported together with it, unless the two conditions are unrelated.

  • E83 Disorders of mineral metabolism
    parathyroid disorders (E20-E21)

Code First 3

These codes say to code first a condition named in the note, and E20 is one of the conditions named.

  • G63 Polyneuropathy in diseases classified elsewhere
    endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)
  • G73.7 Myopathy in diseases classified elsewhere
    hypoparathyroidism (E20.-)
  • H28 Cataract in diseases classified elsewhere
    hypoparathyroidism (E20.-)

Notes 1

These notes mention E20.

  • Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases
    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. names E16-E31, which includes this code

Clinical InformationClinical

  • Hypoparathyroidism

    a condition caused by a deficiency of parathyroid hormone (or pth). it is characterized by hypocalcemia and hyperphosphatemia. hypocalcemia leads to tetany. the acquired form is due to removal or injuries to the parathyroid glands. the congenital form is due to mutations of genes, such as tbx1; (see digeorge syndrome); casr encoding calcium-sensing receptor; or pth encoding parathyroid hormone.

Patient EducationClinical

Parathyroid Disorders

Most people have four pea-sized glands, called parathyroid glands, on the thyroid gland in the neck. Though their names are similar, the thyroid and parathyroid glands are completely different. The parathyroid glands make parathyroid hormone (PTH), which helps your body keep the right balance of calcium and phosphorous.

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 E20Overview

What is the ICD-10 code for hypoparathyroidism?

E20 is the ICD-10-CM category for hypoparathyroidism, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is E20 (Hypoparathyroidism) a billable code?

No. This is a category header that groups the codes for hypoparathyroidism, and headers cannot be submitted on claims. Claims for hypoparathyroidism need a more specific code from this category, such as E20.0, E20.1, and E20.810.

Can E20 be reported with D82.1?

Not as a rule. The Excludes1 note on E20 lists "Di George's syndrome (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).