2020 ICD-10-CM Diagnosis Code E20

Hypoparathyroidism

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • E20 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM E20 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of E20 - other international versions of ICD-10 E20 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as E20. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Di George's syndrome (
    ICD-10-CM Diagnosis Code D82.1

    Di George's syndrome

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Pharyngeal pouch syndrome
    • Thymic alymphoplasia
    • Thymic aplasia or hypoplasia with immunodeficiency
    D82.1
    )
  • postprocedural hypoparathyroidism (
    ICD-10-CM Diagnosis Code E89.2

    Postprocedural hypoparathyroidism

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Parathyroprival tetany
    E89.2
    )
  • tetany NOS (
    ICD-10-CM Diagnosis Code R29.0

    Tetany

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Carpopedal spasm
    Type 1 Excludes
    • hysterical tetany (F44.5)
    • neonatal tetany (P71.3)
    • parathyroid tetany (E20.9)
    • post-thyroidectomy tetany (E89.2)
    R29.0
    )
  • transitory neonatal hypoparathyroidism (
    ICD-10-CM Diagnosis Code P71.4

    Transitory neonatal hypoparathyroidism

      2016 2017 2018 2019 2020 Billable/Specific Code Code on Newborn Record
    P71.4
    )
The following code(s) above E20 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to E20:
  • E00-E89
    2020 ICD-10-CM Range E00-E89

    Endocrine, nutritional and metabolic diseases

    Note
    • 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.
    Type 1 Excludes
    • transitory endocrine and metabolic disorders specific to newborn (P70-P74)
    Endocrine, nutritional and metabolic diseases
  • E20-E35
    2020 ICD-10-CM Range E20-E35

    Disorders of other endocrine glands

    Type 1 Excludes
    Disorders of other endocrine glands
Clinical Information
  • 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.
  • A disorder characterized by a decrease in production of parathyroid hormone by the parathyroid glands.
  • An endocrine disorder characterized by decreased production of parathyroid hormone by the parathyroid glands. It is usually caused by damage of the parathyroid glands during head and neck surgery. Signs and symptoms include muscle cramps, abdominal pain, dry skin, brittle nails, cataracts, tetany, and convulsions.
  • Condition produced by greatly reduced function of the parathyroids possibly due to autoimmune disease or genetic factors, or by the removal of those bodies; lack of parathyroid hormone leads to a fall in plasma calcium level, which may result in increase neuromuscular excitability and ultimately tetany followed by a rise in plasma phosphate level.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to E20:
  • Code First: G73.7
    , H28
    ICD-10-CM Diagnosis Code G73.7

    Myopathy in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • hyperparathyroidism (E21.0, E21.3)
    • hypoparathyroidism (E20.-)
    • glycogen storage disease (E74.0)
    • lipid storage disorders (E75.-)
    Type 1 Excludes
    • myopathy in:
    • rheumatoid arthritis (M05.32)
    • sarcoidosis (D86.87)
    • scleroderma (M34.82)
    • sicca syndrome [Sjögren] (M35.03)
    • systemic lupus erythematosus (M32.19)
    ICD-10-CM Diagnosis Code H28

    Cataract in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • hypoparathyroidism (E20.-)
    • myotonia (G71.1-)
    • myxedema (E03.-)
    • protein-calorie malnutrition (E40-E46)
    Type 1 Excludes
ICD-10-CM Codes Adjacent To E20
E13.9 Other specified diabetes mellitus without complications
E15 Nondiabetic hypoglycemic coma
E16 Other disorders of pancreatic internal secretion
E16.0 Drug-induced hypoglycemia without coma
E16.1 Other hypoglycemia
E16.2 Hypoglycemia, unspecified
E16.3 Increased secretion of glucagon
E16.4 Increased secretion of gastrin
E16.8 Other specified disorders of pancreatic internal secretion
E16.9 Disorder of pancreatic internal secretion, unspecified
E20 Hypoparathyroidism
E20.0 Idiopathic hypoparathyroidism
E20.1 Pseudohypoparathyroidism
E20.8 Other hypoparathyroidism
E20.9 Hypoparathyroidism, unspecified
E21 Hyperparathyroidism and other disorders of parathyroid gland
E21.0 Primary hyperparathyroidism
E21.1 Secondary hyperparathyroidism, not elsewhere classified
E21.2 Other hyperparathyroidism
E21.3 Hyperparathyroidism, unspecified
E21.4 Other specified disorders of parathyroid gland

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.