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ICD-10 diagnosis code

E21 Hyperparathyroidism and other disorders of parathyroid gland

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E21 is the ICD-10 code for Hyperparathyroidism and other disorders of parathyroid gland. It is a three-character category divided into 6 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block E20–E35 (Disorders of other endocrine glands) in Chapter IV, Endocrine, nutritional and metabolic diseases.

Code type
Category (3 characters)
Chapter
IV · E00–E90
Classification
WHO ICD-10, 2019 version

What E21 excludes

Conditions that look similar but belong under another code.

  • osteomalacia:

Subcodes of E21

E21 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

E21Hyperparatyreoidism (överfunktion av bisköldkörtel) och andra sjukdomar i bisköldkörtlarna

DenmarkICD-10-DK

DE21Hyperparathyroidisme og andre sygdomme i biskjoldbruskkirtel

FinlandICD-10-FI

E21Lisäkilpirauhasten liikatoiminta ja muut lisäkilpirauhashäiriöt

GermanyICD-10-GM

E21Hyperparathyreoidismus und sonstige Krankheiten der Nebenschilddrüse

FranceICD-10-FR

E21Hyperparathyroïdie et autres maladies de la glande parathyroïde

NetherlandsICD-10-NL

E21hyperparathyroïdie en overige aandoeningen van bijschildklier

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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