5A51

ICD-11 MMS 2026-01

Hyperparathyroidism

Description

Hyperparathyroidism refers to overproduction of parathormone and is most frequently due to a tumour in one of the parathyroid glands. It may also occur in response to low calcium levels, as encountered in various situations such as vitamin D deficiency or chronic kidney disease. Hyperparathyroidism results in weakening of the bones through loss of calcium.

Excludes

  • 5B57.0 – infantile and juvenile osteomalacia
  • FB83.2 – Adult osteomalacia

Exclusions from above levels

  • 5B57 – Hypovitaminosis D
  • 5C54.1 – Hyperphosphataemic familial tumoural calcinosis
  • 5C63.20 – Hypocalcaemic vitamin D dependent rickets
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  • 5C63.21 – Hypocalcaemic vitamin D resistant rickets
  • 18 – Pregnancy, childbirth or the puerperium
  • http://id.who.int/icd/entity/1004987305 – Transitory endocrine or metabolic disorders specific to fetus or newborn

Child codes

  • 5A51.0 – Primary hyperparathyroidism
  • 5A51.1 – Secondary hyperparathyroidism
  • 5A51.2 – Familial hypocalciuric hypercalcaemia
  • 5A51.Y – Other specified hyperparathyroidism
  • 5A51.Z – Hyperparathyroidism, unspecified

Sibling codes

  • 5A50 – Hypoparathyroidism
  • 5A5Y – Other specified disorders of the parathyroids or parathyroid hormone system
  • 5A5Z – Disorders of the parathyroids or parathyroid hormone system, unspecified

Foundation entity

Hyperparathyroidism – http://id.who.int/icd/entity/9633776

Part of: 05: Endocrine, nutritional or metabolic diseases