ICD-11 classes
05 Endocrine, nutritional or metabolic diseases
Nutritional disorders
Undernutrition
5B5K — Mineral deficiencies
5B5K.1 — Calcium deficiency

ICD-11 5B5K.1 — Calcium deficiency

Hypocalcaemia is defined as a total serum calcium concentration of less than 8.4 mg/dl (2.1 mmol/litre) or an ionized calcium concentration of less than 4.48 mg/dl (1.12 mmol/litre). There are numerous causes of hypocalcaemia, being chronic kidney disease the most common cause. Other causes are: vitamin D deficiency, disorders associated with acquired or genetic hypoparathyroridism, including intravenous bisphosphonate therapy, post-thyroidectomy and post-parathyroidectomy, and acute pancreatitis. Hypocalcaemia may be associated with a spectrum of clinical manifestations, ranging from few symptoms if the hypocalcaemia is mild, to life-threatening seizures, refractory heart failure, or laryngospasm if it is severe. In addition to severity, the rate of development of hypocalcaemia and chronicity determine the clinical manifestations.

The diagnosis includes nothing.

Diagnosis with code 5B5K.1 contains 5 clarifying diagnoses:

1. 5B5K.10 — Tetany due to acute calcium deficiency
2. KB61.2 — Neonatal hypocalcaemia
3. KB61.3 — Neonatal osteopenia
4. 5B5K.1Y — Other specified calcium deficiency
5. 5B5K.1Z — Calcium deficiency, unspecified