5B5K.1 Calcium deficiency

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

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, chronic kidney disease being the most common cause. Other causes are: vitamin D deficiency, disorders associated with acquired or genetichypoparathyroidism , 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.

exclusions

• Disorders of calcium metabolism  (5C64.5)

code elsewhere

• Neonatal hypocalcaemia  (KB61.2)
• Neonatal osteopenia  (KB61.3)
• Myopathy due to calcium deficiency  (8D40.2)

sections/codes in this section (5B5K.1-5B5K.1)

• Tetany due to acute calcium deficiency  (5B5K.10)
• Other specified calcium deficiency  (5B5K.1Y)
• Calcium deficiency, unspecified  (5B5K.1Z)

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