| E21.0 | Primary hyperparathyroidism Hyperplasia of parathyroid
 Osteitis fibrosa cystica generalisata [von Recklinghausen's disease of bone]
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	| E21.1 | Secondary hyperparathyroidism, not elsewhere classified 
 
Excludes:
secondary hyperparathyroidism of renal origin ( N25.8 ) 
 | 
	| E21.2 | Other hyperparathyroidism 
 
Excludes:
familial hypocalciuric hypercalcaemia ( E83.5 ) 
 | 
	| E21.3 | Hyperparathyroidism, unspecified 
 | 
	| E21.4 | Other specified disorders of parathyroid gland 
 | 
	| E21.5 | Disorder of parathyroid gland, unspecified 
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