| M81.0 | Postmenopausal osteoporosis 
 | 
	| M81.1 | Postoophorectomy osteoporosis 
 | 
	| M81.2 | Osteoporosis of disuse 
 
Excludes:
Sudeck's atrophy ( M89.0 )
 | 
	| M81.3 | Postsurgical malabsorption osteoporosis 
 | 
	| M81.4 | Drug-induced osteoporosis Use additional external cause code (Chapter XX), if desired, to identify drug.
 | 
	| M81.5 | Idiopathic osteoporosis 
 | 
	| M81.6 | Localized osteoporosis [Lequesne] 
 
Excludes:
Sudeck's atrophy ( M89.0 )
 | 
	| M81.8 | Other osteoporosis Senile osteoporosis
 | 
	| M81.9 | Osteoporosis, unspecified 
 |