Chapter XIII

Diseases of the musculoskeletal system and connective tissue
(M00-M99)

Soft tissue disorders
(M60-M79)


Excludes:	dermatopolymyositis ( M33.- ) muscular dystrophies and myopathies ( G71-G72 ) myopathy in: · amyloidosis ( E85.- ) · polyarteritis nodosa ( M30.0 ) · rheumatoid arthritis ( M05.3 ) · scleroderma ( M34.- ) · Sjögren's syndrome ( M35.0 ) · systemic lupus erythematosus ( M32.- )


M60	Myositis
	[See site code at the beginning of this chapter ]
M60.0	Infective myositis
	Tropical pyomyositis
	Use additional code (B95-B97), if desired, to identify infectious agent.
M60.1	Interstitial myositis
M60.2	Foreign body granuloma of soft tissue, not elsewhere classified
	Excludes:	foreign body granuloma of skin and subcutaneous tissue ( L92.3 )
M60.8	Other myositis
M60.9	Myositis, unspecified


M61	Calcification and ossification of muscle
	[See site code at the beginning of this chapter ]
M61.0	Myositis ossificans traumatica
M61.1	Myositis ossificans progressiva
	Fibrodysplasia ossificans progressiva
M61.2	Paralytic calcification and ossification of muscle
	Myositis ossificans associated with quadriplegia or paraplegia
M61.3	Calcification and ossification of muscles associated with burns
	Myositis ossificans associated with burns
M61.4	Other calcification of muscle
	Excludes:	calcific tendinitis ( M65.2 ) · of shoulder ( M75.3 )
M61.5	Other ossification of muscle
M61.9	Calcification and ossification of muscle, unspecified


M62	Other disorders of muscle
	[See site code at the beginning of this chapter ]
	Excludes:	cramp and spasm ( R25.2 ) myalgia ( M79.1 ) myopathy: · alcoholic ( G72.1 ) · drug-induced ( G72.0 ) stiff-man syndrome ( G25.8 )
M62.0	Diastasis of muscle
M62.1	Other rupture of muscle (nontraumatic)
	Excludes:	rupture of tendon ( M66.- ) traumatic rupture of muscle - see injury of muscle by body region
M62.2	Ischaemic infarction of muscle
	Compartment syndrome, non-traumatic
	Excludes:	compartment syndrome, traumatic ( T79.6 ) traumatic ischaemia of muscle ( T79.6 ) Volkmann's ischaemic contracture ( T79.6 )
M62.3	Immobility syndrome (paraplegic)
M62.4	Contracture of muscle
	Excludes:	contracture of joint ( M24.5 )
M62.5	Muscle wasting and atrophy, not elsewhere classified
	Disuse atrophy NEC
M62.6	Muscle strain
	Excludes:	current injury - see injury of muscle by body region
M62.8	Other specified disorders of muscle
#	Muscle (sheath) hernia Rhabdomyolysis
M62.9	Disorder of muscle, unspecified


M63*	Disorders of muscle in diseases classified elsewhere
	Excludes:	myopathy in: · endocrine diseases ( G73.5* ) · metabolic diseases ( G73.6* )
M63.0*	Myositis in bacterial diseases classified elsewhere
	Myositis in: · leprosy [Hansen's disease] ( A30.-+ ) · syphilis ( A51.4+ , A52.7+ )
M63.1*	Myositis in protozoal and parasitic infections classified elsewhere
	Myositis in: · cysticercosis ( B69.8+ ) · schistosomiasis [bilharziasis] ( B65.-+ ) · toxoplasmosis ( B58.8+ ) · trichinellosis ( B75+ )
M63.2*	Myositis in other infectious diseases classified elsewhere
	Myositis in mycosis ( B35-B49+ )
M63.3*	Myositis in sarcoidosis ( D86.8+ )
M63.8*	Other disorders of muscle in diseases classified elsewhere