Chapter 13: Diseases of the musculoskeletal system and connective tissue

Code range M00-M99 - 79 categories

Category	Description	Billable codes
`M00`	Pyogenic arthritis	97
`M01`	Direct infect of joint in infec/parastc dis classd elswhr	24
`M02`	Postinfective and reactive arthropathies	121
`M04`	Autoinflammatory syndromes	5
`M05`	Rheumatoid arthritis with rheumatoid factor	211
`M06`	Other rheumatoid arthritis	101
`M07`	Enteropathic arthropathies	24
`M08`	Juvenile arthritis	125
`M10`	Gout	121
`M11`	Other crystal arthropathies	97
`M12`	Other and unspecified arthropathy	169
`M13`	Other arthritis	47
`M14`	Arthropathies in other diseases classified elsewhere	48
`M15`	Polyosteoarthritis	7
`M16`	Osteoarthritis of hip	15
`M17`	Osteoarthritis of knee	11
`M18`	Osteoarthritis of first carpometacarpal joint	13
`M19`	Other and unspecified osteoarthritis	52
`M1A`	Chronic gout	242
`M20`	Acquired deformities of fingers and toes	33
`M21`	Other acquired deformities of limbs	124
`M22`	Disorder of patella	21
`M23`	Internal derangement of knee	111
`M24`	Other specific joint derangements	205
`M25`	Other joint disorder, not elsewhere classified	225
`M26`	Dentofacial anomalies [including malocclusion]	78
`M27`	Other diseases of jaws	16
`M30`	Polyarteritis nodosa and related conditions	5
`M31`	Other necrotizing vasculopathies	13
`M32`	Systemic lupus erythematosus (SLE)	10
`M33`	Dermatopolymyositis	19
`M34`	Systemic sclerosis [scleroderma]	8
`M35`	Other systemic involvement of connective tissue	23
`M36`	Systemic disorders of conn tiss in diseases classd elswhr	6
`M40`	Kyphosis and lordosis	31
`M41`	Scoliosis	55
`M42`	Spinal osteochondrosis	21
`M43`	Other deforming dorsopathies	50
`M45`	Ankylosing spondylitis	20
`M46`	Other inflammatory spondylopathies	70
`M47`	Spondylosis	45
`M48`	Other spondylopathies	119
`M49`	Spondylopathies in diseases classified elsewhere	10
`M50`	Cervical disc disorders	42
`M51`	Thoracic, thoracolum, and lumbosacral intvrt disc disorders	36
`M53`	Other and unspecified dorsopathies, not elsewhere classified	22
`M54`	Dorsalgia	33
`M60`	Myositis	111
`M61`	Calcification and ossification of muscle	154
`M62`	Other disorders of muscle	131
`M63`	Disorders of muscle in diseases classified elsewhere	24
`M65`	Synovitis and tenosynovitis	133
`M66`	Spontaneous rupture of synovium and tendon	103
`M67`	Other disorders of synovium and tendon	143
`M70`	Soft tissue disorders related to use, overuse and pressure	75
`M71`	Other bursopathies	138
`M72`	Fibroblastic disorders	9
`M75`	Shoulder lesions	30
`M76`	Enthesopathies, lower limb, excluding foot	34
`M77`	Other enthesopathies	20
`M79`	Oth and unsp soft tissue disorders, not elsewhere classified	52
`M80`	Osteoporosis with current pathological fracture	324
`M81`	Osteoporosis without current pathological fracture	3
`M83`	Adult osteomalacia	8
`M84`	Disorder of continuity of bone	928
`M85`	Other disorders of bone density and structure	169
`M86`	Osteomyelitis	195
`M87`	Osteonecrosis	217
`M88`	Osteitis deformans [Paget's disease of bone]	26
`M89`	Other disorders of bone	222
`M90`	Osteopathies in diseases classified elsewhere	72
`M91`	Juvenile osteochondrosis of hip and pelvis	19
`M92`	Other juvenile osteochondrosis	48
`M93`	Other osteochondropathies	105
`M94`	Other disorders of cartilage	40
`M95`	Oth acquired deformities of ms sys and connective tissue	10
`M96`	Intraop and postproc comp and disorders of ms sys, NEC	36
`M97`	Periprosthetic fracture around internal prosthetic joint	36
`M99`	Biomechanical lesions, not elsewhere classified	91