ICD-10 Chapter XIII: Diseases of the musculoskeletal system and connective tissue

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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

(M00-M25) Arthropathies

(M00-M03) Infectious arthropathies

(M00) Pyogenic arthritis
(M01) Direct infections of joint in infectious and parasitic diseases classified elsewhere
(M02) Reactive arthropathies
- (M02.3) Reiter's disease
(M03) Postinfective and reactive arthropathies in diseases classified elsewhere

(M05-M14) Inflammatory polyarthropathies

(M05) Seropositive rheumatoid arthritis
- (M05.0) Felty's syndrome
- (M05.1) Rheumatoid lung disease
- (M05.2) Rheumatoid vasculitis
- (M05.3) Rheumatoid arthritis with involvement of other organs and systems
- (M05.8) Other seropositive rheumatoid arthritis
- (M05.9) Seropositive rheumatoid arthritis, unspecified

(M06) Other rheumatoid arthritis
(M07) Psoriatic and enteropathic arthropathies

(M08) Juvenile arthritis
- (M08.0) Juvenile rheumatoid arthritis
- (M08.1) Juvenile ankylosing spondylitis
- (M08.2) Juvenile arthritis with systemic onset
- (M08.3) Juvenile polyarthritis (seronegative)
- (M08.4) Pauciarticular juvenile arthritis
- (M08.8) Other juvenile arthritis
- (M08.9) Juvenile arthritis, unspecified

(M09) Juvenile arthritis in diseases classified elsewhere

(M10) Gout

(M11) Other crystal arthropathies
- (M11.0) Hydroxyapatite deposition disease
- (M11.1) Familial chondrocalcinosis
- (M11.2) Other chondrocalcinosis
- (M11.8) Other specified crystal arthropathies
- (M11.9) Crystal arthropathy, unspecified

(M12) Other specific arthropathies
(M13) Other arthritis
(M14) Arthropathies in other diseases classified elsewhere

(M15-M19) Arthrosis

(M15) Polyarthrosis
- (M15.0) Primary generalized (osteo)arthrosis
- (M15.1) Heberden's nodes (with arthropathy)
- (M15.2) Bouchard's nodes (with arthropathy)
- (M15.3) Secondary multiple arthrosis
- (M15.4) Erosive (osteo)arthrosis
- (M15.8) Other polyarthrosis
- (M15.9) Polyarthrosis, unspecified

(M16) Coxarthrosis (arthrosis of hip)
(M17) Gonarthrosis (arthrosis of knee)
(M18) Arthrosis of first carpometacarpal joint
(M19) Other arthrosis

(M20-M25) Other joint disorders

(M20) Acquired deformities of fingers and toes
- (M20.0) Deformity of finger(s)
  - Boutonnière and swan-neck deformities
- (M20.1) Hallux valgus (acquired)
  - Bunion
- (M20.2) Hallux rigidus
- (M20.3) Other deformity of hallux (acquired)
  - Hallux varus
- (M20.4) Other hammer toe(s) (acquired)
- (M20.5) Other deformities of toe(s) (acquired)
- (M20.6) Acquired deformity of toe(s), unspecified

(M21) Other acquired deformities of limbs
- (M21.0) Valgus deformity, not elsewhere classified
- (M21.1) Varus deformity, not elsewhere classified
- (M21.2) Flexion deformity
- (M21.3) Wrist or foot drop (acquired)
- (M21.4) Flat foot (pes planus) (acquired)
- (M21.5) Acquired clawhand, clubhand, clawfoot and clubfoot
- (M21.6) Other acquired deformities of ankle and foot
- (M21.7) Unequal limb length (acquired)
- (M21.8) Other specified acquired deformities of limbs
- (M21.9) Acquired deformity of limb, unspecified

(M22) Disorders of patella
- (M22.0) Recurrent dislocation of patella
- (M22.1) Recurrent subluxation of patella
- (M22.2) Patellofemoral disorders
- (M22.3) Other derangements of patella
- (M22.4) Chondromalacia patellae
- (M22.8) Other disorders of patella
- (M22.9) Disorder of patella, unspecified

(M23) Internal derangement of knee
- (M23.0) Cystic meniscus
- (M23.1) Discoid meniscus (congenital)
- (M23.2) Derangement of meniscus due to old tear or injury
- (M23.3) Other meniscus derangements
- (M23.4) Loose body in knee
- (M23.5) Chronic instability of knee
- (M23.6) Other spontaneous disruption of ligament(s) of knee
- (M23.8) Other internal derangements of knee
- (M23.9) Internal derangement of knee, unspecified

(M24) Other specific joint derangements
- (M24.0) Loose body in joint
- (M24.1) Other articular cartilage disorders
- (M24.2) Disorder of ligament
- (M24.3) Pathological dislocation and subluxation of joint, not elsewhere classified
- (M24.4) Recurrent dislocation and subluxation of joint
- (M24.5) Contracture of joint
- (M24.6) Ankylosis of joint
- (M24.7) Protrusio acetabuli
- (M24.8) Other specific joint derangements, not elsewhere classified
- (M24.9) Joint derangement, unspecified

(M25) Other joint disorders, not elsewhere classified
- (M25.0) Haemarthrosis
- (M25.1) Fistula of joint
- (M25.2) Flail joint
- (M25.3) Other instability of joint
- (M25.4) Effusion of joint
- (M25.5) Pain in joint
- (M25.6) Stiffness of joint, not elsewhere classified
- (M25.7) Osteophyte
- (M25.8) Other specified joint disorders
- (M25.9) Joint disorder, unspecified

(M30-M36) Systemic connective tissue disorders

(M30) Polyarteritis nodosa and related conditions
- (M30.0) Polyarteritis nodosa
- (M30.1) Polyarteritis with lung involvement (Churg-Strauss syndrome)
- (M30.2) Juvenile polyarteritis
- (M30.3) Mucocutaneous lymph node syndrome (Kawasaki)
- (M30.8) Other conditions related to polyarteritis nodosa

(M31) Other necrotizing vasculopathies
- (M31.0) Hypersensitivity angiitis
  - Goodpasture's syndrome
- (M31.1) Thrombotic microangiopathy
- (M31.2) Lethal midline granuloma
- (M31.3) Wegener's granulomatosis
- (M31.4) Aortic arch syndrome (Takayasu)
- (M31.5) Giant cell arteritis with polymyalgia rheumatica
- (M31.6) Other giant cell arteritis
- (M31.7) Microscopic polyangiitis
- (M31.8) Other specified necrotizing vasculopathies
- (M31.9) Necrotizing vasculopathy, unspecified

(M32) Systemic lupus erythematosus
- (M32.0) Drug-induced systemic lupus erythematosus
- (M32.1) Systemic lupus erythematosus with organ or system involvement
  - Libman-Sacks disease
  - Lupus pericarditis
- (M32.8) Other forms of systemic lupus erythematosus
- (M32.9) Systemic lupus erythematosus, unspecified

(M33) Dermatopolymyositis
- (M33.0) Juvenile dermatomyositis
- (M33.1) Other dermatomyositis
- (M33.2) Polymyositis

(M34) Systemic sclerosis
- (M34.0) Progressive systemic sclerosis
- (M34.1) CR(E)ST syndrome
- (M34.2) Systemic sclerosis induced by drugs and chemicals
- (M34.8) Other forms of systemic sclerosis
- (M34.9) Systemic sclerosis, unspecified

(M35) Other systemic involvement of connective tissue
- (M35.0) Sjögren's syndrome (Sicca syndrome)
- (M35.1) Other overlap syndromes
- (M35.2) Behçet's disease
- (M35.3) Polymyalgia rheumatica
- (M35.4) Diffuse (eosinophilic) fasciitis
- (M35.5) Multifocal fibrosclerosis
- (M35.6) Relapsing panniculitis (Weber-Christian)
- (M35.7) Hypermobility syndrome
- (M35.8) Other specified systemic involvement of connective tissue
- (M35.9) Systemic involvement of connective tissue, unspecified

(M36) Systemic disorders of connective tissue in diseases classified elsewhere

(M40-M54) Dorsopathies

(M40-M43) Deforming dorsopathies

(M40) Kyphosis and lordosis
- (M40.0) Postural kyphosis
(M41) Scoliosis
(M42) Spinal osteochondrosis
- (M42.0) Juvenile osteochondrosis of spine
  - Scheuermann's disease
- (M42.1) Adult osteochondrosis of spine
- (M42.9) Spinal osteochondrosis, unspecified
(M43) Other deforming dorsopathies
- (M43.0) Spondylolysis
- (M43.1) Spondylolisthesis
- (M43.2) Other fusion of spine
- (M43.6) Torticollis

(M45-M49) Spondylopathies

(M45) Ankylosing spondylitis
(M46) Other inflammatory spondylopathies
(M47) Spondylosis

(M48) Other spondylopathies
- (M48.0) Spinal stenosis
- (M48.1) Ankylosing hyperostosis (Forestier)
- (M48.2) Kissing spine
- (M48.3) Traumatic spondylopathy
- (M48.4) Fatigue fracture of vertebra
  - Stress fracture of vertebra
- (M48.5) Collapsed vertebra, not elsewhere classified
- (M48.8) Other specified spondylopathies
- (M48.9) Spondylopathy, unspecified

(M49) Spondylopathies in diseases classified elsewhere
- (M49.0) Tuberculosis of spine
  - Pott's curvature
- (M49.1) Brucella spondylitis
- (M49.2) Enterobacterial spondylitis
- (M49.3) Spondylopathy in other infectious and parasitic diseases classified elsewhere
- (M49.4) Neuropathic spondylopathy
- (M49.5) Collapsed vertebra in diseases classified elsewhere
- (M49.8) Spondylopathy in other diseases classified elsewhere

(M50-M54) Other dorsopathies

(M50) Cervical disc disorders

(M51) Other intervertebral disc disorders
- (M51.0) Lumbar and other intervertebral disc disorders with myelopathy
- (M51.1) Lumbar and other intervertebral disc disorders with radiculopathy
- (M51.2) Other specified intervertebral disc displacement
- (M51.3) Other specified intervertebral disc degeneration
- (M51.4) Schmorl's nodes
- (M51.8) Other specified intervertebral disc disorders
- (M51.9) Intervertebral disc disorder, unspecified

(M53) Other dorsopathies, not elsewhere classified
- (M53.0) Cervicocranial syndrome
- (M53.1) Cervicobrachial syndrome
- (M53.2) Spinal instabilities
- (M53.3) Sacrococcygeal disorders, not elsewhere classified
  - Coccygodynia
- (M53.8) Other specified dorsopathies
- (M53.9) Dorsopathy, unspecified

(M54) Dorsalgia
- (M54.0) Panniculitis affecting regions of neck and back
- (M54.1) Radiculopathy
- (M54.2) Cervicalgia
- (M54.3) Sciatica
- (M54.4) Lumbago with sciatica
- (M54.5) Low back pain
- (M54.6) Pain in thoracic spine
- (M54.8) Other dorsalgia
- (M54.9) Dorsalgia, unspecified

(M60-M79) Soft tissue disorders

(M60-M63) Disorders of muscles

(M60) Myositis
- Tropical pyomyositis
(M61) Calcification and ossification of muscle
- (M61.0) Myositis ossificans traumatica
- (M61.1) Myositis ossificans progressiva
  - Fibrodysplasia ossificans progressiva
- (M61.2) Paralytic calcification and ossification of muscle
- (M61.3) Calcification and ossification of muscles associated with burns
- (M61.4) Other calcification of muscle
- (M61.5) Other ossification of muscle
- (M61.9) Calcification and ossification of muscle, unspecified

(M62) Other disorders of muscle
- (M62.0) Diastasis of muscle
- (M62.1) Other rupture of muscle (nontraumatic)
- (M62.2) Ischaemic infarction of muscle
- (M62.3) Immobility syndrome (paraplegic)
- (M62.4) Contracture of muscle
- (M62.5) Muscle wasting and atrophy, not elsewhere classified
- (M62.6) Muscle strain
- (M62.8) Other specified disorders of muscle
- (M62.9) Disorder of muscle, unspecified

(M63) Disorders of muscle in diseases classified elsewhere

(M65-M68) Disorders of synovium and tendon

(M65) Synovitis and tenosynovitis
- (M65.0) Abscess of tendon sheath
- (M65.1) Other infective (teno)synovitis
- (M65.2) Calcific tendinitis
- (M65.3) Trigger finger
- (M65.4) Radial styloid tenosynovitis (de Quervain)
- (M65.8) Other synovitis and tenosynovitis
- (M65.9) Synovitis and tenosynovitis, unspecified

(M66) Spontaneous rupture of synovium and tendon
- (M66.0) Rupture of popliteal cyst
- (M66.1) Rupture of synovium
- (M66.2) Spontaneous rupture of extensor tendons
- (M66.3) Spontaneous rupture of flexor tendons
- (M66.4) Spontaneous rupture of other tendons
- (M66.5) Spontaneous rupture of unspecified tendon