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

Note: Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Excludes2: arthropathic psoriasis (L40.5-), certain conditions originating in the perinatal period (P04-P96), certain infectious and parasitic diseases (A00-B99), compartment syndrome (traumatic) (T79.A-), complications of pregnancy, childbirth and the puerperium (O00-O9A), congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99), endocrine, nutritional and metabolic diseases (E00-E88), injury, poisoning and certain other consequences of external causes (S00-T88), neoplasms (C00-D49), symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

• Infectious arthropathies (M00-M02)

  • Pyogenic arthritis (M00)
  • Direct infections of joint in infectious and parasitic diseases classified elsewhere (M01)
  • Postinfective and reactive arthropathies (M02)

• Autoinflammatory syndromes (M04)

  • Autoinflammatory syndromes (M04)

• Inflammatory polyarthropathies (M05-M14)

  • Rheumatoid arthritis with rheumatoid factor (M05)
  • Other rheumatoid arthritis (M06)
  • Enteropathic arthropathies (M07)
  • Juvenile arthritis (M08)
  • Gout (M10)
  • Other crystal arthropathies (M11)
  • Other and unspecified arthropathy (M12)
  • Other arthritis (M13)
  • Arthropathies in other diseases classified elsewhere (M14)
  • Chronic gout (M1A)

• Osteoarthritis (M15-M19)

  • Polyosteoarthritis (M15)
  • Osteoarthritis of hip (M16)
  • Osteoarthritis of knee (M17)
  • Osteoarthritis of first carpometacarpal joint (M18)
  • Other and unspecified osteoarthritis (M19)

• Other joint disorders (M20-M25)

  • Acquired deformities of fingers and toes (M20)
  • Other acquired deformities of limbs (M21)
  • Disorder of patella (M22)
  • Internal derangement of knee (M23)
  • Other specific joint derangements (M24)
  • Other joint disorder, not elsewhere classified (M25)

• Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)

  • Dentofacial anomalies [including malocclusion] (M26)
  • Other diseases of jaws (M27)

• Systemic connective tissue disorders (M30-M36)

  • Polyarteritis nodosa and related conditions (M30)
  • Other necrotizing vasculopathies (M31)
  • Systemic lupus erythematosus (SLE) (M32)
  • Dermatopolymyositis (M33)
  • Systemic sclerosis [scleroderma] (M34)
  • Other systemic involvement of connective tissue (M35)
  • Systemic disorders of connective tissue in diseases classified elsewhere (M36)

• Deforming dorsopathies (M40-M43)

  • Kyphosis and lordosis (M40)
  • Scoliosis (M41)
  • Spinal osteochondrosis (M42)
  • Other deforming dorsopathies (M43)

• Spondylopathies (M45-M49)

  • Ankylosing spondylitis (M45)
  • Other inflammatory spondylopathies (M46)
  • Spondylosis (M47)
  • Other spondylopathies (M48)
  • Spondylopathies in diseases classified elsewhere (M49)

• Other dorsopathies (M50-M54)

  • Cervical disc disorders (M50)
  • Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders (M51)
  • Other and unspecified dorsopathies, not elsewhere classified (M53)
  • Dorsalgia (M54)

• Disorders of muscles (M60-M63)

  • Myositis (M60)
  • Calcification and ossification of muscle (M61)
  • Other disorders of muscle (M62)
  • Disorders of muscle in diseases classified elsewhere (M63)

• Disorders of synovium and tendon (M65-M67)

  • Synovitis and tenosynovitis (M65)
  • Spontaneous rupture of synovium and tendon (M66)
  • Other disorders of synovium and tendon (M67)

• Other soft tissue disorders (M70-M79)

  • Soft tissue disorders related to use, overuse and pressure (M70)
  • Other bursopathies (M71)
  • Fibroblastic disorders (M72)
  • Shoulder lesions (M75)
  • Enthesopathies, lower limb, excluding foot (M76)
  • Other enthesopathies (M77)
  • Other and unspecified soft tissue disorders, not elsewhere classified (M79)

• Disorders of bone density and structure (M80-M85)

  • Osteoporosis with current pathological fracture (M80)
  • Osteoporosis without current pathological fracture (M81)
  • Adult osteomalacia (M83)
  • Disorder of continuity of bone (M84)
  • Other disorders of bone density and structure (M85)

• Other osteopathies (M86-M90)

  • Osteomyelitis (M86)
  • Osteonecrosis (M87)
  • Osteitis deformans [Paget's disease of bone] (M88)
  • Other disorders of bone (M89)
  • Osteopathies in diseases classified elsewhere (M90)

• Chondropathies (M91-M94)

  • Juvenile osteochondrosis of hip and pelvis (M91)
  • Other juvenile osteochondrosis (M92)
  • Other osteochondropathies (M93)
  • Other disorders of cartilage (M94)

• Other disorders of the musculoskeletal system and connective tissue (M95)

  • Other acquired deformities of musculoskeletal system and connective tissue (M95)

• Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified (M96)

  • Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified (M96)

• Periprosthetic fracture around internal prosthetic joint (M97)

  • Periprosthetic fracture around internal prosthetic joint (M97)

• Biomechanical lesions, not elsewhere classified (M99)

  • Biomechanical lesions, not elsewhere classified (M99)