All ICD10 Codes
Chapter 13

M00–M99: Diseases of the Musculoskeletal System and Connective Tissue

Diseases of the Musculoskeletal System and Connective Tissue diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)
All CodesBillable Only
Internal Codes
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  • M86.59—

    Other chronic hematogenous osteomyelitis, multiple sites

  • M86.60—

    Other chronic osteomyelitis, unspecified site

  • M86.611—

    Other chronic osteomyelitis, right shoulder

  • M86.612—

    Other chronic osteomyelitis, left shoulder

  • M86.619—

    Other chronic osteomyelitis, unspecified shoulder

  • M86.621—

    Other chronic osteomyelitis, right humerus

  • M86.622—

    Other chronic osteomyelitis, left humerus

  • M86.629—

    Other chronic osteomyelitis, unspecified humerus

  • M86.631—

    Other chronic osteomyelitis, right radius and ulna

  • M86.632—

    Other chronic osteomyelitis, left radius and ulna

  • M86.639—

    Other chronic osteomyelitis, unspecified radius and ulna

  • M86.641—

    Other chronic osteomyelitis, right hand

  • M86.642—

    Other chronic osteomyelitis, left hand

  • M86.649—

    Other chronic osteomyelitis, unspecified hand

  • M86.651—

    Other chronic osteomyelitis, right thigh

  • M86.652—

    Other chronic osteomyelitis, left thigh

  • M86.659—

    Other chronic osteomyelitis, unspecified thigh

  • M86.661—

    Other chronic osteomyelitis, right tibia and fibula

  • M86.662—

    Other chronic osteomyelitis, left tibia and fibula

  • M86.669—

    Other chronic osteomyelitis, unspecified tibia and fibula

  • M86.671—

    Other chronic osteomyelitis, right ankle and foot

  • M86.672—

    Other chronic osteomyelitis, left ankle and foot

  • M86.679—

    Other chronic osteomyelitis, unspecified ankle and foot

  • M86.68—

    Other chronic osteomyelitis, other site

  • M86.69—

    Other chronic osteomyelitis, multiple sites

  • M86.8X0—

    Other osteomyelitis, multiple sites

  • M86.8X1—

    Other osteomyelitis, shoulder

  • M86.8X2—

    Other osteomyelitis, upper arm

  • M86.8X3—

    Other osteomyelitis, forearm

  • M86.8X4—

    Other osteomyelitis, hand

  • M86.8X5—

    Other osteomyelitis, thigh

  • M86.8X6—

    Other osteomyelitis, lower leg

  • M86.8X7—

    Other osteomyelitis, ankle and foot

  • M86.8X8—

    Other osteomyelitis, other site

  • M86.8X9—

    Other osteomyelitis, unspecified sites

  • M86.9—

    Osteomyelitis, unspecified

  • M87.00—

    Idiopathic aseptic necrosis of unspecified bone

  • M87.011—

    Idiopathic aseptic necrosis of right shoulder

  • M87.012—

    Idiopathic aseptic necrosis of left shoulder

  • M87.019—

    Idiopathic aseptic necrosis of unspecified shoulder

  • M87.021—

    Idiopathic aseptic necrosis of right humerus

  • M87.022—

    Idiopathic aseptic necrosis of left humerus

  • M87.029—

    Idiopathic aseptic necrosis of unspecified humerus

  • M87.031—

    Idiopathic aseptic necrosis of right radius

  • M87.032—

    Idiopathic aseptic necrosis of left radius

  • M87.033—

    Idiopathic aseptic necrosis of unspecified radius

  • M87.034—

    Idiopathic aseptic necrosis of right ulna

  • M87.035—

    Idiopathic aseptic necrosis of left ulna

  • M87.036—

    Idiopathic aseptic necrosis of unspecified ulna

  • M87.037—

    Idiopathic aseptic necrosis of right carpus

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