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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  • M85.869—

    Other specified disorders of bone density and structure, unspecified lower leg

  • M85.871—

    Other specified disorders of bone density and structure, right ankle and foot

  • M85.872—

    Other specified disorders of bone density and structure, left ankle and foot

  • M85.879—

    Other specified disorders of bone density and structure, unspecified ankle and foot

  • M85.88—

    Other specified disorders of bone density and structure, other site

  • M85.89—

    Other specified disorders of bone density and structure, multiple sites

  • M85.9—

    Disorder of bone density and structure, unspecified

  • M86.00—

    Acute hematogenous osteomyelitis, unspecified site

  • M86.011—

    Acute hematogenous osteomyelitis, right shoulder

  • M86.012—

    Acute hematogenous osteomyelitis, left shoulder

  • M86.019—

    Acute hematogenous osteomyelitis, unspecified shoulder

  • M86.021—

    Acute hematogenous osteomyelitis, right humerus

  • M86.022—

    Acute hematogenous osteomyelitis, left humerus

  • M86.029—

    Acute hematogenous osteomyelitis, unspecified humerus

  • M86.031—

    Acute hematogenous osteomyelitis, right radius and ulna

  • M86.032—

    Acute hematogenous osteomyelitis, left radius and ulna

  • M86.039—

    Acute hematogenous osteomyelitis, unspecified radius and ulna

  • M86.041—

    Acute hematogenous osteomyelitis, right hand

  • M86.042—

    Acute hematogenous osteomyelitis, left hand

  • M86.049—

    Acute hematogenous osteomyelitis, unspecified hand

  • M86.051—

    Acute hematogenous osteomyelitis, right femur

  • M86.052—

    Acute hematogenous osteomyelitis, left femur

  • M86.059—

    Acute hematogenous osteomyelitis, unspecified femur

  • M86.061—

    Acute hematogenous osteomyelitis, right tibia and fibula

  • M86.062—

    Acute hematogenous osteomyelitis, left tibia and fibula

  • M86.069—

    Acute hematogenous osteomyelitis, unspecified tibia and fibula

  • M86.071—

    Acute hematogenous osteomyelitis, right ankle and foot

  • M86.072—

    Acute hematogenous osteomyelitis, left ankle and foot

  • M86.079—

    Acute hematogenous osteomyelitis, unspecified ankle and foot

  • M86.08—

    Acute hematogenous osteomyelitis, other sites

  • M86.09—

    Acute hematogenous osteomyelitis, multiple sites

  • M86.10—

    Other acute osteomyelitis, unspecified site

  • M86.111—

    Other acute osteomyelitis, right shoulder

  • M86.112—

    Other acute osteomyelitis, left shoulder

  • M86.119—

    Other acute osteomyelitis, unspecified shoulder

  • M86.121—

    Other acute osteomyelitis, right humerus

  • M86.122—

    Other acute osteomyelitis, left humerus

  • M86.129—

    Other acute osteomyelitis, unspecified humerus

  • M86.131—

    Other acute osteomyelitis, right radius and ulna

  • M86.132—

    Other acute osteomyelitis, left radius and ulna

  • M86.139—

    Other acute osteomyelitis, unspecified radius and ulna

  • M86.141—

    Other acute osteomyelitis, right hand

  • M86.142—

    Other acute osteomyelitis, left hand

  • M86.149—

    Other acute osteomyelitis, unspecified hand

  • M86.151—

    Other acute osteomyelitis, right femur

  • M86.152—

    Other acute osteomyelitis, left femur

  • M86.159—

    Other acute osteomyelitis, unspecified femur

  • M86.161—

    Other acute osteomyelitis, right tibia and fibula

  • M86.162—

    Other acute osteomyelitis, left tibia and fibula

  • M86.169—

    Other acute osteomyelitis, unspecified tibia and fibula

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