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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  • M86.171—

    Other acute osteomyelitis, right ankle and foot

  • M86.172—

    Other acute osteomyelitis, left ankle and foot

  • M86.179—

    Other acute osteomyelitis, unspecified ankle and foot

  • M86.18—

    Other acute osteomyelitis, other site

  • M86.19—

    Other acute osteomyelitis, multiple sites

  • M86.20—

    Subacute osteomyelitis, unspecified site

  • M86.211—

    Subacute osteomyelitis, right shoulder

  • M86.212—

    Subacute osteomyelitis, left shoulder

  • M86.219—

    Subacute osteomyelitis, unspecified shoulder

  • M86.221—

    Subacute osteomyelitis, right humerus

  • M86.222—

    Subacute osteomyelitis, left humerus

  • M86.229—

    Subacute osteomyelitis, unspecified humerus

  • M86.231—

    Subacute osteomyelitis, right radius and ulna

  • M86.232—

    Subacute osteomyelitis, left radius and ulna

  • M86.239—

    Subacute osteomyelitis, unspecified radius and ulna

  • M86.241—

    Subacute osteomyelitis, right hand

  • M86.242—

    Subacute osteomyelitis, left hand

  • M86.249—

    Subacute osteomyelitis, unspecified hand

  • M86.251—

    Subacute osteomyelitis, right femur

  • M86.252—

    Subacute osteomyelitis, left femur

  • M86.259—

    Subacute osteomyelitis, unspecified femur

  • M86.261—

    Subacute osteomyelitis, right tibia and fibula

  • M86.262—

    Subacute osteomyelitis, left tibia and fibula

  • M86.269—

    Subacute osteomyelitis, unspecified tibia and fibula

  • M86.271—

    Subacute osteomyelitis, right ankle and foot

  • M86.272—

    Subacute osteomyelitis, left ankle and foot

  • M86.279—

    Subacute osteomyelitis, unspecified ankle and foot

  • M86.28—

    Subacute osteomyelitis, other site

  • M86.29—

    Subacute osteomyelitis, multiple sites

  • M86.30—

    Chronic multifocal osteomyelitis, unspecified site

  • M86.311—

    Chronic multifocal osteomyelitis, right shoulder

  • M86.312—

    Chronic multifocal osteomyelitis, left shoulder

  • M86.319—

    Chronic multifocal osteomyelitis, unspecified shoulder

  • M86.321—

    Chronic multifocal osteomyelitis, right humerus

  • M86.322—

    Chronic multifocal osteomyelitis, left humerus

  • M86.329—

    Chronic multifocal osteomyelitis, unspecified humerus

  • M86.331—

    Chronic multifocal osteomyelitis, right radius and ulna

  • M86.332—

    Chronic multifocal osteomyelitis, left radius and ulna

  • M86.339—

    Chronic multifocal osteomyelitis, unspecified radius and ulna

  • M86.341—

    Chronic multifocal osteomyelitis, right hand

  • M86.342—

    Chronic multifocal osteomyelitis, left hand

  • M86.349—

    Chronic multifocal osteomyelitis, unspecified hand

  • M86.351—

    Chronic multifocal osteomyelitis, right femur

  • M86.352—

    Chronic multifocal osteomyelitis, left femur

  • M86.359—

    Chronic multifocal osteomyelitis, unspecified femur

  • M86.361—

    Chronic multifocal osteomyelitis, right tibia and fibula

  • M86.362—

    Chronic multifocal osteomyelitis, left tibia and fibula

  • M86.369—

    Chronic multifocal osteomyelitis, unspecified tibia and fibula

  • M86.371—

    Chronic multifocal osteomyelitis, right ankle and foot

  • M86.372—

    Chronic multifocal osteomyelitis, left ankle and foot

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